334 PROCEEDINGS OF THE ACADEMY OF [PaRT II 



somewhat oblique, narrow; outer lip obtuse, evenly arcuate, with 

 marginal erenulations corresponding to external spirals, and a 

 much smaller number of lirae (12) extending further within. The 

 columella has two sti'ong plaits and further out there are several 

 oblong tubercles on its face. A thin callus spreads a short dis- 

 tance forward over the ventral face. 



Length 12, diam. 6.7 mm. 



Type and a second specimen no. 2909 A. N. S. P. Both are 

 figured. 



C. tessellata Sowerby, besides being a much larger shell, differs 

 by the copious callous deposit which spreads over most of the ven- 

 tral face of the last whorl, and the embryonic shell is larger. A 

 specimen 27.3 m. long has nearly 7 whorls, of which about 2| be- 

 long to the embryonic stage. 



Possibly this is a younger stage of C. islacolonis Maury, which 

 has a more developed lip and a widely spreading callus in front. 

 The two examples however appear to be adult. 



Cancellaria gabbiana Pils. and Johns. Plate XXIT, fig. 12. 



Proc. A. N. S. Phila., 1917, p. 163. 



The last whorl is shorter and the aperture broader than in C. 

 epistomifera. There is a trace of the characteristic spout of the lip, 

 but much less marked than in that abundant species. The axial 

 ribs are fewer, more widely and less regularly spaced in gabbiana. 



Cancellaria (Trigonostoma) insularis Pils. and Johns. Plate XXII, fig. 11. 



Proc. A. N. S. Phila., 1917, p. 163. 



After the 1| smooth embryonic whorls the sculpture begins ab- 

 ruptly; there are about 14 retractive ribs on the first neanic whorl, 

 crossed by about 7 very much finer, spiral threads. The last whorl 

 has two somewhat enlarged ribs or varices next behind the lip, and 

 one but slightly prominent on the left side of the ventral face. 

 There are no varices on the earlier whorls. The spiral sculpture 

 of the last whorl is far less coarse than in C. gurabis Maury. There 

 are no spirals in the sutural excavation. 



While evidently related to C. gurabis, this differs in so many de- 

 tails that with present materials it appears to be distinct. 



OLIVIDAE. 

 Oliva reticularis Lam. 



The specimens which we refer to typical 0. reticularis are read- 

 ily separated from 0. cylindrica, in the large series at hand. 



