140 PROCEEDINGS OF THE ACADEMY OF [May, 



base of the dart sack, the duct of a mucous gland arises. Each diict 

 ascends and expands into a bulb, then is contracted, recurved upon 

 itself, descending, becoming flattened in form of a long, thin-walled 

 gland adhering to the vagina. For the sake of distinctness, these 

 glands and their ducts are shaded in the figures. As usual in the 

 genus, one of the mucous glands rises high over the dart sack, the 

 other being lower, and concealed behind the dart sack in the left 

 hand figure. The spermatheca has an extremely long, thin duct, 

 which bears a long, slender diverticulum. The specimens did not 

 pull well, and the upper part of the oviduct, the albumen gland, sper- 

 matheca and ovotestis were broken off. 



Length of penis 6.5 mm. 



'' " epiphallus 5 " 



" " flagellum 7 



" " vagina 7 " 



" "dart sack 3 



Doctor Rixford writes as follows: "About the first of March I 

 spent a few days at Palm Springs, Cal., on the eastern edge of San 

 Jacinto Mountain, and had opportunity to get a few snails. I 

 found only the one variety and no other shells except a small Physa 

 which I take to be a common Physa of the West Coast. The Helix 

 I have not been able to identify. Judging by the number of dead 

 shells, it must be very nmnerous in that region, but because it had 

 rained shortly before mj' visit the live shells were much scattered, 

 having left their summer quarters. On the under surfaces of rocks 

 I found markings of large colonies. In this region the rainfall is 

 only an inch or so a year and the summer temperature much above 

 100 F. The rocks arc granitic." 



