. Elementary text-book of zoology. Zoology. 13 i PISCES. and Salmon). The remains of cartilage are retained longest in the ethmoid region (tiilurus, Cyprinus), while on the roof and base of the skull all remains of cartilage are replaced, partly by membrane bones and partly by the primarily ossifying oecipitals (basi- and exoccipital) and petrosals (periotic) as well as by the alisphenoids. The posterior part of the skull is connected with the vertebral column without any special articulation (except in the Rays and Os Par Ethl Ssc. SOp Cl FIG. 586.—Cephalic skeleton of Perca fluvuMUs (regne a
. Elementary text-book of zoology. Zoology. 13 i PISCES. and Salmon). The remains of cartilage are retained longest in the ethmoid region (tiilurus, Cyprinus), while on the roof and base of the skull all remains of cartilage are replaced, partly by membrane bones and partly by the primarily ossifying oecipitals (basi- and exoccipital) and petrosals (periotic) as well as by the alisphenoids. The posterior part of the skull is connected with the vertebral column without any special articulation (except in the Rays and Os Par Ethl Ssc. SOp Cl FIG. 586.—Cephalic skeleton of Perca fluvuMUs (regne animal). Os, supraoccipital; Oeo-, epiotic; Par, parietal; Sij, squamosal (pterotic); Fr, frontal; Frp, poslfrental (sphenotic) ; PrO,prootic; Ah, alisphenoid ; Ps, parasphenoid ; Sthi, median ethmoid; Ethl, lateral ethmoid (prse-frontal); Hm, hyorcandibular; S, symplectic; Q, quadrate; Mtp, metapterygoid; Enp, endopterygoid ; Ekp, ectopterygoid; Pal, palatine; Vo, vomer; Jm, intermaxillary (premaxillary); MX, maxillary; D, dentary ; Ar, articulare ; An, angulare ; O^,.operculum ; POp, prse-operculum ; SOp, sub-opercuhim ; JOp, inter- op^rculum; Hi/, hyoid arch ; Brs, branchiostegal rays ; Cl, clavicle; Sc, scapula Cor, coracoid ; Ssc, supraclavicle ; Ac, accessory bone. Chirntera), the os basilare having the conical depression and form of a vertebral body. Between the exoccipitals (which contain the fora- mina for the exit of the vagus and glosso-pharyngeal nerves) and the supra-occipital, which is distinguished by a strong ridge, an epiotic bone (occipitale externum) is inserted on either side (fig. 586, Oex). Close to the epiotic bone is the opisthotic (Huxley), which varies greatly in size and form (being very large in Gadus and small in. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Claus, Carl, 1835
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectzoology, bookyear1884
