. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. ARIOLIMAX. 233 Ariolimax Calif amicus, J. G. Cooper, Proc. Acad. Nat, Sc. of Phila., 1872, 146, PL III. Fig. D, 1-3. In the California Province, around San Francisco, and in the Sierra Nevada (latitude 39°) of the elevation of 3,500 feet. Fig. A. Californicus, contracted in spirits. Jaw (see p. 227). The lingual membrane (PL V. Fig. F) has the same type of dentition as in A. Columbianus, but the bases of attachment are more developed, and are pro- duced beyond the reflection at their upper margin. There are 80—1
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. ARIOLIMAX. 233 Ariolimax Calif amicus, J. G. Cooper, Proc. Acad. Nat, Sc. of Phila., 1872, 146, PL III. Fig. D, 1-3. In the California Province, around San Francisco, and in the Sierra Nevada (latitude 39°) of the elevation of 3,500 feet. Fig. A. Californicus, contracted in spirits. Jaw (see p. 227). The lingual membrane (PL V. Fig. F) has the same type of dentition as in A. Columbianus, but the bases of attachment are more developed, and are pro- duced beyond the reflection at their upper margin. There are 80—1—80 teeth, with 9 perfect laterals. The genital system of A. Californicus is figured in D of PL XII. 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 posi- tion of the testicle is different from that of most slugs, and affords an ex- cellent specific character. The testicle is kidney-shaped, as it is covered by its investing membrane. It appears to consist of closely bound fasciculi of short, white, tubular, not aciniform caeca. The epididymis is short, and still more shortened by its excessive convolution. The accessory gland is partially imbedded in the ovary. The ovary is large and distinctly lobulated. The ovi- duct is narrow, very long, greatly convoluted. The genital bladder is oval, large, with a short, stout duct. The penis is enclosed in a long tapering sac, termi- nating 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 cham- ber. It joins the penis at the commencement of the 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 r
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