. Land snails from Hawaii, Christmas island, and Samoa. Snails; Mollusks; Mollusks; Mollusks. Pilsbry, Cooke, Ned—Snails from Hawaii, Christmas, Samoa 35 tentacular muscles, length of penis, length of appendix, diameter of prostate gland, and distance of beginning of spermatheca duct from the angle the oviduct makes with the penis. To all specimens examined the following statements apply: 1. In sinistral snails the genital pore was on the left, and the left tentacle passed between the penis and oviduct. The reverse was true in dextral snails. (No abnormally sinistral or dextral snails were dis
. Land snails from Hawaii, Christmas island, and Samoa. Snails; Mollusks; Mollusks; Mollusks. Pilsbry, Cooke, Ned—Snails from Hawaii, Christmas, Samoa 35 tentacular muscles, length of penis, length of appendix, diameter of prostate gland, and distance of beginning of spermatheca duct from the angle the oviduct makes with the penis. To all specimens examined the following statements apply: 1. In sinistral snails the genital pore was on the left, and the left tentacle passed between the penis and oviduct. The reverse was true in dextral snails. (No abnormally sinistral or dextral snails were dissected.) 2. Contraction of an animal into itself did not cause different measure- ments in organs from those of fully expanded animals. 3. The organs of pregnant specimens did not have different measure- ments from those of well-developed adults. 4. Each juvenile snail, with at least two whorls less than the adults, had proportionately to the size of the animal a much smaller prostate gland, much shorter appendix and penis (a condition that led to the investigation described on pages 44-49).. Figure 11.—a, Partulina redfieldii (Newcomb), pallia! organs and alimentary tract, a. == anus, fl. r. =» fleshy ridge, int. = intestine, k. = kidney, 1. = lung, per. = peri- cardium, pul. V. = pulmonary vein, u. = ureter; h, Partulina homeri (Baldwin), pallial organs and alimentary tract (incompletely stretched) ; c, Partulina virgulata (Mighels), pallial organs and alimentary tract; d, Partulina mauiensis (Pfeiffer), pallial organs and alimentary tract. The shape of the kidney varies slightly in width in all sections of Achatinella and Partulina, some species of different genera agreeing more closely than species of the same genus. (See figs. 11, 12.) In Newcombia the kidney was distinctly proportionately shorter. (See fig. 12, a.) The lengths of attachment of two free muscles, buccal and tentacular, varied somewhat but overlapped in different species, depending on amount of contract
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Keywords: ., bookauthorp, bookcentury1900, bookdecade1920, booksubjectmollusks
