. On the anatomy of vertebrates. Vertebrates; Anatomy, Comparative; 1866. 78 ANATOMY OF VERTEBEATES. 03 {Narcine), and at the same time with distinct pterygoid cartilages.' Four or five short cartilaginovis rays diverge from the posterior mamin of the tympanic pedicle, ib. c, and support a membrane answerincr to the opercular flap in Osseous fislies ; in their ultimate homology these rays are the skeleton of the diverging appendage or limb of the tympano-mandibular arch. The hyoid arch in Squatina, as in most other Plagiostomes, consists of two long and strong cerato-hyals, and a median flat-
. On the anatomy of vertebrates. Vertebrates; Anatomy, Comparative; 1866. 78 ANATOMY OF VERTEBEATES. 03 {Narcine), and at the same time with distinct pterygoid cartilages.' Four or five short cartilaginovis rays diverge from the posterior mamin of the tympanic pedicle, ib. c, and support a membrane answerincr to the opercular flap in Osseous fislies ; in their ultimate homology these rays are the skeleton of the diverging appendage or limb of the tympano-mandibular arch. The hyoid arch in Squatina, as in most other Plagiostomes, consists of two long and strong cerato-hyals, and a median flat- tened symmetrical piece, the basi-hyal. Six short cartilaginous rays extend outwards from the back part of the cornua, support- ing the outer membranous wall of the branchial sac: these answer to the bran- chiostegal raj's in osseous fishes, and support the di- verging appendage or limb of the hyoidean arch. But ^^Z'^'^^^Ibâr^-5^^5l?^^' ^^^'^ ^'^^^ '^^ integument in ^ â '^ ^ ' â'"""^â '^ which they project is not liberated, and is continuous with that supported by the opercular rays from the tympanic pedicle. Five branchial arches, fig. 30, I, 2, 3, 4, 5, succeed the hyoidean; but are sus- pended, as in the Lam- prey, I'rom the sides of the anterior vertebra3 of the trunk. In the Sea-hound [Sri/uniiis iicliia), fig. 63,the ceratobranchials, _/', f, and basiln-anchials, c, e, are shown, with the frame- work of the gills, 17, /. Be- hind these arches is the sca- ]iulo-coracoid arc, 52, united by cartilaginous confluence at the mid-line, not by ligament as hi the Sturgeon. ' xxi. I 8.')6, ])1. V. i\%%. 3 S: 4. It niay be questioned wliellief tlic ilctuclied pliite, e.'i]k'(l |i:iliitii}c l)y J)r Ileiile, be not rather tile Pliiil] Willi liraiicliial and scnpiilar arcliop. .9cf/»i. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these ill
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Keywords: ., bookauthorowenrichard18041892, bookcentury1800, bookdecade1860
