A treatise on zoology . Fir;. cornvhicu. Gni. (From Jordan and Evermann.) Teleostei, yet they are of quite different origin. The deep-sea genusMitsuhurina has a protractile mouth and spatulate snout. Sub-Family 1. Lamninae. Orthacodns, A. S. W. ; Jurassic, , A. S. W., Cretaceous, Europe and Asia, is perhaps thesame as the living Mitsukurma, Jordan, Japan. Odontaspis, Ag., Lamva,Cuv. (Fig. Ill), and Oxyrhina, Ag., in tropical and temperate seas,. Fig. (Alirpifs) vnlixs, Gm. (Aftii- Day, Fitihei of India.) extend down to Cretaceous ; Alopecia, M. an
A treatise on zoology . Fir;. cornvhicu. Gni. (From Jordan and Evermann.) Teleostei, yet they are of quite different origin. The deep-sea genusMitsuhurina has a protractile mouth and spatulate snout. Sub-Family 1. Lamninae. Orthacodns, A. S. W. ; Jurassic, , A. S. W., Cretaceous, Europe and Asia, is perhaps thesame as the living Mitsukurma, Jordan, Japan. Odontaspis, Ag., Lamva,Cuv. (Fig. Ill), and Oxyrhina, Ag., in tropical and temperate seas,. Fig. (Alirpifs) vnlixs, Gm. (Aftii- Day, Fitihei of India.) extend down to Cretaceous ; Alopecia, M. and H. (Fig. 112), andCarcharodon, M, and H., to Eocene. Cetorhinus, Blainv. {Selache, Cuv.)(Fig. 109) ; Atlantic, and Pliocene, Belgium. Sub-Family 2. Rhinodoxtinae. hhinodon, one of the largest sharks,reaching the length of some 70 feet, has gill-rakers like Cetorhinus. Thenostrils are near the margin of the mouth, which is almost minute conical teeth are very numerous. Rhinodon, Smith ; southern and tropical seas. Family Carchariidae. Usually pointed hollow teeth. No oro-nasal grooves. The spiracle may be absent {Carcharias, Sphyrninae). SQUALIFORMES 151 A third eyelid, or nictitating membrane, is present (Fig. 113); itappears to be a specialised anterior region of the lower lid. Sub-Family 1. Carcharinae. With an elongated rostrum. Mxidelushas acquired a blunt crushing dentition. Carcharias, Cnv., and Galeocerdo, M. and H., of world-wide distribution,exte
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