1H55.] PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 269 



Gvppya vacans; tbe inner fonr or five true laterals having an accessory 

 cusp on each side of the main point of the tooth while the unciui are 

 bluntly bi- or tridentate as in Nanina and Vitrinocomts. The present 

 station is the most northern recorded in Florida. The specimens col- 

 lected hapi)ened to be all destitute of the soft parts, though mostly iu 

 fresh condition. 



Zonites sculptilis Bland. 



JTelix sciilptilis Bid. (185':'), Binney, 1. c, p. 110. 



HaMtat. — Cumberland Mountain region, Binney; Waco, Tex., Hemp- 

 hill. 



This species has not yet been found in Florida, but the above exten- 

 sion of its range is so important as to warrant a notice of it. It was 

 collected by Mr. Hemphill while returning from his Florida trip. 



Zouites (Hyalina) arboreus Say. 



Helix arhorca Say, 1817, Binuey, 1. c, p. 114. 



Archer, Alachua County, Florida, and also at Enterprise on Lake 

 Monroe, Ball; Cedar Keys, Fla., and New Orleans, La., Hemphill. 



Zonites, (Hyalina) indentatus Say. 



Helix indentaia Say (1822), Biuney, 1. c, p. 116. 

 Enterprise, Lake Monroe, Florida, Dall ; Florida, Stearns, Jewett, 

 and others. 



Zonites (Hyalina) radiatulus Alder. 



Helix radiatui a AlAer, Cat. Nortli. and Durh., p. 12, No. 50, 1830. 



Helix striatnla Gray, non Liun6, uec Mailer; uudescribed. 



Helix nitidosa F6i-nssac ; nndescribed. 



Helix electrina Gould, luv. Mass., p. 183, fig. Ill, 1841, 



Helix 2)>(ra Pfeiffer, Binney, non Alder. 



Helix viridnla Pfeiffer ex lyarte, 1848; non 1881; Biuney apud Pfeiffer, nou 



Menke. 

 Helix hammonis Westerlund, Morch, Pfeiffer (1881) ; doubtfully of Strom, 1795. 



Habitat. — North America (except in the California^ region) in suit- 

 able localities ; Florida, Stearns, Jewett ; Enterprise, Lake Monroe, 

 Florida, Dall. 



A comparison with typical exami^les of Alder leaves no doubt that 

 the American shell known as Helix electrina of Gould is identical with 

 it. The R. pura of Alder is a diflFerent thing altogether. The viridula 

 of Menke, if referable at all to radiatula, is a variety of it not found in 

 America, and Menke's name was probably not prior to Alder's, being 

 published almost simultaneously. The H. hamynonis of Strom, described 

 from Trondhjem, Norway, in 1795, has been referred to a number of 

 small species, and cannot be said to be definitely identified with either. It 

 seems about time that the American shell was called by a name which, 

 without any doubt, belongs to it. It has a most extraordinary range; 

 the Museum possesses specimens from Point Barrow, the extreme north- 

 west point of the continent; from Florida, the southeast extreme, and 



