Elements of the comparative anatomy Elements of the comparative anatomy of vertebrates elementsofcompar00wied Year: 1886 KO FIG. 49.—SKULL AND BRANCHIAL BASKET OF Pctromyzon planeri. Lb, labial cartilage : /.', cartilaginous ring-shaped support of the svctorial moutli : A, B, C, three other supporting plates of the suctorial mouth; ZB, lingual cartilage ; Na, external nostril; N, nasal sac ; Tr, trabeculaj ; PQ, palato- quadrate ; SS, fibrous cranial tube, which is cut through behind at MC (medul- lary i\inal) ; OB, auditory capsule ; Hy, hyoid : Ko, gill-openings ; t, posterior (pericardia!)
Elements of the comparative anatomy Elements of the comparative anatomy of vertebrates elementsofcompar00wied Year: 1886 KO FIG. 49.—SKULL AND BRANCHIAL BASKET OF Pctromyzon planeri. Lb, labial cartilage : /.', cartilaginous ring-shaped support of the svctorial moutli : A, B, C, three other supporting plates of the suctorial mouth; ZB, lingual cartilage ; Na, external nostril; N, nasal sac ; Tr, trabeculaj ; PQ, palato- quadrate ; SS, fibrous cranial tube, which is cut through behind at MC (medul- lary i\inal) ; OB, auditory capsule ; Hy, hyoid : Ko, gill-openings ; t, posterior (pericardia!) cartilage of the branchial basket; *,*, transverse bars of the branchial basket; C, notochord. capsule either immovably united with the vertebral column (Squalidse) or connected with it by articulations (Rays and Chimserae). MtZ FIG. 50.—SKULL OF HcptancJivs. Ji'S, vertebral column; GK, auditory capsule; PF, AF, postorbital and ant- orbital processes; Orb, orbit; R, rostrum; NK, nasal capsule; +, region of articulation of the palatoquadrate (PQ) with the skull; G, articulation of lower jaw : Mil, mandible ; Z, teeth. True bones are never developed, the cartilage being merely calcified; tin- |;»!|ii:i(lrate and the lower jaw arc nevertheless richly provided with teeth (Fig. 50, Z}.
Size: 1760px × 1136px
Photo credit: © Bookworm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: archive, book, drawing, historical, history, illustration, image, page, picture, print, reference, vintage
