A treatise on zoology . .There may be as many as twenty-nine vertebrae, and small plates arerarely found in the skin. Tctrodon, L.; tropical seas and African rivers; Eocene, , Bibr. ; Tropidichthys, Blkr. ; Xenopterus, Holl. ; Chonerhmus,Blkr.—tropical seas. Family DiODO>fTiDAE. The Porcupine Fish have beaks withoutsuture, the vertebrae reduced to twenty-two, and the skin armed withspines only. Diodon, L. (Figs. 454-5) ; tropical seas ; Eocene, Europe ; Miocene,Java, N. America. Dicotylichthys, Kaup ; Cliylomyderus, Blkr. (Fig. 453) ;Trichocyclus, Gthr.—tropical seas. 442 TE
A treatise on zoology . .There may be as many as twenty-nine vertebrae, and small plates arerarely found in the skin. Tctrodon, L.; tropical seas and African rivers; Eocene, , Bibr. ; Tropidichthys, Blkr. ; Xenopterus, Holl. ; Chonerhmus,Blkr.—tropical seas. Family DiODO>fTiDAE. The Porcupine Fish have beaks withoutsuture, the vertebrae reduced to twenty-two, and the skin armed withspines only. Diodon, L. (Figs. 454-5) ; tropical seas ; Eocene, Europe ; Miocene,Java, N. America. Dicotylichthys, Kaup ; Cliylomyderus, Blkr. (Fig. 453) ;Trichocyclus, Gthr.—tropical seas. 442 TELEOSTEI B. Family Molidae. The beaks have no median suture ; the body iscompressed and truncated behind, the vertebrae numbering seventeen, andtlie caudal being replaced by the dorsal and anal fins which join are no inflatable sacs, the skin is naked or with small spines. Theskeleton is very fibrous, and very imperfectly ossified. Orthagoriscn-% B. and S. (Mola, Cuv.) ; Eanzannia, Xardo— Fig. 46o. Skeleton of head and shoulder-girdle of Perea fluviatilis, L. (After Cuvier, from Claus andSedgwick.) Ac, postclavicles ; Als, alisphenoid ; ^n, angular; Ar, articular; , branchio-stegal rays ; CI, cleithruin ; Cor, coracoid ; D, dentaiy; Ekp, ectopterygoid ; Enj), endo-pterygoid; Ethi, mesethmoid ; Ethl, prefrontal; Fr, frontal; Frp, postfrontal; Hm, hyo-mandibular ; Hy, hyoid arch ; Jm, premaxilla ; JOp, interopercular ; Mty, metapterygoid ; Mx,maxilla; Ocx, epiotic; Op, opercular; Os, supraoccipital; Pal, palatine; Par, parietal; POp,preopercular ; i;, prootic ; Ps, parasphenoid ; ^*, quadrate ; .S, symjjlectic ; .SV, scapula; Sop,subopercular ; Sq, pterotic ; .Ssc, supraclavicle and post-teinpoial; Vo, vomer. Sub-Tribe C. The subocular shelf has been lost. Family Acropomatidae. Somewhat intermediate between theSerranidae and the Percidae. Acropoma, Schlg. ; Dinolestes ; Malacichthys, Dod. ; Pro2)oma, Gthr. ;?Synagrops, Gthr.—Pacific. Fami
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