334 WEST SOUTH AMERICAN SHELLS — STEARNS. 



203. Fissurella picta GmeL • 



A single specimen, hardly typical. 

 Manta. 



204. Lucapiuella iuaequalis (Sby.), Pilsbry. 

 = GIij2)his incequaUs Sby. 



Oue specimen. 



Manta. 



Mr. Pilsbr}- has recently separated several si)ecies heretofore as- 

 signed to Glyi)Ms and other genera, aud brought them together under 

 the above name of Lucapinella ; having detected a difference in the 

 character of the dentition, which varies from that of the forms aud 

 groups with which they had been previously associated. 



205. Lucapinella alta (C. B. Ad.), Pilsbry. 

 G?^jj/u-s alta C. B. Ad. 



Five specimens. 



Payta ; described from Panama by the author, where he collected 

 numerous examples. 



206. Lucapinella callomarginata Cpr. 

 = ChjpideUa callomarginata Cpr. 



One example (Mus. No. 48509). 



Payta. 



The specimen collected by Dr. Jones is i)erfect in every respect. 

 The orifice has more of the ke3'hole shape than any of the others in 

 the National collection. A comparison of the Museum series shows 

 considerable variation in this character. Carpenter illustrated this in 

 his " Report to the British Association," 185G, plate 7, by numerous 

 figures, and we may reasonably expect to find mutations in the form of 

 the orifice in this as well as iu the Fissurellas proper. 



A beach-worn example of what is probably the above species, was 

 obtained years ago (1837-40) by the United States exploring expedi- 

 tion, under command of Wilkes, at Valparaiso (Mus. No. 19135). 



The Jones and Exploring expedition si)ecimens extend the distri- 

 bution further to the south than heretofore reported b}' about 1,700 

 miles, Mr. Hemphill's Lower California examples from San Ignacio 

 Lagoon, being the southernmost to this date. The largest specimens 

 in the Museum are Postpliocene fossils from San Diego, collected by 

 Hemphill, the principal specimen measuring over 25 millimetres in 

 length. 



207 Chiton iCoiephium) spiniferus Trembly. 



= C. tuberculiferua Sby. 



= C. echinatits Barnes. 



-|- C. acuUatns Barnes, Auct. 



Payta. 



