1910.] 



NATURAL SCIENCES OF PHILADELPHIA. 



109 



A new figure is given, pi. X, fig. 6, representing a specimen from Cave 

 Creek near Reed's Mountain, No. 87,020. The penial retractor 

 muscle is longer than in A. proxima and its allies. 



Ashmunella ferrissi Pils. Fig. 22. 



A. ferrissi Pils. Proc. A. N. S. Phila., 1905, p. 247, pi. 16, figs. 108-110, 113. 

 The type locality is in the talus at the foot of Reed's Mountain, at 

 Station 11, about a half mile below Reed's house, where it is found 

 with A. chiricah nana, Sonorella virilis, etc. Additional specimens 

 were taken here in 1906. The figures represent an elevated and a 

 depressed specimen. 



Fig. 22. — Ashmunella ferrissi, Cave Creek, Station 11 (topotypes). 



The embryonic shell seems to comprise the first If whorls. The 

 initial half whorl is smooth and glossy ; then growth-striae begin below 

 the suture, gradually extending over the whole width of the whorl. 

 The third and fourth whorls are very minutely indistinctly marked 

 with subregularly arranged points, as though hairy in the immature 

 stage, though none taken retain any hairs. The rest of the whorls are 

 finely striate. The base also is marked with very fine, unequal growth- 

 striae, and under a strong lens shows faint, extremely fine and close 

 spiral striae. These are also faintly visible in places on the upper 

 surface. The carina first appears above the suture at the end of the 

 second whorl in some examples, in others at the end of the third. 



There is considerable variation in size and degree of elevation. 

 Three of the specimens taken in 1906 at the type locality measure: 



Alt. 6.2, diam. 12.5 mm. 

 " 5.2, " 11.8 " 

 " 5.6, " 10.6 " 



The punctation of the early neanic whorls, not noticed when the 



