1916.] NATURAL SCIENCES OF PHILADELPHIA. 323 



form, sculpture, color and size, as compared with average examples 

 from Colorado, with two strong color bands, one barely below the 

 periphery, the other well above. Probably all or nearly all of 

 Hemphill's Utah records of 0. strigosa (Gould) should be referred to 

 this subspecies. This is true of the material labelled strigosa in 

 Clapp's Hemphill collection. 



Oreohelix strigosa depressa, form tooelensis new form. 



This form differs from depressa chiefly in the color, which is almost 

 invariably a dead, chalky white, in all the material from three 

 colonies northeast of Tooele, Utah, giving the specimens the appear- 

 ance of dead, weathered shells, in this respect quite unlike the colonies 

 of depressa from southeast of Tooele and elsewhere. Shell depressed 

 (in a few examples quite elevated); whorls 5 to 5f, convex; suture 

 well impressed; spiral stria? minute; transverse sculpture slightly 

 less pronounced than in typical depressa, especially below; color 

 bands narrow, sometimes strongly marked, but usually rather faint 

 or wanting, one barely below and the other well above the periphery, 

 strong on immature examples; first embryonic whorl smooth, second 

 anil third minutely transversely striate, with numerous spiral stria? 

 rippling the transverse sculpture above and below and increasing in 

 strength with the growth of the whorls. Type, in the University 

 of Colorado Museum, greater diam. 19 mm., lesser 16.5 mm., alt. 

 11.5 mm. Co-type, in Academy of Natural Sciences of Philadelphia, 

 greater diam. 19.6 mm., lesser 17.2 mm., alt. 11.4 mm. Co-type, in 

 L. E. Daniels' collection, greater diam. 23 mm., lesser 20 mm., alt. 

 13.5 mm. This form also slightly differs from typical depressa in 

 anatomy, according to Dr. Pilsbry, but this is a variable feature. 

 The presence sporadically of white examples in depressa and other 

 colonies of Oreohelix belonging to the strigosa group, even though 

 not the dead white which characterizes this form, makes it inadvisable 

 to give this subspecific rank, notwithstanding the fact that the 

 color in these colonies is constant, unless other differences are found 

 which are also constant. Abundant at stations 7, 8, 9 and 10, in 

 the small gulches about six miles northeast of Tooele, north of the 

 smelter, under grass and other vegetation about limestone ledges. 

 Four sinistral specimens were found. 



Oreohelix haydeni gabbiana (Hemphill). PI. XVI, fig. 3. 



Patula strigosa var. gabbiana Hemphill, per Binnev, 2nd Suppl. to 5th 

 Vol. Terr. Moll. U. S., pp. 30, 34, PI. II, fig. 9, 1886. 



St a. 14, mountain side southwest of Garfield (southeast of Black 

 Rock) west side of Oquirrh Mts., under bushes, on limestone. The 



