34 Notes on Mediterranean Mollusca. 
An imperfect but characteristic specimen. It differs from 
D. Leufroyi in having a longer spire, regular and fine trans- 
verse strize, no ribs, and merely a few nodulous markings on 
the upper whorls; the groove is more distinct, and the canal 
is not so short and abrupt. Plewrotoma inflata of Cristofori 
and Jan has the same longitudinal ribs as D. Leufroys (which 
is not given in their catalogue) ; and I consider it a variety of 
the last-named species. 
{Pleurotoma modiolus, Cristofori & Jan. 
Fusus modiolus, Cat. (1832), p. 10. 
Pleurotoma carinatum, Ph. Moll. Sic. ii. (1844) p. 176, t. xxvi. f. 19. 
From 217 fms. Also North Atlantic. First described and 
known as an Italian fossil. 
| Cylichna ovata, Jeftr. 
Cylichna umbilicata ; var. conulus, B. C. iv. p. 414. 
From 337-464 fms. Throughout the North Atlantic, and 
fossil in the South-Italian Tertiaries. Not Bulla conulus of 
Deshayes, nor C. striatula of Forbes with several synonyms. 
Cylindrobulla fragilis, Jeff. 
Cylichna fragilis, Ann. & Mag. Nat. Hist. 1856, xvii. p. 188, pl. ii. ff 16, 
Wie 
From 1521-1536 fms. Spezzia, and dredged by Mr. 
McAndrew on the Atlantic coast of Spain. The ‘ Washing- 
ton’ specimens are adult ; the largest is ;§ inch long. They 
are microscopically and regularly-striated_in a transverse or 
spiral direction. I cannot agree with the Messrs. Adams that 
Fischer’s genus Cylindrobulla is the same as Lophocercus, nor 
with Monterosato in considering it a section of Acera; although 
the generic characters require some amendment. 
tActeon pusillus, Korb. 
Tornatella pusilla, Rep. Adg. Invert. p. 191. 
From 217 fms. Also North Atlantic and a Sicilian fossil. 
Scarcely distinguishable from A. Now of the English and Bel- 
gian Crags, and of the Icelandic ‘Tertiary or Post-tertiary de- 
posits, except in respect of size. 
| Scaphander punctostriatus, Mighels & Adams. 
Bulla punctostriata, Boston Journ. Nat Hist. vol. iv. (1842) p. 43, 
pl. iv. f. 10, 
