100 A MANUAL OF AMERICAN LAND SHELLS. 



Moll., V) has the same type of dentition as in A. GolumManus, but the 

 bases of attachment are more developed, and are produced beyond the 

 reflection at their upper margin. There are 80-1-80 teeth, with 9 per- 

 fect laterals. 



The genital system of A. Calif ornicus is figured in D of Plate XII, 

 T. M., y. The testicle does not lie far away, imbedded in or resting on 

 the upper lobes of the liver, but lies close against the ovary, in the 

 semicircle formed by the recurving of the apex of the ovary upon itself. 

 In this respect the position of the testicle is different from that of most 

 slugs, and affords an excellent specific character. The testicle is kid- 

 ney-shaped, as it is covered by its investing membrane. It appears to 

 consist of closely bound fasciculi of short,-white, tubular, not aciniform 

 cseca. The epididymis is short, and still more shortened by its exces- 

 sive convolution. The accessory gland is partially imbedded in the 

 ovary. The ovary is large and distinctly lobulated. The oviduct is nar- 

 row, very long, greatly convoluted. The genital bladder is oval, large, 

 with a short, stout duct. The penis is inclosed in a long, tapering sac, 

 terminating in a decided flagellum, in which I detected no capreolus. 

 On the end of the flagellum is a large, globular bulb. The retractor 

 muscle of the penis is attached to the roof of the general visceral cavity, 

 below the pulmonary chamber. It joins the penis at the commence- 

 riG. 63. ^^^^^ ^^ *^^ flagellum. The vas deferens is peculiar. It leaves 

 the prostate gland as usual, runs alongside of the vagina to 

 the base of the penis, thence runs upwards, swelling to an 

 enormous extent, so as to equal the breadth of the penis, then 

 again becomes gradually reduced to its former size, until, as 

 the most delicate thread, it enters the penis at the end of the 

 ormcia. f^.^„^^^^^ bclow the bulb. The penis sac did not appear in the 

 animal extended as drawn in the plate, but was twice recurved upon 

 itself. There is also a vaginal prostate, large, ear-shaped, close to the 

 exterior orifice of the female organs, which, with that of the male, is 

 described above (p. 95.) 



For other anatomical details see pp. 96, 97 et aeq. The internal shelly 

 plate there described is here figured. 



Ariolimax nig^er, J. G. Cooper. 



Body long and narrow, blunt before, but little attenuated, and 

 bluntly truncated behind, with the termination of the bod;y uot arched 



