. Bulletin of the British Museum (Natural History) Zoology. 102 GORDON J. HOWES ans. DO-HCV Fig. 29 Macruronus magellanicus, relationship of cranium and anterior vertebral elements. A, lateral view; B, ventrolateral view in which 1st centrum and lower part of left side of neural spine have been removed (BMNH : 352-7, skeleton). having damaged fins. The type of L. pinnatus is in very poor condition, having damaged jaws (Fig. 33). Lyconus pinnatus differs from L. brachycolus in having long, slender gill-rakers along the outer side of the first gill-arch (4 on the epibranchial + 12 on th
. Bulletin of the British Museum (Natural History) Zoology. 102 GORDON J. HOWES ans. DO-HCV Fig. 29 Macruronus magellanicus, relationship of cranium and anterior vertebral elements. A, lateral view; B, ventrolateral view in which 1st centrum and lower part of left side of neural spine have been removed (BMNH : 352-7, skeleton). having damaged fins. The type of L. pinnatus is in very poor condition, having damaged jaws (Fig. 33). Lyconus pinnatus differs from L. brachycolus in having long, slender gill-rakers along the outer side of the first gill-arch (4 on the epibranchial + 12 on the ceratobranchial), whereas those in are short, flat and have spinous dorsomedial surfaces. In this respect, resembles Macruronus. According to Giinther's (1887) description, has a single canine- like tooth either side of the vomer (the teeth have now disappeared but their sockets remain visible); has five and Macruronus magellanicus 6 or 7, and 12 or more. The origin of the pelvic fins in both and Macruronus lie beneath that of the pectorals, whereas in (and Lyconodes) they are set forward. Radiographs of both Lyconus species indicate a similar cranial morphology to that of Macruronus. In the dorsal fin rays are broken off at their bases and externally it is impossible to distinguish two separate dorsal fins. The radio- graphs show, however, that there is a distinct gap between the 10th and 11th radial, which corresponds to the interdorsal space of Macruronus. For a radiograph does not reveal such a gap, indeed, the 9th and 10th dorsal radials are closer together than are the others, but Holt & Byrne (1906) noted an inflection of the dorsal fin outline at the 10th dorsal ray. Although Lyconus is said to have the gill membranes free from the isthmus, it appears that in there is such a connection judging from the remains of membrane attaching to
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