. Bulletin - United States National Museum. Science. ^0 A MANUAL OF AMERICAN LAND SHELLS duct of the genital bladder enters at about its middle. The last-named organ is large, globular. The penis sac is small, short, cylindrical, ex- panded, and bulbous at its apex, where the vas deferens enters. I could detect no accessory organs in the single specimen imperfectly examined (Plate XI, Fig. F, Terr. Moll., V). The genitalia are some- what of the same type as those of , but the dentition of the latter is quite distinct (see below among locally introduced species). There is a still strong
. Bulletin - United States National Museum. Science. ^0 A MANUAL OF AMERICAN LAND SHELLS duct of the genital bladder enters at about its middle. The last-named organ is large, globular. The penis sac is small, short, cylindrical, ex- panded, and bulbous at its apex, where the vas deferens enters. I could detect no accessory organs in the single specimen imperfectly examined (Plate XI, Fig. F, Terr. Moll., V). The genitalia are some- what of the same type as those of , but the dentition of the latter is quite distinct (see below among locally introduced species). There is a still stronger resemblance to the genitalia of Amalia gagates as figured by Semper (Phil. Archip., Pla:e XI, Fig. 9), so far as the penis and genital bladder are concerned. Family HELICID^. ITIICROPIIYSA. (See below.) Microphysa Lansing:!, Bland. Shell imperforate, orbicular-depressed, shining, dark horn-colored, smooth above, at the base substriate; suture impressed; whorls 5^, rather convex, the last not descending, obsoletely angular at the periphery, more convex at the base, excavated around the umbilical region; aperture narrow, lunate; peristome acute, the right margin thickened within by an obsoletely denticulated lamella, columellar mar- gin scarcely reflected. Greater diameter scarcely 3, Fig. 55. lesscr 2^™°^, height If""". (Bland.) OZonites Lansingi, Bland, Aun. Lye. Nat. Hist of N. Y. xi, 74, fig. 1, 2(1875). Microphysa Laimngi, W. G. Binn. T. M., ^, 169. In damp, moist places, among leaves. Astoria, Oreg., in the Oregonian Region. The aspect of the upper surface of the shell is very like that of Z. muUidentatus. The original figure is here given. Micro^h^mLansingi. Mr. Bland jjlaccs the spccics in Zonites, but owing to the character of the jaw, I am inclined to consider it a Microphysa. One specimen of Lansingi, appearing to have the animal within it, was crushed between two glass slides, enabling me, without the use of potash, satisfactorily to observe the j
Size: 1697px × 1472px
Photo credit: © Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorun, bookcentury1800, bookdecade1870, booksubjectscience
