. Land snails from Hawaii, Christmas island, and Samoa. Snails; Mollusks; Mollusks; Mollusks. Pilshry, Cooke, Neal—Snails from Hawaii, Christmas, Samoa 23 The penis differs considerably in the two species under discussion. That of H. marsupialis is long and slender and is ordinarily folded two to three times. The two specimens figured measured approximately by mm. and by mm. (See fig. 6, a,b.) A third specimen, carefully pinned out, measured 14 mm. in length. In Specimen B (the more characteristic of the two figured specimens) from the point where the vas deferens enters it,
. Land snails from Hawaii, Christmas island, and Samoa. Snails; Mollusks; Mollusks; Mollusks. Pilshry, Cooke, Neal—Snails from Hawaii, Christmas, Samoa 23 The penis differs considerably in the two species under discussion. That of H. marsupialis is long and slender and is ordinarily folded two to three times. The two specimens figured measured approximately by mm. and by mm. (See fig. 6, a,b.) A third specimen, carefully pinned out, measured 14 mm. in length. In Specimen B (the more characteristic of the two figured specimens) from the point where the vas deferens enters it, the penis tapers gradually towards its distal end, where the penis retractor is attached. Below the entrance of the vas deferens the penis has an almost. Figure 6.—Bndodonta marsupialis Pilsbry and Vanatta: a, b, reproductive organs, alb. = albumen gland, h. == hermaphrodite duct, o. d. = oviduct, p. = penis, prst. = prostate gland, p. r. = penis retractor, sp. = spermatheca, sp. d. = spermatheca duct, t. = talon, V. d. = vas deferens; c, marginal teeth, 14-19, greatly magnified. uniform diameter to a point directly above the genital pore, where it narrows gradually. The vas deferens enters the penis about mm. from its distal end. In cross section the penes show an internal formation of pilasters similar to those of E. lamellosa. In form and size the penis of B. mar- supialis approaches closer to B. fricki than to E. lamellosa. It differs, how- ever, from E. fricki in that the vas deferens enters the penis at a propor- tionately greater distance from its distal end. The tooth formula of the radula of E. marsupialis differs slightly from that of E, lamellosa. Three radulae have the following formulas: 1-5-18, 1-5-17, and 1-5-20. All three radulae of E. marsupialis examined have five laterals; v/hile E. lamellosa has four. The centrals and laterals are both characterized by rather wide basal plates. From the fourteenth to the seventeenth marginals the cusps are more numer
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Keywords: ., bookauthorp, bookcentury1900, bookdecade1920, booksubjectmollusks
