of Edinburgh, Session 1880 - 81 . 71 
Several specimens from Station 233a (Kob6, Japan), 8 to 50 
fathoms. 
Polycarpa , Heller. 
This genus is very closely allied to Styela. It is convenient, 
however, to separate them on account of the large number of species 
in the Styelince. The chief difference between the two genera is in 
the condition of the genital glands. 
Polycarpa. 
Mantle strong and free. Mantle thin and closely united to test. 
Test covered with sand. Test bare. 
Stalked. Not stalked. 
Tents. 12 long Tents. 20 long 
and 12 short, and 20 short. 
P. tinctor. P. pilella. 
Stalked. 
P. pedata. 
Not stalked. 
Tentacles all one Tentacles of two 
length. lengths. 
P. irregularis. P. sulcata. 
Test green. Testnot green. 
P. viridis. P. radicatus. 
Test having hairs Test not bearing 
like Molgula. hairs. 
P. molguloides. 
Test more or less sandy and stiff. Test pliable, not sandy. 
Olfactory tubercle 
Olfactory tubercle 
Shape hemispherical, Shape oblong, test 
oblong. 
circular. 
test smooth. 
rough. 
P. rigida. 
P. longisiphonica. 
P. minuta. 
P. quadrata. 
Polycarpa pedata, n. sp. 
External appearance , — Irregularly club-shaped, consisting of a 
long stalk supporting a somewhat globular body produced anteriorly; 
posterior end broad and rounded, passing rapidly into the narrow 
stalk which is nearly as long as the body; ventral edge nearly 
straight, dorsal strongly convex in its posterior half, straight in the 
