148 PROCEEDINGS : BOSTON SOCIETY NATURAL HISTORY. 
Toxoglossa. 
COXIDAE. 
Mangilia cerina (Kurtz and Stinips.). Verrill (’13), p. 637. 
Pleurotema c. Smith and Prime (’70), p. 398. S. 
One specimen from sandy mud in 7 fathoms. 
OPISTHOBRAN CHIATA. 
TECTIBR AN CHIATA. 
Torxatixidae. 
Tornatina canaliculata (Say). Bulla c. Smith and Prime 
(’70), p. 399. Utriculus c. Verrill (’73), p. 663. S. 
Not uncommon below tide-marks, but usually dead. The speci¬ 
mens fall into two well-separated groups, the first consisting of larger 
shells with yellow epidermis and tapered spire, the second of much 
smaller shells usually greatly eroded, the remains of the spire much 
thicker and flatter, the columella tooth less conspicuous. Some of 
the latter answer better to descriptions of Betusa pertenuis Mighels 
than they do to those of T. canaliculata. Why the old shells should 
have the epidermis usually intact while the young shells usually lack 
it, is a puzzle. The same thing is noticeable in Cylichna alba 
Brown, from more northern waters. 
Bullidae. 
Haminea solitaria (Say). Bulla s. Smith and Prime (’70), p. 
399. Verrill (’73), p. 662. S. 
Dead shells common in dredging. Rather uncommon alive. 
Occurs on marsh grass, top of sea wall, etc. 
ASCOGLOSSA. 
IIekmaeidae. 
Ifermaea cruciata A. Agassiz MSS. Gould (’70), p. 253. 
Verrill (’73), p. 667. 
