. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology; Zoology. 3(t2 TERRESTRIAL AIR-BREATHING MOLLUSKS. Fig. 243. has a side cutting point; the twentieth tooth has its inner cutting point split; the outer cutting point of the marginals is very rarely bifid. The genitalia of a Catalina Island specimen is figured (PI. XTII. Fig. D). The ovary is light yellow. The oviduct is white. The genital bladder is light yellow. The prostate is large and yellow. The whole genital system is long and narrow. The genital bladder is small, globular, on an extremely long and delicate duct
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology; Zoology. 3(t2 TERRESTRIAL AIR-BREATHING MOLLUSKS. Fig. 243. has a side cutting point; the twentieth tooth has its inner cutting point split; the outer cutting point of the marginals is very rarely bifid. The genitalia of a Catalina Island specimen is figured (PI. XTII. Fig. D). The ovary is light yellow. The oviduct is white. The genital bladder is light yellow. The prostate is large and yellow. The whole genital system is long and narrow. The genital bladder is small, globular, on an extremely long and delicate duct which enters the vagina at its upper end. The duct just be- low the bladder receives a branch duct, very long, flagellate, three times the diameter of the duct itself. The penis sac is long, stout, cylindrical, tapering towards its apex and prolonged into a very long delicate flagellum. The vas deferens enters at the point where the flageHum commences. The retractor muscle is inserted half-way between the vagina and the entrance of the vas deferens. Opposite the mouth of the penis sac is a small sac-like organ, prob- ably a dart sac or vaginal prostate. As stated below, this arrangement of the genitalia differs somewhat from that of Slearnsiana. Arionta Stearnsiana, Gabr. Shell narrowly umbilicated, subglobose, solid, of a dirty white color, irregularly mottled with crowded ashy blotches, grouped into re- volving series below, with a decided wide, brownish revolving band above; with delicate oblicjue incre- mental strise, unequally cut by revolving lines; spire elevated; whorls 5, rather convex; aperture oblique, semicircular; peristome simplt), acute, its columellar termination white, ex})anded, reflected over the half- concealed umbilicus. Greater diameter 22, lesser 17 mill.; height, 12 mill. Helix SUamsiana, Gabb, Am. Journ. Conch., III. 235, PL XVI. Fig. 1 (1867). —\V. G. Binney, L. & Sh., L 177, Fig. 310 (1869). —Fischer and Crosse, MolL Mex. et Guat, 248, P
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Keywords: ., bookauthorha, bookcentury1800, bookdecade1860, booksubjectzoology
