. Bulletin of the British Museum (Natural History) Zoology. B. Fig. 20 Pelvic bone in dorsal (left) and lateral (right) views of; A, Macruronus magellanicus (BMNH : 342-351) and B, Merluccius merluccius (: 44-49, alcian-alizarin stained preparations). Merluccius has two dorsal fins. First dorsal 8-13 rays, second dorsal with 34-45; middle rays of second fin shorter than others, giving fin a notched appearance. Anal fin has 35- 46 rays, also notched, anterior rays not produced. Dorsal and anal fins widely separated from caudal fin origin. Principal differences in the vertebral
. Bulletin of the British Museum (Natural History) Zoology. B. Fig. 20 Pelvic bone in dorsal (left) and lateral (right) views of; A, Macruronus magellanicus (BMNH : 342-351) and B, Merluccius merluccius (: 44-49, alcian-alizarin stained preparations). Merluccius has two dorsal fins. First dorsal 8-13 rays, second dorsal with 34-45; middle rays of second fin shorter than others, giving fin a notched appearance. Anal fin has 35- 46 rays, also notched, anterior rays not produced. Dorsal and anal fins widely separated from caudal fin origin. Principal differences in the vertebral column between Macruronus and Merluccius lie in the extreme development, in the latter, of the abdominal parapophyses which form a dorsal covering to the swimbladder, the lateral wall of which is firmly attached to the parapophyses. In Macruronus the swimbladder is a cigar-shaped structure with an anterior bifurcation, and lacking intimate attachment to the parapophyses (Fig. 21). In both genera the first radial of the first dorsal fin lies between 2nd and 3rd neural spines (Fig. 21). The neural spines and fin radials of Macruronus are thinner and larger than those of Merluccius and the dorsal laminae of the prezygapophyses taller. Although both genera have nearly equal numbers of abdominal vertebrae, Macruronus has more than twice as many caudal vertebrae, making a total. 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 Farn, Alexander E. London : Butterworths
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