MARINE PROTOZOA FROM WOODS HOLE. 
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Genus CODONCECA James Clark ’66. 
(Kent ’81.) 
Small forms inclosed in cup or “house” of ovoid or goblet shape, colorless and probably 
gelatinous (chitin?) in texture, and borne upon a stalk. The monad does not completely fill the test. 
Contractile vacuole single, posterior. 
Codonoeca gracilis, n. sp. Fig. 8. 
The cup is urn-shaped with a well-defined neck or collar borne upon a shoulder-like end of the body. 
It is hyaline, colorless, and carried upon a stalk equal in length to the cup or shorter than this. The 
animal does not fill the cup, nor is it attached by a filament to the latter. There is a single flagellum. 
The nucleus is minute and lateral in position; the contractile vacuole is in the posterior end of the 
body. Total length of cup and stalk 21//; of cup alone 12//. This minute form looked so much like a 
choanoflagellate that I supposed it to be one until I discovered an empty case (Fig. 8). 
Genus MONAS (Ehr.) Stein ’78. 
(Kent '81; Butschli ’86; Klebs ’97; Sennl900.) 
The body is small, globular or oval and either free-swimming or fastened by one of the two 
flagella. The body is sometimes a little amoeboid, with short pseudopodial processes. In addition to 
the main flagellum, there are usually one or two small flagella at the basis of the larger one. The 
nucleus is usually anterior, and one or two contractile vacuoles are present. 
Monas sp. Fig. 9. 
An extremely small form (3//) attached by a thread of protoplasm — perhaps a flagellum, to algse. 
The body is ovoid and the main flagellum is about four times the length of the body. The contractile 
vacuole is posterior. Only one specimen was seen and upon this I shall not attempt to name the 
species. 
Genus MONOSIGA Kent '81. 
(Biitschli ’86; Franc6 ’97; Senn 1900.) 
Small colorless forms of Choanoflagellida, always naked and solitary. The posterior end is attached 
directly to the substratum, or there is a short stalk not exceeding the body in length. Kent ’81 
distinguished nine species, but Butschli questioned the accuracy of many of these, and in this he was 
