240 
Proceedings of the Royal Society 
Olfactory tubercle prominent, elongated transversely, having the 
aperture placed laterally. Horns large, both coiled outwards. 
One specimen from Station 150 (south of Kerguelen Island); 
150 fathoms. 
MOLGULIM1. 
Branchial sac folded. 
Branchial sac not folded. 
Eugyra. 
Stigmata curved or 
straight, never in 
spirals. 
I 
Ascopera. 
Stigmata always more 
or less spirally- 
coiled. E. kerguelensis. 
I 
Molgula. 
Stalk shorter Stalk longer Body not peduncu- Body peduncu- 
than body. than body. lated. lated. 
A. gigantea. A. pedunculata. 
M. pedunculata. 
With sand, &c. ad- 
hering to the test. 
With no sand adhering to 
the test. 
Anterior half free 
from sand. 
Entirely covered M. gregaria. 
with sand. 
Olfactory tubercle Olfactory tubercle not coiled, 
much coiled. 
M. gigantea. 
Olf. tub. with both horns 
turned to the left. 
M. horrida. M. forbesi. 
Olf. tub. tubu- 
lar, no horns. 
M. pyriformis. 
