1914.] 



NATURAL SCIENCES OF PHILADELPHIA. 



367 



MONTANA SHELLS. 



BY E. G. VANATTA. 



■ 



Mr. L. E. Daniels collected the following species of shells in the 

 Bitter Root Mountains, Montana: 



Hemphillia danielsi n- s-p. Figs. 1, 2. 



Animal sluglike, with the shell partly exposed, and the mantle 

 elevated into a visceral hump, as usual in this genus. The color 

 in formaline is yellowish-gray with bluish-black markings, but in 

 alcohol it is white with black maculations. The shell pore is about 

 I the length of the mantle. The posterior part of the foot is narrow, 

 with a dorsal median groove and a tail pore. The ovo-testis, fig. 2, 

 has a grayish color with black pigment where the ends of the follicles 



are in contact; albumen gland is yellow; thevas deferens is narrow, 

 enlarged near the uterus; epiphallus long, narrow, and coiled where 

 it joins the vas deferens, and at the insertion of the penis retractor 

 which is as usual attached to the retensor muscle; penis long, conical, 

 tapering towards the atrium, where there is a broad gland; penis 

 papilla short and conical; spermatheca globular on a broad duct 

 which is attached to the body wall in its lower part. Length 34 mm. 

 Types in the collection of the Academy of Natural Sciences 110,052, 

 from Camas Creek in the Bitter Root Mountains, Montana, collected 

 by Mr. L. E. Daniels, in whose honor I take pleasure in naming 

 the species. Another specimen used to figure the external form is 

 from Medicine Hot Springs, Mont. 



