PACIFIC COAST SPECIES. Ill 



if not completely, iuternal, while the shell of Hemphillia is almost en- 

 tirely exposed. 



Binneya, in its prolonged mantle and costate jaw, resembles Hemj)- 

 hillia, but its shell is much more developed, spiral, striate, and almost 

 capable of protecting, though not absolutely including, the animal 

 when contracted. 



iShiqmlojjsis is described with costate jaw, but has highly developed, 

 decidedly spiral shell. 



Finally, from all the above-mentioned genera, and from all known 

 sublimaciform genera, our genus is at once distinguished by the pe- 

 culiar hump-like process on the tail, reminding one of the caudal pro- 

 cess in some of the genera of disintegrated Nanina.* 



Fig. 78 is drawn from a less contracted and larger specimen collected 



by Mr. Hemphill. 



Hcniphillia $;landulosa. 



Animal from 12 to 30™™ long (preserved in alcohol) ; color smoky 

 white, mottled with longitudinal, fig. 78. 



dark-brown blotches, running ob- 

 liquely from the edge of the mantle 

 to the foot, uniformly with the 

 coarse granulations, of which there 

 are about twenty-five on either side 

 of the animal. Caudal process Hemphuua gianduiosa. 



very large, triangular in profile, dark brown, with a few coarse gran- 

 ulations. 



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

 edges almost membranous, with prominent concentric lines of growth j 

 5mm \oug^ 3mm ^idc, lu & spccimcn of 12™'" length (Fig. 76). 



Semphillia glaiidulosa, Bland and W. G. Binney, Ann. Lye. Nat. Hist, of N. Y., x, 

 209, pi. ix, figs. 1, 3 (1872); Terr. Moll., v, 248. 



Tacoma, Puget Sound; Olympia, Wash. Terr., Astoria, Oreg., in the 

 Oregonian Eegion. 



The description is drawn from specimens preserved in alcohol, due 

 allowance for which fact must be made. They were collected at As- 

 toria, Oreg., by Mr. Henry Hemj)hill, to whom Mr. Bland and myself 

 dedicated the genus, in return for most valuable addition to our knowl- 

 edge of the land-shells of the Pacific coast. 



Jaw thick, low, wide, slightly arcuate, ends attenuated, blunt ', cut- 



*Mr. Hemphill informs mo that in the living animal this hump-like process is less 

 conspicuous than in specimens preserved in iilcobol. The shell is| central, aud much 

 broader thm the ^uini^il when i» motion. 



