. Land snails from Hawaii, Christmas island, and Samoa. Snails; Mollusks; Mollusks; Mollusks. Pilshry, Cooke, Neal—Snails from Hawaii, Christmas, Samoa 11 ANATOMY The mouth of an average specimen of Partula zehrina measures extern- ally slightly less than 2 mm. in its longest diameter. Back of the mouth is the buccal mass, which consists of a rather solid series of muscles for work- ing the jaw and radula. Attached to the upper portion of the buccal mass is the esophagus, a long, rather slender tube leading to the crop or stomach. The esophagus is from .75 mm. to mm. in diameter. Shells h
. Land snails from Hawaii, Christmas island, and Samoa. Snails; Mollusks; Mollusks; Mollusks. Pilshry, Cooke, Neal—Snails from Hawaii, Christmas, Samoa 11 ANATOMY The mouth of an average specimen of Partula zehrina measures extern- ally slightly less than 2 mm. in its longest diameter. Back of the mouth is the buccal mass, which consists of a rather solid series of muscles for work- ing the jaw and radula. Attached to the upper portion of the buccal mass is the esophagus, a long, rather slender tube leading to the crop or stomach. The esophagus is from .75 mm. to mm. in diameter. Shells have been taken from the stomach of a P. zehrina measuring 7 mm. in diameter. That individuals swallowing shells must be put to a great deal of inconvenience is to be assumed, since the diameter of a shell may be from seven to ten times that of the esophagus. (See fig. 2, a, b, c, and ^.). Figure 2.—Partula zehrina, showing shells swallowed and mouth: a, Partula zehrina Gould, lower surface of the animal, showing mouth and fore end of foot; h, buccal mass of the same individual dissected out, showing esophagus, e. = eso- phagus, p. r. = pharyngeal retractor; c, specimen of Aphanoconia fulgora Gould taken from the stomach of the same individual, dashes represent where the shell was eroded; d, another individual with the buccal mass extruded, e. = esophagus, 1. = lip, m. = mantle, t. = tentacle, dashes represent the position of the buccal mass; e, specimen of Opeas taken from the stomach of a third individual. (All figures drawn with the same magnification.). Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Pilsbry, Henry Augustus, b. 1862; Cooke, Charles Montague, 1874-; Neal, Marie C. (Marie Catharine), 1889-. Honolulu, Hawaii : The Museum
Size: 1782px × 1402px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorp, bookcentury1900, bookdecade1920, booksubjectmollusks
