32 THK NAUTILUS. 



Sonorella granulatissima n. sp. 



Shell depressed, in general shape much like jS. hachitana and S, 

 rowelli ; narrowly umbilicate, the umbilicus between one-eighth and 

 one-ninth the diameter of the shell ; pale corneous-brown, becoming 

 somewhat whitish around the umbilicus, with a conspicuous red- 

 brown band above the periphery, and an inconspicuous, ill-defined, 

 faint and wide one below the suture on tlie last whorl. Surface 

 lustrous to the naked eye, but not glossy, under a strong lens seen ta 

 be i^ery densely and evenly gramdose, the granulation extending to 

 the apex, but becoming more effaced on the base, subobsolete around 

 the umbilicus, where some specimens show faint spiral lines. Spire 

 very low. Whorls hardly 4^, rather slowly widening at first, the 

 last whorl very much wider, gradually and rather deeply descending 

 in front, far below the periphery of the shell. Aperture very 

 oblique, very shortly elliptical, almost circular, the peristome thin, 

 narrowly expanded, the columellar margin dilated, ends approaching, 



Alt. 10, diam. 19 mm.; oblique alt. apert. 9.7, width 11 mm. 



Alt. 9.8, diam. 18 mm.; oblique alt. apert. 8.5, width 9.8 mm. 



Huachuca Mts., Arizona; collected by Mr. Jas. H. Ferriss. 



The umbilicus is narrower than in *S'. hachitana and S. rowelli, 

 and it differs from both in the dense granulation. It is a species of 

 delicate beauty, evidently distinct from any form collected by 

 Ashmun and others in the same region. 



Sonorella rowelli Newc, originally described from Arizona, was 

 taken by Mr. Ferriss at Sanford, and in the Patagonia Mts. Mr. 

 Ashmun also brought the species from the latter locality, and Dr. 

 Geo. H. Horn collected a specimen at Fort Grant, Arizona. It is 

 much like aS'. hachitana in miniature. 



Mr. Binney rejected rowelli from the U. S. list because he 

 considered it identical with Helix lohrii of Gabb from near Moleje, 

 Lower California ; but the two species are clearly distinct, and there 

 seems to be no sufficient reason to doubt the truth of the original 

 statement that the type of rowelli was taken by Frick in Arizona. 



Bulimulus dealbatus pasonis n. subsp. 



Much more slender and smaller than any described form of 

 dealbatus, schiedeanus or mooreanus, but larger and stouter than B. 

 durangoanus v. Mart. Reddish-corneous, with opaque white streaks 

 and mottling ; smoothish. Whorls nearly 6, quite convex. Aper- 



