356 
the epidermis, one of the few characters 
emphasized in the short description given 
by Hu tto n. — It will be necessary to give 
a complete description of the species. 
Two of the specimens are about 5 cm 
long, fairly well extended (Fig. 38); the 
third is only 9 mm long, much contracted. 
The two larger specimens are brownish, the 
tubefeet whitish; the anterior end (the in¬ 
trovert) and the tentacles white. The general 
shape is, as stated by Hutton, fusiform. 
The tubefeet are disposed in close series 
along each radius, not spreading over the 
interradii. The tentacles are in one of the 
specimens well extended; they are 25, dis¬ 
posed in two circles, an outer circle of 15 
larger, much branched, an inner circle of 
10 smaller ones. The dorsal pair of ten¬ 
tacles in the outer circle conspicuously smaller than the others; 
between their bases the genital duet opens on a rather large papilla. 
In the other larger specimen, with the tentacles retracted, I cannot 
find more than 18 of them. In the younger specimen only 15 
tentacles are found, evidently all belonging to the outer circle, the 
Fig.39. Calcareous ring and 
Polian vesicles of Pseudo- 
ciicumis Thomsoni. Two of 
the retractor muscles 
drawn, the one in the 
middle removed. ^/i. 
Fig. 40. Calcareous deposits of Pseiidocncumis Thomsoni. a. Tables, from 
above and in side view; b, rods from the tentacles; c. spicules from 
mouth-papillæ. 275 / 1 . 
