PACIFIC COAST SPECIES. 



99 



in warmer seasons, its activity being checked only by extreme cold, 

 while it cannot bear continued drought. It not unfrequeutly drops 

 from the trees, &c. This slug grows to the length of 6 inches, but 

 shrinks to a third of that size in alcohol. Its surface is smooth, not 

 rugose, when alive, as represented in Dr. Binney's plate, and its color 

 is a pale yellowish olive, usually more or less blotched with black." 

 (Pac. E. R. Rep., p. 377.) 



- Jaw narrow, arcuate, dark horn or reddish ; anterior surface with 

 more than 15 coarse, crowded ribs, denticulating the concave margin 

 (Fig. 59). 



Lingual membrane, see p. 93. 



On Plate XII, Fig. C, Terr. Moll, Y, I have figured the genitalia 

 of A. Columbianus, which has a very large ovary, against fig. ci. 

 which the testicle lies, as in the following species. The 

 ovary is so large as to take up one-half of the entire vis- 

 ceral cavity, extending completely across the body, resting 

 on the floor of the cavity, its end recurved upwards so as 



Caudal pore of 



to rest upon the liver on the upper surface of the viscera. ^- coiumHanus. 

 The body of the animal externally is swollen by the large size of the 

 ovary. The oviduct is narrow, long, greatly convoluted, ending in an 

 extremely long, convoluted vagina. The genital bladder is oval, large, 

 with a short, stout duct. The vas deferens, unlike that of the following 

 form, is as usual in the land shells. It enters the penis at its summit, 

 opposite the retractor muscle. The sac of the penis is very stout, long, 

 cylindrical. The external orifice is described above. 

 The caudal mucus pore described on p. 95 is here figured. 



Ariolimax Californicus, J. G. Cooper. 



External characters resembling very nearly those of A. Golumbianus, 

 but differing in the genitalia. 



Ariolimax Californicus, J. G. Cooper, Proc.Acad. Nat. Sc. of Phila., 1872, 146, pi. iii, 

 fig. D, 1-3.— W. G. BiNNEY, Terr. Moll., v, 232. 



In the California Province, around San Francisco, and in the Sierra 

 Nevada (latitude ^^^ ^2 



390) of the eleva- 

 tion of 3,500 feet. 



Jaw, see p. 93. 



The lingual 

 membrane (Plate 



V. Fig. F Terr ^' GaUfomxeus^ cpntracted in spirits, 



