ARIOLIMAX. 



235 



Fig. 134. 



A. Hemphilli, contracted in spirits. 



Ariolimax HemphillL 



From 25 to 31 mill, long, of a transparent flesh-color, much more slender 

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

 is also longer. 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; 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 vagina is greatly swollen. 



Ariolimax Hemphilli, W. 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, ColumUanus, 

 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 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. 



Ariolimax Andersoni, J. G. COOPER. 



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

 the mountains of Alameda County, California. From the fact of the reticula- 

 tions of the surface of the animal havinr the 



O 



foliated appearance noticed in Arion folio- 



lalus, Gld., Prophysaon Hemplii/li, Bl. & 



Binn., and Arion Andertoni, 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 may be identical. 1 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. II. 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. 



Fig. 135. 



A. Andersoni, contracted in spirits. 



