Marine Protozoa from Woods Hole | Page 2

MONADIDA. 8. Mastigamoeba simplex, n. sp. 9. Codonoeca gracilis, n. sp. 10. Monas sp. Order CHOANOFLAGELLIDA. 11. Monosiga ovata S. Kent. 12. Monosiga fusiformis S. Kent. 13. Codonosiga botrytis (Ehr.) J. Cl. Order HETEROMASTIGIDA. 14. Bodo globosus Stein. 15. Bodo caudatus (Duj.) Stein. 16. Oxyrrhis marina Duj. Order EUGLENIDA. 17. Astasia contorta Duj. 18. Anisonema vitrea Duj. Order SILICOFLAGELLIDA. 19. Distephanus speculum St?hr. Subclass DINOFLAGELLIDIA. Order ADINIDA. 20. Exuvi?lla lima Clenk. 21. Exuvi?lla marina Clenk. Order DINIFERIDA. 22. Gymnodinium gracile Bergh. 23. Glenodinium cinctum Ehr. 24. Glenodinium compressa, n. sp. 25. Peridinium digitale Pouchet. 26. Peridinium divergens Ehr. 27. Ceratium tripos Nitsch. 28. Ceratium fusus Ehr. 29. Amphidinium operculatum Clap. & Lach. Class INFUSORIA. Subclass CILIATA. Order HOLOTRICHIDA. Family ENCHELINID?. 30. Lacrymaria lagenula Cl. & Lach. 31. Lacrymaria coronata Cl. & Lach. 32. Trachelocerca phoenicopterus Cohn. 33. Tiarina fusus Cl. & Lach. 34. Mesodinium cinctum, n. sp. Family TRACHYLINID?. 35. Lionotus fasciola Ehr. 36. Loxophyllum setigerum Quenn. Family CHLAMYDODONTID?. 37. Nassula microstoma Cohn. 38. Chilodon cucullulus M��ll. 39. Dysteria lanceolata Cl. & Lach. Family CHILIFERID?. 40. Frontonia leucas Ehr. 41. Colpidium colpoda Ehr. 42. Uronema marina Duj. Family PLEURONEMID?. 43. Pleuronema chrysalis Ehr. 44. Pleuronema setigera, n. sp. 45. Lembus infusionum, n. sp. 46. Lembus pusillus Quenn. Family OPALINID?. 47. Anoplophrya branchiarum Stein. Order HETEROTRICHIDA. Family BURSARID?. 48. Condylostoma patens M��ll. Family HALTERID?. 49. Strombidium caudatum From. Family TINTINNID?. 50. Tintinnopsis beroidea Stein. 51. Tintinnopsis davidoffi Daday. Order HYPOTRICHIDA. Family PERITROMID?. 52. Peritromus emm? Stein. Family OXYTRICHID?. 53. Epiclintes radiosa Quenn. 54. Amphisia kessleri Wrzes. Family EUPLOTID?. 55. Euplotes charon Ehr. 56. Euplotes harpa Stein. 57. Diophrys appendiculatus Stein. 58. Uronychia setigera, n. sp. 59. Aspidisca hexeris Quenn. 60. Aspidisca polystyla Stein. Order PERITRICHIDA. Family LICHNOPHORID?. 61. Lichnophora macfarlandi Stevens. Family VORTICELLID?. 62. Vorticella marina Greeff. 63. Vorticella patellina M��ller. 64. Zoothamnium elegans D'Udek. 65. Cothurnia crystallina Ehr. 66. Cothurnia nodosa Cl. & Lach. 67. Cothurnia imberbis Ehr. Subclass SUCTORIA. Family PODOPHRYID?. 68. Podophrya gracilis, n. sp. 69. Ephelota coronata Wright. Family ACINETID?. 70. Acineta divisa Fraip. 71. Acineta tuberosa Ehr. Family DENDROSOMID?. 72. Trichophrya salparum Entz.
* This classification includes only the orders and families represented at Woods Hole

Genus AMOEBA Auct.
The pseudopodia are lobose, sometimes absent, the body then progressing by a flowing movement; the body consists of ectoplasm and endoplasm, the latter being granular and internal, the former hyaline and external. There is always one nucleus and one vacuole, but both may be more numerous. Reproduction takes place by division or by spore-formation. Fresh-water and marine.
Amoeba guttala Duj. Fig. 1.
A minute form without pseudopodial processes, extremely hyaline in appearance, and characterized by rapid flowing in one direction. The body is club-shape and moves with the swollen end in advance. A comparatively small number of large granules are found in the swollen portion, while the smaller posterior end is quite hyaline. Contractile vacuole absent, and a nucleus was not seen. Frequent in decomposing vegetable matter. Length 37��. Traverses a distance of 160�� in one minute.
The fresh-water form of A. guttula has a vacuole, otherwise Dujardin's description agrees perfectly with the Woods Hole forms.
[Illustration: Fig. 1.--Amoeba guttala.]
Amoeba? Fig. 2.
A more sluggish form than the preceding, distinguished by its larger size, its dense granulation, and by short, rounded pseudopodia, which, as in Amoeba proteus, may come from any part of the body. A delicate layer of ectoplasm surrounds the granular endoplasm, and pseudopodia formation is eruptive, beginning with the accumulation of ectoplasm. Movement rapid, usually in one direction, but may be backwards or sideways, etc. Contractile vacuole absent; the nucleus is spherical and contains many large chromatin granules. Length 80��; diameter 56��.
[Illustration: Fig. 2.--Amoeba sp.]
Genus TRICHOSPH?RIUM Schneider '78
Synonym: Pachymyxa hystrix Gruber.
Marine rhizopods, globular or irregular in form, and slow to change shape. Dimorphic. Both forms multinucleate during vegetative life. Pseudopodia are long, thin, and thread-form, with rounded ends. Their function is neither food-getting nor locomotion, but probably tasting. The plasm of both forms is inclosed in a soft gelatinous membrane. In one form the jelly is impregnated with needles of magnesium carbonate (Schaudinn), but these are absent in the other form. The membrane is perforated by clearly defined and permanent holes for the exit of the pseudopodia. Reproduction occurs by division, by budding or by fragmentation, but the parts are invariably multinucleate. At the end of vegetative life the needle-bearing form fragments into numerous mononucleate parts; these develop into adults similar to the parent, but without the spines. At the end of its vegetative life this new individual fragments into biflagellated swarm-spores which may conjugate, reproducing the form with needles. Size up to 2 mm.
Trichosph?rium sieboldi Schneider. Fig. 3.
With the characters of the genus. A form which I have taken to be a young stage of this interesting rhizopod is described as follows:
A minute, almost quiescent, form which changes its contour very