DALL : SYNOPSIS OF THE FAMILY DIPLODONTID/E. 245 



5. D. soror C. B. Adams, 1852. 



Range. Jamaica, West Indies ; north to Texas and the Florida 

 Keys ; fossil in the Miocene of Virginia and North Carolina. 



6. D. semiaspera Philippi, 1836 ; + D. granulosa C. B. Adams, 

 1852 ; + D. semireticulata d'Orb., 1846; not D. semiaspera Dkr. of 

 Japan. 



Range. Cape Hatteras, North Carolina to Rio Janeiro, Brazil, in 

 moderate depths of water. Also Pliocene of Florida. 



7. D. punctureila Dall. 



Range. Jamaica, West Indies. Also in the Oligocene of Bowden, 

 Jamaica. 



8. D. platensis Dall, n.sp. 



Range. In n fathoms off Rio de la Plata, Argentina, U.S. Fish 

 Commission. 



Section Sph^erella Conrad, 1838. 

 Type S. subvexa Conrad. 

 Range. Miocene of Virginia. 



9. D. verrilli Dall. =Z>. turgida V. and S., 1881, not Conrad, 

 1848. 



Range. Martha's Vineyard, Mass., to North Carolina, in 15-69 

 fathoms, U.S. Fish Commission; Grenada? W.I. , "Blake" Expedition. 



WEST AMERICAN SPECIES. 



Section Diplodonta s.s. 



1. D. orbella Gould, 1852; + Sphcerella tumida (Conr. MS.), 

 Cpr., 1863. 



Range. British Columbia, south to Lower California. 



2. D. tellinoides Reeve, 1850. 

 Range. Panama to Guayaquil. 



3. D. discrepans Cpr., 1857 (?) 

 Range. Mazatlan. 



4- D. subquadrata Cpr., 1855, not D. subquadrata Gabb, 

 1873, but perhaps D. undata Cpr., 1857. 



Range. Cape St. Lucas to Acapulco and Mazatlan. 



In his description (P.Z.S., 1855, P- 2 3°)> Carpenter has mistaken 

 the edge of the oblique and excavated hinge plate for a lateral tooth. 

 He has omitted it from the Mazatlan catalogue. 



Section Felaniella Dall. 



5. D. obliqua Philippi, 1846 ; + Lucina calculus Reeve, 1850. 

 Range. Cape St. Lucas, Xantus ; Mazatlan, Philippi. 



6. D. cornea Reeve, 1850. 

 Range. Gulf of Nicoya. 



