. The Annals and magazine of natural history; zoology, botany, and geology. Natural history; Zoology; Botany; Geology. Classification of the Order Salmopercce. 295 muciferous channels on the upper surface of the head are separated in the interorbital region by a median ridge or pair of ridges formed by the frontals and continued forward on the mesethmoid ; on the snout the muciferous channels lie in the large thin nasal bones, which are concave, with both outer and inner edges raised, the latter nearly or quite meeting above the ethmoidal ridge. The parietals are separated by the supraoccipita
. The Annals and magazine of natural history; zoology, botany, and geology. Natural history; Zoology; Botany; Geology. Classification of the Order Salmopercce. 295 muciferous channels on the upper surface of the head are separated in the interorbital region by a median ridge or pair of ridges formed by the frontals and continued forward on the mesethmoid ; on the snout the muciferous channels lie in the large thin nasal bones, which are concave, with both outer and inner edges raised, the latter nearly or quite meeting above the ethmoidal ridge. The parietals are separated by the supraoccipital; the otic bones are all well developed ; the exoccipital condyles are contiguous ; there is a thin-walled auditory bulla formed mainly by the basioccipital, exoccipital, and pro-otic ; there is no basisphenoid, and the pro-otics do not form a roof for the myodome ; the alisphenoids do not meet in the middle line, and there is no orbitosphenoid. The prse- orbital and suborbitals are ossified, without subocular shelf; there is no supraorbital; the opercular and hyopalatine bones are all present and normally developed; the palatine is attached to the head of the vomer and has a maxillary process; the prsemaxillaries have short pedicels which lie between the proximal ends of the maxillaries ; the latter are broadest distally and have no supramaxillaries ; the lower jaw is formed of dentary, articulare, and angulare. The lower pharyngeals are coalescent by their inner edges ; there are 3 sepaiate dentigerous upper pharyngeals on each side. Vertebral column.—There are 30 to 36 vertebree (13-17 + 17-19) ; the centra and arches are cc-ossified; most of the prsecaudals have rather strong transverse parapophyses ; the ribs are strong, mostly inserted on the parapophyses ; the epipleurals are A. B. Columbia trunsmontima.—A. Pelvic bones. B. Caudal fin skeleton. ep, epurals (epaxial basalia) ; hy, hypurals; c, last centrum ; it, urostyle. Skeleton of caudal Jin.—The caudal
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