1921] NATURAL SCIENCES OF PHILADELPHIA. 313 



Volvula parallela Pils. and Johns. Text-flg. 11. 

 Proc. A. N. S. Phila. 1917, p. 151. 



Volvula cylichnoides Pils. and Johns. Text-flg. 9. 



Proc. A. N. S. Phila., 1917, p. 151. 



Cf. Retusa yaqiiennis Maury, which, however, has spiral sculp- 

 ture. 



SCAPHANDRIDAE. 



Atys cinctorii Pils and Johns. Text-flg. 10. 



Proc. A. N. S. Phila., 1917, p. 152. 



Atys sulculorum Pils. and Johns. Text-flg. 12. 



Proc. A. N. S. Phila. 1917, p. 152. 



Atys (Aliculastrum) caribaea (Orb.) 



A. caribaea Orb., Pilsbry, Man. Conch, xv, p. 274, pi. 48, fig. 12. 

 lA. riiseana Morch, Malak. Bl. xxii. p. 173. 



A few specimens agree with recent shells which the writer has 



referred to d'Orbigny's species. Cf. also Atys gracilis Da 11, from 



the Chipola horizon. 



AKERIDAE. 



Haminoea granosa (Sowerby) 



Bulla granosa Sowerby, Trans. Geol. Soc. Lond. iv, 1849, p. 51, pi. 10, fig. 10. 



This species is unusually solid for the genus, and more strongly 



sculptured than the recent forms. 



BULLARIIDAE. 



Bullaria solida (Gmel.) 



Bulla solida Gmel., Pilsbry, Man. Conch, xv, p. 335. 



Several specimens, the largest 40.5 mm. long, 30.5 wide, appear 



to be referable to this recent species. It has been described as 



Bullaria sarahberlinerce Maury. 



Bullaria paupercula (.Sowerby) 



Bulla paupercula Sowb., Gabb. Tr. Amer. Philos. Soc. xv, p. 246. 



Gabb has identified a series of specimens very similar to the re- 

 cent B. amygdalus Dillw., with the imperfectly defined species of 

 Sowerby. Without access to Sowerby 's type, the question of 

 specific identity cannot profitably be taken up. 



RINGICULIDAE. 



Ringicula semilimata Dall. 



Ringicula semilipiaia Dall, Proc. IT. S. N. Mus. xviii. 1895, p. 24; Trans. 

 Wagner Inst. Sci. iii, pt. 6, pi. 60, fig. 24. 



