MARINE PROTOZOA FROM WOODS HOLE. 
465 
Acmeta divisa Fraipont 79. Pig. 67. 
This extremely graceful form is common on Bryozoa at Woods Hole. The cup is shaped like a 
wine glass and is specifically characterized by a cup-formed membrane upon which the animal rests. 
The animal thus has the appearance of being suspended on the edge of the cup. The stalk is slender 
and about 4 times the length of the body. The tentacles are all capitate and distributed, and about 
2 j times the body length. They sway back and forth very slowly. The nucleus is spherical and 
central in position. The contractile vacuole 
lies near the periphery. 
Length of body 27//; of stalk 100//; of 
extended tentacle 65//. 
Acineta tuberosa Ehr. Fig. 68: 
Large forms of Suctorin with tentacles ar- 
ranged in fascicles. The stalk is variable in 
length and the cup is frequently so delicate 
that it can barely be made out. A specific 
characteristic is the break in continuity of 
the cup at different points, and through these 
places the tentacles emerge in bundles. The tentacles are capitate and in the Woods Hole form, 15 
in number in each of the two bundles. The endoplasm is granular and yellowish in color. The col- 
oring matter is frequently arranged in patterns. The nucleus is spheroidal. The contractile vacuole 
is in the anterior third of the body about midway between the bundles of tentacles. Reproduction 
not observed. 
Length of body 330 n. 
F. C. B. 1901—30 
