MUSEUM OF COMPARATKE ZOOLOGY. 171 



Patula strigosa, Gould, var. Buttoni, Hemphill. 

 Plate I. Figs. 8 and 10. 



I figure the typical and the toothed forms. See 3d SuppL, p. 220. 



Patula strigosa, Gould, var. albofasciata, Hemphill. 

 Plate IV. Fig. 9. 



Shell globose, elevated or depressed ; whorls six, convex, with a broad white 

 band at tlie periphery, which shows just above the suture on two or three whorls 

 of the spire as it passes towards the summit or apex, separating two variable 

 chestnut-colored zones; the upper one in some specimens is often very dark, in 

 others very light passing into horn-color, and broken into blotches, stains, or 

 irregular lines, which pass up a few whorls of the spire and blend with the 

 horn-colored summit ; the lower zone spreads towards the umbilicus in irregular 

 stains, often beautifully clouding the base of the shell, or is often broken into 

 irregular revolving lines, and other varied patterns of coloring ; striae rib-like, 

 quite coarse in some specimens, in others finer and closely set together; aperture 

 circular, ovate, and occasionally pupaeform ; peristome simple, thickened, suL- 

 reflected at its junction with the columella, and partially covering the umbilicus, 

 the ends approached and often joined by a callus, the peristome sometimes bearing 

 a tooth-like process; umbilicus deep, moderately large, narrower in elevated and 

 broader in depressed specimens ; suture well defined. Greater diameter of the 

 largest specimen 17 mm., height, 12 mm.; greater diameter of the smallest 12 

 mm., height 7 mm. ; with all the intermediate sizes. 



Box Elder Co., Utah. 



Among leaves, brush, and grass, on limestone rock. Altitude, about 4,600 feet 

 above tlie sea. 



Tliis variety of strigosa is so very variable in all its characters I find it quite 

 difficult to draw a description that will cover all the individuals which I include in 

 it. I have given the measurements of the largest and smallest specimens, but there 

 are all the intermediates between those figures. 



The above is Mr. Hemphill's description. An authentic individual is figured 

 on the plate. 



Patula strigosa, Gould, var. subcarinata, Hemphill. 



Among the shells recently collected by Mr. Hemphill at Old Mis.^ion, Coeur 

 d'Alene, Idaho, was a marked variety of this species, for which Mr. Hemphill 

 suggests the name subcarinata. The specimens vary greatly in elevation of 

 the spire, and in the number and disposition of the revolving bands, often 

 quite wanting, as in the specimen fiffured in the Third Supplement. All have 

 a verj-- heavy shell, the body whorl of which has an obsolete carina which 

 is well marked at the aperture, modifying the peristome very decidedly. See 

 the fijnire. 



