MARINE PROTOZOA FROM WOODS HOLE. 
463 
Cothurnia nodosa Claparede & Lachmann. Fig. 64. 
A. Smooth cup. — Colhwrnia marltima Ehr., Eichwald, Stein, Kent. 
B. Cross-ringed cup. — C. pupa Eichwald, Stein, Cohn; C. nodosa Cl. & L.; V. crystallina Entz ’78; C. pontica Meresch., 
Kent; C. cohnii and pupa Kent; C. longipes Kellicott ’94. 
The cup is elongated, swollen centrally, tapering at oral end and conical at base or rounded. 
Oral opening either circular or elliptical. Cross rings may or may not be present, and the cup is either 
smooth or annulate. Length of cup 70 // to 80//. The stalk which supports the cup is extremely 
variable in length. The animal is borne upon a stalk of variable length within the cup. 
Entz states that the many variations which this species exhibits run into each other so gradually 
that he does not believe it wise to separate them. The Woods Hole forms which I found on algte of 
various kinds were nearly of a size, and did not vary much from the one figured. Kellicott ’94 
described a Cothurnia from Woods Hole under the name of C. longipes, which I believe is only a long- 
stemmed variety of C. nodosa. My form has the following dimensions: Cup 75//; cup stalk 38//; 
animal stalk 14//. 
Keg to families of Sucforia. 
a. Unattached forms; ventral cilia present; one suctorial tentacle Hypocomidx 
b. Attached forms; thecate and athecate tentacles simple, one or two in number Urnulidx 
c. Thecate; posterior end of cup drawn out into stalk; walls perforated for exit of tentacles Metacinetidie 
d. Stalked or unstalked; globular; tentacles of different kinds, some knobbed, others pointed (2 gen- 
era * Ephelota * Podophrya) Podophryidss 
e. Naked or thecate; stalked or not; tentacles numerous, usually knobbed and all alike Acinetidx 
f. Naked; athecate; tentacles numerous, all alike, knobbed and grouped in tufts. They may be simple or 
branched Dendrosomidse 
g. Sessile forms resting on basal surface or on a portion raised like a stalk; tentacles many; short and 
knobbed; distributed on apical surface or localized on branched arms Dendrocometidas 
li. Stalked or sessile; tentacles long, rarely knobbed, supported on proboscis-like processes Ophryodendridae 
Genus PODOPHRYA Ehr. '33. 
(Biitschli '88; Stein ’59; Perty ’52; Oienkowsky ’55; Quenn. ’69; Hertwig ’77; Maupas ’81.) 
The body is globular, with tentacles radiating in all directions. The tentacles may be very short 
or very long. The stalk also is either short or long, and some species form stalks but rarely ( P. libera). 
The macronucleus is centrally placed and globular to ovoid in form. The contractile vacuole is usually 
single. Reproduction takes place by division; the distal half developing cilia and becoming a swarm- 
spore. Fresh and salt water. 
Podophrya gracilis, n. sp. Fig. 65. 
Of all the Podophrya. that have been described not one approaches this minute form in the relative 
length of the stalk. The body is spherical and is covered with short capitate tentacles. The stalk is 
extremely slender, bent, and without obvious structure. There are one or two contractile vacuoles in 
the distal half of the body. The nucleus is small and is situated near the insertion-point of the stalk. 
Reproduction not observed. Diameter of body 8//; length of stalk 40//. Only one specimen seen. 
Genus EPHELOTA Str. Wright ’78. 
(Biitschli '88; Ishikawa ’96; Sand ’98.) 
Small to medium-sized and large forms; colorless to brown. The body is globular or oval or wedge- 
shape, sometimes quadrangular. The stalk is variable, sometimes 1 mm. in length. The diameter 
of the stalk increases from the point of attachment to the body of the animal; it is usually striated 
either longitudinally or transversely, or both. The tentacles are of. two kinds and are usually confined 
to the anterior half' of the body. Some are long and sharp-pointed and adapted for piercing; others 
are short, cylindrical, usually retracted and capitate, adapted for sucking. Contractile vacuoles vary 
from one to many. The macronucleus is nearly central in position and usually of horseshoe shape, 
