VAN NAME: SIMPLE ASCIDIANS. 493 
after extending dorsally a little way. The testes themselves are small 
pyriform or two-lobed glands lying against the free surface of the 
ovary and against the inner surface of the mantle about the border of, 
but not always very close to the ovary. 
In the specimens studied (all collected during the summer months), 
there was generally a group of embryos and tailed larvae in various 
stages in the peribranchial cavity anterior to the gonad on each side. 
These larvae appear to average several hundredths of a millimeter 
less in length than those of C. pajnllosa (see p. 500) and the eggs also 
appear to be slightly smaller than in that species. 
Recorded by Professor Verrill from shallow water and along the 
shore ("under stones near low water mark") in the region about East- 
port, Maine, and Grand Manan, N. B., but apparently of very much 
wider distribution, since the writer believes specimens from the fol- 
lowing localities also to belong to this species : 
Gulf of Saint Lawrence, between Pictou Island and Cape Bear (collected 
by J. F. Whiteaves). 
Station 2699 (N. lat. 45° 04', W. long. 55° 23', 72 fathoms). 
Station 2514 (N. lat. 43° 28' 30", W. long. 63° 57' 30", 126 fathoms, black 
mud). 
Casco Bay, Me. (large specimen). 
Baker's Island, near Salem, Mass. 
Station 159 (Gloucester Harbor, Mass., off Freshwater Cove, 8 fathoms, 
sand). 
Station 33 (off Cape Ann, N. lat. 42° 30', W. long. 70° 20', 90 fathoms, mud). 
Vineyard Sound, Mass., 14 fathoms. 
Off Gay Head, Mass. 
Station 848 (Narragansett Bay, R. I., 15| fathoms, mud). 
The writer finds that Verrill's species agrees so closely with the 
description of C. citrina (Alder and Hancock), 1848, that there is no 
doubt of their identity. C. citrina is recorded from various points 
on the British coasts (Northumberland, Durham, Isle of Man, Corn- 
wall, and Shetland). C.nana Kupffer, 1871, from Norway, the White 
Sea, the German and Danish coasts, etc., and C. echinoslphonica 
(Lacaze-Duthiers), 1877, of western Europe, are also identical accord- 
ing to Dr. Hartmeyer's view, with which the writer fully agrees. 
