a New Genus of Terrestrial Mollusks, 209 



about twelve, quadrate, the inner cusp long, narrow, oblique, 

 bluntly pointed, outer cusp subobsolete (Plate ix, figs. 15- 

 17). 



Animal, shell, jaw and lingual membrane as already 

 described a])ove under HempldUla. (See Plate ix.) 



Animal about 12 mill, long (preserved in alcohol) ; 

 color smoky white, mottled with longitudinal, dark brown 

 blotches, running obliquely from the edge of the mantle to 

 the foot, uniformly with the coarse granulations, of which 

 we counted about twenty-five on cither side of the animal. 

 Caudal process very large, triangular in profile, dark brown, 

 with a few coarse granulations. 



Shell unguiform, slightly convex, light horn-color, very 

 thin, its edges almost membranous, with prominent concen- 

 tric lines of growth ; five mill, long, three wide. 



Hahilat. — Astoria, Oregon : Mr. Plenry Hemphill. 



Our description is drawn from specimens preserved in 

 alcohol, due allowance for which fact must be made. They 

 were collected at Astoria, Oregon, by Mr. Henry Hemphill, 

 to whora we dedicate the genus in return for most valuable 

 addition to our knowledge of the laud shells of the Pacific 

 region. 



This curious slug, by its general outline and by the form 

 and position of its shell, may be compared to Omalonyx 

 unguis D'Orb, and the species known formerly as Succinea 

 aj)pendiculaia Pfr., but now usually referred to Pellicula. 

 The former has, however, a jaw with the supplementary 

 extension as in Succinea, the latter has the jaw usual in 

 Bulimulus and O ylindrella , while neither of them has the 

 prolongation of the mantle. Both of those genera also are 

 readily distinguished by their shell being more developed 

 and approaching a spiral form. 



Hyalimax is distinguished from IIemj)liiUia by its Succinea- 

 like jaw. Otherwise, it resembles our genus in its general 



