MARINE PROTOZOA PROM WOODS HOLE. 
417 
Class Infusoria — Continued. Page. 
Subclass Ciliata— C ontinued. 
Order Peritrichida. 
Family Lichnophorida!. 
61. Liclmophora macfarlandi Stevens -159 
Family Vorticellid.'E. 
62. VorticeUa marina Greeff 461 
63. Vorticella patcllina Muller 461 
64. Zoothamnium elegans D’Udek 461 
65. Cothurnia crystaUina Ehr 462 
66. Cothurnia nodosa Cl. & Laeh 463 
67. Cothurnia imberbis Ehr 462 
Class Infusoria — Continued. Page. 
Subclass Suctoria. 
Family Podophrvidai. 
68. Podophrya gracilis, n. sp 463 
69. Ephelnta coronata Wright 464 
Family AcinetidjE. 
70. A cincta divisa Fraip 465 
71. Acineta tuberosa Ehr 465 
Family Dendrosomid.e. 
72. Trichophrya salparum Entz 466 
Genus AMCEBA Auct. 
The pseudopodia are lobose, sometimes absent, the body then progressing by a flowing move- 
ment; 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. 
Fig. 1 . — Amoeba guttula. 
Fig. 2 . — Amoeba sp. 
Amceba guttula Duj. Fig. 1. 
A minute form without pseudopodial processes, extremely hyaline in appearance, and character- 
ized 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 fi. 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. 
Amceba? 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 Arnosba proieus, 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 vacuoie absent; the nucleus is spherical and contains 
many large chromatin granules. Length 80/i; diameter 5 6/t. 
F. C. B. 1901—27 
