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Mr. A. Adams on the Animals of certain Mollusca. 109 3 
XVIII.—WNotes on the Animals of certain Genera of Mollusca. 
By Arruur Apams, F.L.S. &e. 
Genus VoLuTHarPA, Fischer. 
M. Fiscuer, in his ‘Journal de Conchyliologie,’ 1855, p. 85, 
describes a genus under the name of Volutharpa, from the shell 
only. When at Hakodadi, I found the Bullia Perryi of Jay, 
and refer it to M. Fischer’s genus ; and further north, at Aniwa 
Bay, Saghalien, I met with Bullia ampullacea of Middendorf, 
and believe it to form another species of the same genus. I 
procured by the dredge one living specimen of the latter species 
from a depth of 17 fathoms. The animal is like Buccinum, of a 
white colour sparsely sprinkled with black on the head, foot, and 
siphon. The tentacles are broad, close together at the base, and 
rather short, with the eyes on the outer side, near the middle. 
The siphon is thick and short, and the foot is fleshy, and simple 
behind. The operculum is subcircular, with concentric strie of 
growth ; and the nucleus is within the margin, at the fore part. 
Thus the simple foot and the possession of eyes remove it from 
the genus Bullia, and the form and texture of the shell from 
Buccinum. The operculum is different from that of Pseudoliva 
or Gastridia, and the shell is without the tooth at the fore part 
of the outer lip. The natural position of the genus is between 
Buccinum and Pseudoliva. 
Species of Volutharpa. 
Deshayesiana, Fisch. 
ampullacea, Midd. (Bullia). 
Perryi, Jay (Bullia). 
Limneana, A. Ad. (Bullia). 
Genus Naticrina, Gray. 
The animal of this genus resembles that of Morvillia or 
Limneria; and the genus should be removed from the family 
Naticidz to that of Velutinide. The tentacles are short and 
rather flattened, with the eyes at their outer bases. The mantle 
lines the shell, and is thickened at the edge, but is not produced 
beyond, and does not cover the margin of the shell, as it does 
in Marsenina and Velutella. The foot is small and oblong, auri- 
culate on each side in front; and there is no operculum. The 
male organ is large and compressed, and is situated at the outer 
base of the right tentacle. A fold of the mantle covers the colu- 
mellar lip of the shell. The animal is timid, crawls very slowly, 
and is of a dead white colour. Dredged from 46 fathoms, in the 
Straits of Korea. 
Genus Stenoruyra, Benson. 
The animal of Stenothyra or Nematura is similar to that of 
