294 BULLIDZ. 
sion of the foot is merely the usual oblique groove in this tribe, 
which simulates a separation of one part from the other; and 
that the gizzard in so small a creature has escaped detection. 
We hazard these conjectures, as the shell differs little from 
those of the minute Bulle; but as this species inhabits 
Mr. Alder’s vicinity, it would give great satisfaction if so 
competent an observer would communicate fuller notes of this 
interesting object. We observe that Mr. Alder states the 
tentacula of his animal to be “short, obtuse in front of the 
head and before the eyes.” M. Loven’s description of these 
organs is discordant, “vibracula brevia, conica, remota, late- 
ralia:’ this is an important variation: are the animals 
identical ? 
With respect to the minute Bulla strigella of M. Lovén 
and the B. conulus of M. Deshayes, we can only observe, with 
the authors of the ‘ British Mollusca,’ that they may prove 
varieties of the B. umbilicata. The so-called “ nitidula,” 
which is in our own collection, having been presented to us 
as a type by a friend, is, we think, a highly polished (by attri- 
tion) B. umbilicata. 
It appears to us that M. Lovén’s Cylichna, lately adopted 
by some authors, might well be dispensed with for the old 
typical genus Bulla. 
OTINA, Gray. 
We deposit in this family, ad interim, the Otina otis (Velu- 
tina, auct.), a curious and anomalous animal, being apparently 
as near to the Bullide as to the Conovuli. Though it has not 
the tentacula of the latter, it has the singular divided foot of 
Pedipes, and the eyes embedded in the disk of the head 
as in Conovulus; and, as in it, there is no operculum, in 
which point it also resembles Bulla, as well as in the absence 
of true tentacula. The animal appears to be an intermediate 
link of the two families. It requires, and we hope to give it, 
a further examination. At present it can only be considered 
incerte sedis. From the subjomed account, naturalists may 
form some opinion of its natural position. 
