1921] NATURAL SCIENCES OF PHILADELPHIA. 365 



Cypraea henekeni Sowerby. 



Cypraca hcnikeri Sowerbj^ Q. J. Geol. Soc, vi, 1S49, p. 45, pi. 9, fig. 3. 

 Cypraea henekeni Sby., Gabb, Tr. Am. Philos. Soc, xv, p. 235. 

 Cypraea henikeni Sowb., var., Brown and Pilsbry, Proc. A. N. S. Phila. 1911, 

 p. 356, pi. 26, figs. 9, 10. 



This species resembles the recent C. mus, and has parallel var- 

 iations, both having smooth and bicornute or bituberculate forms. 

 In C. henekeni the tuberculate form predominates, and the tubercles 

 are larger, being thus more specialized than the modern race of the 

 same stock. It has been well figured by Sowerby. A variety occurs 

 in the Gatun bed. 



Length 38 to 66 mm. 



Cypraea spiircoides Gabb. Plate XXX, figs. 4, 5. 



Cypraea spurcoides Gabb, Tr. Am. Philos. Soc, xv, 1873, p. 235. 



Gabb has compared it with C. spurca, but of recent species it 

 seems to us closest to large examples of C. annulus in shape. 

 Length 32.8, diam. 20.3 mm. Type no. 2999 A. N. S. P. 

 Length 24, diam. 15.7 mm. 



Cypraea raymondrobertsi a. sp. Plate XXX, figs. 1, 2, 3. 



The shell is subovate in basal outline, solid, with the sides heavily 

 calloused, laterally angular, the callus rising high, especially on the 

 left side, and covering the spire, which is marked by a shallow irregu- 

 lar pit. Ends but little produced. The outer lip has 19 strong teeth, 

 narrower than their intervals. Inner lip with 17 teeth. The base 

 is rather strongly convex. 



Length 27, lateral diam 19.2, dorso-ventral diam. 14.9 mm. 



Somewhat like C. arahicula Lam. by its angular sides, the aper- 

 ture as in C. albugmosa Mawe. 



Type no. 3995 A. N. S. P. 



In the Bowden bed there is a form similar in having angular lat- 

 eral calluses, but differing by having fewer teeth, 16 and 13 on the 

 outer and inner lips respectively. They extend further upon the 

 base, which is less convex. Length 25.5, width 17.3 mm. This form 

 may be called Cyprcea raymondrobertsi howdenensis (PI, XXX, fig. 6). 



Type no. 11146 A. N. S. P. 



Cypraea spurca Linne. 



A series of six. We find no character to differentiate them from 

 recent shells. 



Cypraea campbeUiana n. sp. Plate XXX, figs. 9, 10. 



The shell is oblong-oval, but slightly produced at the ends, mod- 



