Description of HemphiUia. 208 



XVI. — Description of HemphiUia, a New Genus of Ter- 

 restrial Mollushs. 



Bt THOMAS BLAND akd W. G. BINNEY. 



Read October 7, 1872. 

 [Reprinted from the Annals of the Lyceum of Natural History, N. Y., Vol. x, Oct., 1872.1 



Hempliillia. 



Animal liraaciforrae, parvum, antice obtusum, postice attenuatum. Pal- 

 lium subcentrale, magnum, ovatum, antice valde productum, marginibus 

 liberis. Discus gressorius distiuctus nuUus. Porus mucosas transversus 

 in apice pedis, processu coniforme valido protectus. Apertura respiratoria 

 ad dextram, in medio marginis inferioris pallii, genitalis ad basin tenta- 

 culi dextri oculigeri. 



Testa externa, unguiformis, subquadrata, replicatura pallii margiuorura 

 breviter inclusa. 



Maxilla et lamina lingualis ut in Arione constituta, dentes centrales 

 tricuspidatae, laterales bicuspidatae, marginales quadratse, bicuspidatse, 

 papillis internis valde productis, externis subobsoletis. 



Animal limaciform, small, blmit in front, tapering behind. 

 Mantle subcentral, large, oval, greatly produced in front, 

 free around its margin and slightly reflected over the edges 

 of the shell. No distinct locomotive disk to foot. Lines 

 of furrows run near and parallel to edge of foot, rising above 

 the extremity and apparently uniting over a transverse, 

 mucus slit, overhanging which is a greatly produced horn- 

 shaped process. Respiratory orifice at right edge of mantle, 

 near its centre. Generative orifice at right side of neck, 

 near right eye peduncle (Plate ix, figs. 1 and 3). 



Shell external, its edges imbedded lightly in the mantle, 

 very thin, unguiform, almost as large as the mantle (in spec- 

 imens preserved in alcohol) (Plate ix, fig. 5). 



Jaw wide, low, slightly arcuate ; ends blunt, but little 

 attenuated ; anterior surface with numerous ribs deuticulating 

 either margin. 



Lingual membrane as usual in the Helicidoe. Teeth in 

 HemphiUia glandulosa about 23-1-23. Centrals and laterals 

 long, the former tricuspid, the latter bicuspid; marginals 



