ARIOLIMAX. 



235 



Fig. 134. 



A. Hemphilli, contracted in spirits. 



Ariolimax HemphillL 



From 25 to 81 mill, lonj:^, of a transparent flosh-color, much more slcnflcr 

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

 is also lonwr. These characters, even in 

 specimens preserved in alcohol, readily dis- 

 tinguish the species. On dissecting the 

 specimens, I also found distinguishing spe- 

 cific characters in the genitalia (PI. XII. 

 Fig. G). The testicle, imhedded 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 vagina is greatly swollen. 



Ariolimax Hemphilli, "VV. G. Binney, Ann. Lye. of Nat. Hist, of N". Y., XI. 

 181, PI. XII. Fig. 7 (1875). 



A comparison with my [figures of the genitalia of A. Andersoni, Columhianus, 

 Californicus^ and nigei' will show how widely they differ from those of the 

 present species. 



The jaw is thick, low, wide, slightly arcuate, ends scarcely attenuated; an- 

 terior surface with 8-12 decided ribs, denticulating either margin. 



Lingual membrane (PI. V. Fig. H) as usual in the genus. Teeth, 31 — 1 — 31. 



A species of the Californian Province, found at Niles Station, Alameda 

 County, California. 



From the fact of the reticula- 



Fig. 135. 



Ariolimax Anderson!, J. G. Cooper. 



From Mr. L. G. Yates I have received specimens of an Ariolimax found in 

 the mountains of Alameda County, California, 

 tions of the surface of the animal having the 

 foliated appearance noticed in Arion folio- 

 latus, Gld., Prophysaon Hemphilli, Bl. & 

 Binn., and Arion Andersoni, J. G. C, I am 

 inclined to refer the specimens to one of 

 those species. I am entirely unacquainted 

 with the first (see Ann. N. Y. Lye. N. H., 

 X. 297), the second is generally distinct, the latter maybe identical.^ The 

 specimens have all the characters of Ariolimax. They are about 35 mill. long. 



1 I have lately received from Dr. Cooper, under the name of Arion Andersoni, speci- 

 mens agreeing perfectly with the form of Prophysaon referred to as probably undescribed 

 on p. 296, and PI. XIII. Fig. 5, of Ann. of Lye. of N. H. of N. Y., Vol. X. Should Dr. 

 Cooper's Arion Andersoni prove, therefore, to be a Prophysaon, it will retain its specific 

 name, while the slug before us may also retain the specific name Andersoni. See p. 239. 



A. Andersoni, contracted in spirits. 



