. Cuvier's animal kingdom : arranged according to its organization. Animals. 352 MOLLUSCA. branous laminae to cover them in time of danger : and besides the two conoid tentacula in front, similar to those of Doris, they have four, or sometimes six others, which are simply pointed. The Tritonies {Tritonia, Cuv.),— Have a body, superior tentacula, and generative organs, as in the Doris ; but the anus and the vent of the pecuHar secretion are on the right side, behind the vulva : the arbuscular branchiae are arranged along each side of the back, and the mouth, guarded by broad membranous lips, is
. Cuvier's animal kingdom : arranged according to its organization. Animals. 352 MOLLUSCA. branous laminae to cover them in time of danger : and besides the two conoid tentacula in front, similar to those of Doris, they have four, or sometimes six others, which are simply pointed. The Tritonies {Tritonia, Cuv.),— Have a body, superior tentacula, and generative organs, as in the Doris ; but the anus and the vent of the pecuHar secretion are on the right side, behind the vulva : the arbuscular branchiae are arranged along each side of the back, and the mouth, guarded by broad membranous lips, is armed within with two lateral horny and cutting jaws, in shape somewhat like to the scissors for shearing sheep. We have a large species (Tnfonia Hombergn, Cuv.) on our coasts ; and there are many others, some of them very small, which exhibit great variety in the size and figure of their branchiae. [Melibea, Rang, ditters in having filiform simple tentacula issuing from a wide sheath, and two series of ovate muricated or tuberculated branchiae on tlie back, which readily fall off when the animal is handled. M. rosea, which lives on floating sea-weeds near the Cape of Good Hope, is the type j but there are some European Mollusca, of small size, which are also referable to it.] The Thethys, Linn.,— Have along the back two rows of tufted. 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 Cuvier, Georges, baron, 1769-1832; McMurtrie, Henry, 1793-1865; Metcalf Collection (North Carolina State University). NCRS. London : Orr and Smith
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