BALCH: LIST OF MARINE MOLLUSCA. 
149 
Two specimens from Ceramium and other red sea-weeds on 
stony bottom off Lloyd’s neck. Only once before reported, so far 
as I know, viz., by Agassiz at Naushon in 1863 ; but Professor 
Yerrill informs me that he lias taken it several times. Probably it 
is not so much rare as capricious in occurrence, like so many nudi- 
branchs. 
N PI) IB RAN C HI AT A. 
Kladoiiepatica. 
Ceatexidae. 
? Cratena gymnota (Couth.). Bergh (’92), p. 31. Coryphella 
g. Yerrill (’73), p. 667. 
These specimens, found depositing eggs on eel-grass, Aug. 26, 
were unfortunately not preserved for complete identification. They 
differed markedly from var. gouldii Yerrill (Bergh (’92), p. 31, 
— Montagna g. Yerrill (’73), p. 667), of which one specimen was 
taken from compound tunicates. On the authority of Profes¬ 
sor Yerrill this is made a variety of C. gymnota. 
Cratena pilata (Gould). Bergh (’92), p. 31. Montagna p. 
Yerrill (’73), p. 666. M. vermifera Yerrill (’73), p. 666. Aeolis 
vermiferus Smith. Smith and Prime (’70), p. 391. 
Common but of small size on hydroids from lobster-pot lines a 
fathom or two below the surface. Also in dredgings of eel-grass. 
On the authority of Professor Yerrill Aeolis vermiferus Smith is 
reduced to synonymy. Specimens answering both descriptions were 
taken. 
Teegipedidae. 
Tergipes desptectus (Johnst.). Yerrill ( 73), p. 667. Bergh 
(’92), p. 31. N. 
Rather uncommon on hydroids from lobster-pot lines. 
Embletonia fuseata, Gould (’70), p. 251. Bergh (’92), p. 34. N. 
Rather uncommon on hydroids from lobster-pot lines. This is 
the first reported occurrence south of Cape Cod so far as I know. 
