. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology; Zoology. STENOTREMA. 293 Stenotrema Edgarianum, Lea, Shell imperforate, lenticular, carinated, solid, arcuatcly striate, under the epidermis yellowish flesh-color, with distant, short, prostrate hairs; spire con- vex-conoid, rather obtuse; whorls 5, flattened, the last ante- riorly deflected, subconstricted; aperture very oblique, most ^^' narrowly ear-shaped, narrowed by a stout, tongue-shaped, arcuatcly entering tooth on the full length of the parietal wall; peristome subcontinuous, its upper margin subsimple, its b
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology; Zoology. STENOTREMA. 293 Stenotrema Edgarianum, Lea, Shell imperforate, lenticular, carinated, solid, arcuatcly striate, under the epidermis yellowish flesh-color, with distant, short, prostrate hairs; spire con- vex-conoid, rather obtuse; whorls 5, flattened, the last ante- riorly deflected, subconstricted; aperture very oblique, most ^^' narrowly ear-shaped, narrowed by a stout, tongue-shaped, arcuatcly entering tooth on the full length of the parietal wall; peristome subcontinuous, its upper margin subsimple, its basal margin much dilated inwardly, with a slight median cleft; far within on the base of the shell is a stout, transverse tuber- s. Edgarianum, cle. Greater diameter 9, lesser 8 mill.; height, 5 mill. enlarged. Caracolla Edgariana, Lea, Trans. Am. Phil. Soc, IX. 2 ; Obs., IV. 2 (1843) ; Proc, II. 31 (1841) ; in Troschel's Arch. f. Nat., 1843, 11. 124. Helix Edgariana, Pfeiffer, Mon. Heh Viv., I. 425. —BiNNEY,Terr. Moll., II, 155, PL XLIV. Fig. 2.—Reeve, Con. Icon., 703. — W. G. Binney, Terr. Moll., IV. 65 ; L. & , Sh., I. 114 (1869). — Bland, Ann. N. Y. Lye, VII. 428, PI. IV. Fig. 18. Stenotrema Edgariana, Tryon, Am. Journ. Conch., III. 59 (1867). Distribution like S. lahrosum. S. Edgarianum differs from spinosum in the following particulars: it is smaller, more elevated, and more convex beneath. In form the parietal tooth is most like that of stenotremum, while that of spinosum is more nearly allied to that usually prevailing in hirsutum. The whorls of spinosum are flattened and ex- serted, the carinated edges of all being seen, but in Edgarianum the upper whorls are rather convex, and defined by a well-marked suture. Traces of hairs rarely exist at the base of spinosum, and no scars indicating their presence are visible on dead or denuded shells, whereas in Edgarianum there are distant, short, prostrate hairs, with strongly marked scars on the shell. Fresh o
Size: 1657px × 1508px
Photo credit: © Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorha, bookcentury1800, bookdecade1860, booksubjectzoology
