Identifier: treatiseonzoolo09lank (find matches)
Title: A treatise on zoology
Year: 1900 (1900s)
Authors: Lankester, E. Ray (Edwin Ray), Sir, 1847-1929 Bather, Francis Arthur, 1863-1934 Goodrich, Edwin S. (Edwin Stephen), 1868-1946
Subjects: Zoology
Publisher: London : A. & C. Black
Contributing Library: Robarts - University of Toronto
Digitizing Sponsor: University of Toronto

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Text Appearing Before Image:
tyclwdus decurrens, Ag. ; Cretaceous, Sussex. (After A. S. Woodward,from Brit. Miis. Guide.) portions become separated off from the rest of the fin, so as to form aspecial anterior cephalic fin, median in the Myliobatinae (Fig. 129, B).In the Dicerobatinae this fin is developed as paired horn-like projections(Fig. 129, C). The head, with its large protruding eyes, projects dorsally above thelevel of the disk. The skeleton resembles that of the Trygonidae ; butthe ceratohyal is attached to the first branchial arch. The skin is smooth,excepting for a strong serrated spine which generally lies behind a singlesmall dorsal fin, near the base of the elongated whip-like tail (Fig. 129). Sub-Family 1. Myliobatinae. With a median cephalic fin,quite continuous with the pectorals in Promyliobatis. The teeth form aflat grinding pavement (Fig. 130), of which the central Iow becomes 166 SELACHII greatly enlarged and transversely elongated. They form a mosaic ofclosely fitting blocks of vasodentine.
Text Appearing After Image:
Dorsal view of, A, Saja clavata, L. ; B, Myliolxxtis aqiiiln, L. ; C, Cephaloptcra giov^nae, Lac.(After Da).) o.d, anterior dorsal fin ; a.pv, anterior lobe of pelvic fin ; ce, cephalic fin ; c.f,caudal fin ; d, clasper ; d, patch of large denticles ; j).d, posterior dorsal fin ; p.f, pectoral fin ;pr, pelvic liu ; s, spine ; up, spiracle.

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