416 
BULLETIN OF THE UNITED STATES FISH COMMISSION. 
The different classes of Protozoa, and orders within the classes, are distributed 
more or less in zones. Thus the Infusoria, including the Ciliata and the Suctoria, are 
usually littoral in their habitat, living upon the shore-dwelling, or attached, water 
plants and upon the animals frequenting them. It is to be expected, therefore, that 
in forms here considered there should be a preponderance of Infusoria. Flagellated 
forms are also found in similar localities, but on the surface of the sea as well; hence 
the number described in these pages is probably only a small proportion of the total 
number of Mastigophora in this region. The Sarcodina, including the Foraminifera 
and the Radiolaria, are typically deep-sea forms and would not be represented by 
many types in the restricted locality examined at Woods Hole. Two species, Gromia 
lagenoides and Trun catulina lobatula , alone represent the great order of Foraminifera, 
while the still larger group of Radiolaria is not represented at all. 
The Protozoa described are distributed among the different orders as follows:* 
Class Sarcodina. 
Subclass Rhizopoda. 
Order Amcebida. Page. 
1. Amoeba guttula Duj 417 
2. Amoeba sp 417 
3. Trichosphxrium sieboldi Schn 418 
Order Reticulariida. 
Suborder Imperforina. 
4. Gromia lagenoides Gruber 419 
Suborder Perforina. 
5. Truncatulina lobatula Walker & Jacob 420 
Subclass Heliozoa. 
Order Aphrothoracida. 
6. Actinopkrys sol Ehr 420 
Order Chlamydophorida. 
7. Heterophrys myriapoda Archer 421 
Class Mastigophora. 
Subclass Flagellidia. 
Order Monadida. 
8. Mastigdmoeba simplex , n. sp 422 
9. Codonosca gracilis, n. sp 423 
10. Monas sp 423 
Order Choanoflagellida. 
11. Monosiga ovata S. Kent 424 
12. Monosiga fusiforrnis S. Kent 424 
13. Codonosiga botrytis (Ehr.) J. Cl 424 
Order Heteromastigida. 
14. Bodo globosus Stein 425 
15. Bodo caudatus (Duj . ) Stein 425 
16. Oxyrrhis marina Duj 425 
Order Euglenida. 
17. Astasia contorta Duj 426 
18. Anisonema vitrea Duj 426 
Order Sii.icoflagellida. 
19. Disteplianus speculum Stohr 427 
Subclass Dinoflagellidia. 
Order Adinida. 
20. Exuvixlla lima Cienk 428 
21. Exuvixlla marina Cienk 429 
Order Diniferida. 
22. Gymnodimium gracite Bergh 429 
23. Glcnodinium cinctum Ehr, j 430 
24. Glcnodinium compressa, n. sp 430 
25. Peridinium digitate Pouchet 431 
26. Peridinium diver gens Ehr 431 
27 . Ceratium tripos Nitsch 432 
28. Ceratium fusus Ehr 432 
29. Amplii&iniiim operculatum Clap. & Lach 432 
Class Infusoria. 
Subclass Ciliata. 
Order Holotrichida. 
Family Enchelinida;. Page. 
30. Lacrymaria lagenula Cl. & Lach 433 
31. Lacrymaria coronata Cl. & Lach 434 
32. Trachelocerca phcenicopterus Cohn 435 
33. Tiarina f usus Cl. & Lach 437 
34. Mesodinium cinctum , n. sp 436 
Family Trachylinide. 
35. Lionotus fasciola Ehr 438 
36. Loxophyllum setigerum Quenn 438 
Family Chlamydodontidie. 
37. Nassula microstoma Cohn 440 
38. Chilodon cucullulus Mull 441 
39. Hysteria lanceolata Cl. & Lach 441 
Family Chiliferid^e. 
40. Frontonia leucas Ehr 442 
41. Colpidium colpoda Ehr 443 
42. Uronema marina Duj 444 
Family Pleuronemidjs. 
43. Pleuronema chrysalis Ehr 444 
44. Pleuronema setigera, n. sp 445 
45. Lembus infusionum, n. sp 446 
46. Lembus pusillus Quenn 446 
Family Opalinidas. 
47. Anoploplirya branchiarum Stein 447 
Order Heterotrichida. 
Family Bursaridie. 
48. Condylostoma patens Miill 449 
Family Halteriidie. 
49. Strombidium caudatum From 450 
Family Tintinnidie. 
50. Tintinnopsis beroidea Stein 451 
51. Tintinnopsis davidoffi Daday 451 
Order Hypotrichida. 
Family Peritromid^e. 
52. Peritromus emmx Stein 452 
Family Oxytrichidie. 
53. Epiclintes radiosa Quenn 453 
54. Amphisia kessleri Wrzes 454 
Family Euplotidie. 
55. Euplotes charon Ehr 455 
56. Euplotes harpa Stein 455 
57. Diophrys appendiculatus Stein 456 
58. Crony chid setigera, n . sp 457 
59. Aspidisca hexeris Quenn 458 
60. Aspidisca polystyla Stein 458 
*This classification includes only the orders and families represented at Woods Hole. 
