504 



PROCEEDINGS OF THE ACADEMY OF 



[Nov., 



is attached to the epiphallus, but sends down a band to the apex 

 of the penis. The vas deferens (vd.) is very long and free. The 

 vagina is short. Spermatheca (sp.) is not distinctly divided into 

 head and duct. The distal two-thirds or more is of about equal 

 caliber, and distinctly varicose or sacculated. The proximal portion 

 is a little contracted. This form of spermatheca is special to the 

 Huachucan species, and unlike those of other districts. The other 

 organs show no peculiar features. The dimensions of the organs in 

 millimeters are as follows : 



Species. 



A.angigijra, Ramsey Cn 



A.angigi/ra, east fork I 

 Salvation I 



A. bifurca, Tanner Cn s 



A . ursina < 



A. ursina, Bear Cn 



A. heterodonta, Cave Creek 



A. microdonta, Cave Creek 



A. varicifera, Wickersham J 

 Rock I 



Penis. 



6 

 5 



5 



4. 



7 



8 



5 



7 



8 



7. 



6 



Epip- 

 hallus 



and 

 flagel- 



lum . 



24 

 28 

 28 

 34 

 31 

 42 

 43 

 46 

 34 

 40 

 35 

 29 



Flagel- 

 lum. 



1.3 



1.5 



1.5 



1 

 1.5 



1.8 



Va- 

 gina. 



I 



3 



4.5 



4 



4 



4 



3.5 



4 



5 



7.5 



5 



4 



Sperm- Diam 

 atheca 

 and 



duct . 



22 



22.5) 

 21 ) 

 29 1 



28 

 26 

 32 

 24 

 26 

 27 

 25 



of 

 shell. 



13-14 



15 



16-18 



16 

 16 

 19 



18 

 17 



Mu- 

 seum 

 No. 



83,269 

 94,396 



94,388 



94,351 



94,349 

 94,350 

 94,347 

 94,340 

 94,341 



All the specimens were measured from alcoholic preparations except 

 A. levettei ursina, 94,349, which was dissected fresh. 



The figures on plate XX represent the following species : 



A. levettei ursina, No. 94,351, head of Bear Canyon (pi. XX, fig. 1). 



A. levettei ursina, No. 94,349, head of Bear Canyon (pi. XX, fig. 4). 

 Atrium protruding. 



A, I. angigyra, No. 83,269, Ramsey Canyon; type lot (pi. XX, fig. 2). 



A. I. heterodonta, No. 94,350, head of Cave Creek. 



A. microdonta, No. 94,347, head of Cave Creek; type lot (pi. XX, 



fig. 7). 

 A. varicifera, No. 94,340 and 94,341, Miller Peak, Ash Canyon side 



(pi. XX, fig. 3). Atrium protruding. Fig. 6, the penis opened. 



Fig. 5, spermatheca of another individual. 



