102 A MANUAL OF AMERICAN LAND SHELLS. 



stout sac, which has a bulb -like swelling at its upper extremity, where 

 the vas deferens enters. The latter organ has nothing of peculiar in- 

 terest. A vaginal prostate, or perhaps dart sac, is shown in jp, g. The 

 external orifice is described above. 



Ariolimax Hemphilli. 



From 25 to 31™°* long, of a transparent flesh-color, much more slender 



than the other known species, with a much more pointed tail. The 



Pic 65. mantle is also longer. These characters, 



even in specimens preserved in alcohol, 



readily distinguish the species. On dissect- 



A. Hemphilli, contracted in spirits. 



ing the specimens, I also found distinguishing 

 specific characters in the genitalia (Plate XII, Fig. G, Terr. Moll., Y). 

 The testicle, imbedded in the liver, is brown, composed of thickly packed 

 fasciculi of long, blunt caeca ; the mass formed by them is cuneiform. 

 The ovary is narrow and pointed. The genital bladder is small, oval, 

 with a short, narrow duct, which becomes much more swollen at its 

 junction with the vagina. The penis sac is extremely short, globular, 

 receiving the vas deferens at its upper posterior portion and the retractor 

 muscle at its farther end. Opposite the mouth of the penis sac the va- 

 gina is greatly swollen. 



Arioliviax Hemphilli, W. G. BiNNEY, Ann. Lye. of Nat. Hist, of N. Y., xi, 181, pi. xii, 

 fig. 7 (1875) ; Terr. Moll., v, 235. 



A species of the Californian Province, found at Mies Station, Ala- 

 meda County, California. 



A comparison with my figures of the genitalia of A. Andersoni^ Colum- 

 bianus, Californicus, and niger will show how widely they differ from 

 those of the present species. 



The jaw is thick, low, wide, slightly arcuate, ends scarcely attenu- 

 ated; anterior surface with 8-12 decided ribs, denticulating either 

 margin. 



*Lingual membrane (Plate V, Fig. H, Terr. Moll., V) as usual in the 

 genus. Teeth, 31-1-31. 



Ariolimax Andersoni, J. G. Cooper 

 Fig. 66. ■ 



A. Andersoni, contracted in spirit.s. 



From Dr. L. G. Yates I have received speci- 

 mens of au Ariolimax found in the mountains 

 of Alameda County, California. From the 

 fact of the reticulations of the surface of the 

 animal havingthe foliated appearance noticed 



