Land Mollusca of North America (north of Mexico)/Family IV. Camaenidae

by Henry Augustus Pilsbry

Fig. 274. Genitalia of Humboldtiana ultima, with detail of branch of spermathecal duct above, and of under side of penis below at left; fl, flagellum.

Jaw (Fig. 265 d) has about four very low, wide ribs, feebly scalloping the cutting margin.

Radula (Fig. 267: 6). The central tooth is very much narrower than the laterals, with the cusp nearly as long as the basal plate. It is asymmetrical, the cusp bent towards the left in the radula examined. The mesocones of side teeth are mainly simple, only the short outer ones have an endocone indicated. The ectocone appears on about the 23d lateral and is simple on all of the marginal teeth. I count 47 side teeth. This radula is peculiar in the genus for its narrow centrals and the undivided ectocones of the marginals.

(Ultimus, the last—northward.)

Family IV. CAMAENIDAE

Epiphallophora Pilsbry, 1892, Proc. Acad. Nat. Sci. Phila., p. 397.

Epiphnllngana (Camaeninae) Pilsbry, 1895, Man. Conch., 9: xxxii; Index to Helices, p. 124.

Camaenidae Von Möllendorff, 1898. Abh. Naturf. Ges. Görlitz, 22: 90.

Pleurodontidae Von Ihering. 1912, Jour. Acad. Nat. Sci. Phila., (2), 15: 479.—Thiele, 1931, Handb. der Syst. Weichtierkunde, p. 676.