. The cyclopædia of anatomy and physiology. Anatomy; Physiology; Zoology. CEPHALOPODA. 525 Fig. Skeleton of t/te Cuttle-fish. nous prominence arising from the inner sur- face of the sides of the mantle. This pro- minence in the Sepia is of an oval shape ; but in the Tenthidte it forms a narrow, elongated, cartilaginous ridge, and is adapted to a cor- responding groove at the sides of the funnel. In the Calamary the ridge is of the same size with the groove ; but in the Onychoteuthis the ridge or antero-lateral cartilage commences at the anterior margin of the mantle, and extends downward
. The cyclopædia of anatomy and physiology. Anatomy; Physiology; Zoology. CEPHALOPODA. 525 Fig. Skeleton of t/te Cuttle-fish. nous prominence arising from the inner sur- face of the sides of the mantle. This pro- minence in the Sepia is of an oval shape ; but in the Tenthidte it forms a narrow, elongated, cartilaginous ridge, and is adapted to a cor- responding groove at the sides of the funnel. In the Calamary the ridge is of the same size with the groove ; but in the Onychoteuthis the ridge or antero-lateral cartilage commences at the anterior margin of the mantle, and extends downwards some way below the termination of the infundibular groove. Rathke* discovered in the corresponding part of the mantle of the * Memoires de 1'Acad. Imp. des Sciences Petersbourgh, torn. ii. pt. 1 et 2, p. 154. d« Loligopsis, viz. on either side and towards the ventral aspect, a thick, opaline, elongated cartilage, extending longitudinally for more than half the length of the mantle, and sup- porting a series of wart-like processes. These lateral tuberculated cartilages in Loligopsis we regard as corresponding to the lateral ridges in the Calamaries and Onychoteuthis above-men- tioned ; but in the Loligopsis they are not arti- culated with the sides of the funnel, which are otherwise attached to the mantle. In all the Decapods, however, this pair of cartilages on the ventro-lateral aspects of the mantle is more or less developed. In the Sepia a longitudinal cartilage is situated on the ventral aspect of the liver. The long lateral fins are, in the same genus, each supported by a narrow, flattened, elon- gated, cartilaginous plate (D, D, fg. 212 ) ; pointed at its anterior extremity, obliquely truncate behind; smooth and gently concave internally (g), but traversed by an irre- gular longitudinal ridge (h) on its external surface. These cartilages form the points of attachment to the powerful muscles of the lateral fins. From the dorsal ridge of each cartilage a number of close
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