18 THE NAUTILUS. 



striped by two dark chestnut bands, one above and the other below 

 the periphery; suture well impressed; aperture oblique; lip simple, 

 thickened, umbilicus moderate, deep, partially covered by the re- 

 flected lip at the columella. 



Height of the largest specimen ^-^ inch, greatest diam. I inch, 

 lesser 4 inch. 



Habitat near Franklin, Idaho, among Red Sandstone. 



A very thin and almost transparent variety of the very variable 

 strigosa. By its peculiar shade, it is very evident that the animal 

 has drawn largely from the red sandstone for the material to build 

 its shell. 



NEW FORMS OF AMERICAN PUPID^. 



BY DR. v. STERKI. 



Pupa Californica, varieties, continued. 



4. From Monterey, Cal. In size not much different from the 

 type, yet a little smaller, and more generally obovate ; the striae are 

 less coarse; the peristome is slightly but distinctly expanded. 

 There is no superior palatal lamella, and the three present ones are 

 small, the columellar even a trace or wanting entirely. The form 

 may be named : var. tr'motata. 



5. From San Diego, Cal. The diminution of the lamellse is 

 going on ; none but the apertural is left in this variety — diegoensis 

 — and that even is quite small or a mere trace. In size and shape, 

 the examples are not much different from the Monterey form, which 

 is an intermediate one. In the relation of var. diegoensis and the 

 very distinct var. catalinaria, and also elongata on the neighboring 

 islands, there is a zoogeographical enigma, which may be solved in 

 connection with other facts. 



6. Irom Rocklin, Cal. (Placer Co. 25 Ms. N. E. of Sacramento.) 

 Large, conic or ovate conic, or turriculate, umbilicated, rib-like 

 striie rather strong ; whorls 5, well rounded, with deep suture, the 

 last occupying more than i altit. ; aperture subovate or nearly circu- 

 lar, margins much approximate and the ends protracted, peristome 

 shortly but decidedly expanded ; lamella one, apertural, small. Alt. 

 2, 5; diam. 1, 5 mill. For its size, rounded aperture and single 

 lamella I would name this form var. cyclops. It is with some doubt 



