THE NAUTILUS. 99 



pressed suture, by having a much smaller embryonic whorl, a 

 more transversely lengthened aperture with shorter parietal 

 callus ; and by the more arched and more reflexed upper 

 margin of the peristome. As the original description was rather 

 brief and unillustrated, figures of the type are now given. 



S. lioderma was collected by Gabb. It was one of the speci- 

 mens formerly in the tray with his type of H. lohrii, and pre- 

 sumably was found in the same district. The type is No. 58107 

 A. N. S. P. I cannot identify it with any of the species de- 

 scribed by Mabille. 



The following species evidently belong to the group of S. lohrii, 

 since all are described as " broadly and perviously umbilicate" . 

 Their other chief characters are given below, abbreviated from 

 Mabille' s descriptions, as the original publication is probably 

 not accessible to many West Coast conchologists. None of 

 them were figured, and no comparisons with other species are 

 given. 



Helix indigena J. Mabille. Depressed-subdiscoidal, solid, 

 subpellucid, somewhat glossy, above planulate, reddish-corneous 

 with a brown zone bordered by white zones, white beneath ; 

 beautifully rib-striate ; apex obtuse, minute, striate ; whorls 5, 

 the last rounded, descending a little to the aperture ; base a 

 little inflated, especially around the umbilicus. Peristome a 

 little dilated, scarcely reflexed, the margins converging, joined 

 by a scarcely noticeable callus. Diam. 19 to 21, alt. 7 to 8 mm. 

 Only found above 800 meters on the peaks of the Sierra, through- 

 out most of the central part of the Peninsula of California (Bul- 

 letin de la Societe" Philomathique de Paris, 8th Ser., vii, 1895, 

 p. 64). 



This seems from the description to be a distinct species, dif- 

 fering from S. lioderma by the sculpture and the less developed 

 peristome. 



Helix steganella J. Mabille. Depressed, destitute of color and 

 cuticle but with a reddish zone, rather thick, solid ; irregularly 

 striate, and densely covered with many minute granules arranged 

 in oblique series. Spire slightly prominent, the apex costulate, 

 obtuse. Whorls 4, the last strongly dilated and shortly de- 

 scending at the aperture, a little excavated above at the suture, 

 obscurely angular at the periphery, slopingly compressed below 

 the periphery, inflated around the umbilicus. Peristome thick- 

 ened, spreading, a little reflexed, the converging margins joined 



