Jaw and Lingual Dentition of Pulmonata. 183 



Binneya notabilis, J. G. Coop. 

 Sta. Barbara Island, California. Mr. Henry Hemphill. 



Mr. Hemphill, who has contributed so largely to our 

 knowledge of the land shells of the Pacific coast, has lately 

 visited the Island of Sta. Barbara. Among the species found 

 by him is Binneya notabilis, which was originally described 

 from thence by Dr. J. G. Cooper. Mr. Hemphill has kindly 

 sent me living specimens, as well as others preserved in 

 spirits. I am, therefore, able to give a full generic descrip- 

 tion, with a figure (pi. xvii, fig. 4) of the animal as it 

 appears when half extended. I did not succeed in inducing 

 it to protrude itself fully. The descriptions will supersede 

 those formerly given by Mr. Blaud and myself in L. & Fr. 

 W. Sh. N. A., I. 67. 



When received, the living examples were furnished with the 

 peculiar epiphragm described by Dr. Cooper. On becoming 

 again active, this epiphragm was left entire, still adhering to 

 the surface on which the animal had formed it. In one indi- 

 vidual I observed a second, inner epiphragm, simple, without 

 the perpendicular walls. 



The Mexican genus Xanthonyx, is no doubt nearly allied 

 to Binneya, but it does not appear from the figures of 

 alcoholic specimens given by Messrs. Fischer and Crosse 

 (Moll. Mex. et Guat.) that the mantle of Xanthonyx is ex- 

 tended anteriorly, and the position given by them of the 

 respiratory office is different. Should future study of the 

 living animal prove Xanthonyx identical with Binneya, the 

 former will be considered as a synonyme of the latter. 



Dr. Pfeiffer (Mon. Hel. Viv. VII) suggests the identity 

 of Binneya with Daudebardia, ignoring entirely the distinc- 

 tion of the first divisions now recognized among the Geophila 

 of presence or absence of a jaw, or of aculeate or quadrate 

 teeth. By the modern arrangement these two genera are 

 most widely separated. 



