NO. 1177. NORTH AMERICAN LEPTONACEA— BALL. 877 



INCERT^ SEDIS. 



Cyamium Philipx>i, 1845. C. antarcticum Philippi. 

 Scioieretia Bernard, 1896. S. australis Bernard. 

 Montacuta Turton, 1822. Ligula substriata Montagu. 

 Aligena H. C. Lea, 1845. Ahra wquata Conrad. 



? Section : Spaniodon Reuse, 1867. S. nitidus Eeuss. 

 Cycladella Carpenter, 1865. C. papyracea Carpenter. 

 Asliornseti ia Friele, 1886. A. striata Friele.' 



A.— SPECIES OF THE EAST COAST OF NORTH AMERICA. 

 Genus SOLECARDIA Conrad. 



1. Solecardia {Scintilla) morchii Dall, 1899; St. Thomas, West Indies. 



Scintilla ebiirnea Morch, 1876 ; not Conrad, 1849. 



Genus SPORTELLA Deshayes. 



2. Sportella [Fabella] pilsbryi Dall, 1899; 17 miles off Cape Hatteras, 



North Carolina, in 49 fathoms sand; U. S. Fish Commission. 



3. Sportella {Fahella) protexta (Conrad) 1841; 17 miles off Cape Look- 



out, North Carolina, in 22 fathoms sand; U. S. Fish Com- 

 mission. 



This is Amplddesma protexta Conrad, 1841, -\- Hiatella lancea H. C. Lea, 1845, and 

 Saxicava fragilis Holmes, 1859. It ranges from the Miocene to the present 

 fauna. 



Genus ANISODONTA Deshayes. 



4. Anisodonta (Basterotia) quadrata (Hinds) 1844; coast of North 



Carolina to the West Indies. 

 Tyi^e of the genus Eucharis E6cluz, 1850; not Latreille, 1804. 



5. Anisodonta {Fulcrella) elUptica R^cluz, 1850; North Carolina to 



Guadelupe Island, West Indies; Miocene ? 



6. Anisodonta (Fulcrella) corhuloidea Dall, 1899; North Carolina. 



Genus LEPTON Turton. 



7. Lepton lepidum (Say) 1826; Charleston Harbor, South Carolina. 



Amphidesma h-pidum of Say. 



8. Lepton placunoideum Carpenter, 1857; "West Indies." 



Genus ERYCINA Lamarck. 



9. Erycina linella Dall, 1899; off Cape Lookout, North Carolina. 

 10. Erycina emmonsi Dall, 1899 ; coast of North Carolina. 



' Referred by Friele to Tellinidw, following Jeffreys's advice, but possibly related to 

 Montacuta. I may add that the genus Erycinella Courad, 1845, which from its name 

 might be supposed to belong among the Leptonacea, probably should be classed 

 among those Carditida;, like Carditella Smith, which have an internal resilium. 



