. Discovery reports. Discovery (Ship); Scientific expeditions; Ocean; Antarctica; Falkland Islands. NOTOTHENIIFORMES 7 Examination of this fine series of specimens shows that M. microps is very closely related to M. tnormoratus, Giinther, from Kerguelen, and may even prove to be identical with that species. Comparison of examples of equal size, however, suggests that M. marmoratus has a smaller head, a slightly larger eye, and perhaps a shorter dorsal Fig. 2. Muraenolepis microps. x |. The only other species of Muraenolepis from the Antarctic Zone is M. microcephaliis, Norman, known
. Discovery reports. Discovery (Ship); Scientific expeditions; Ocean; Antarctica; Falkland Islands. NOTOTHENIIFORMES 7 Examination of this fine series of specimens shows that M. microps is very closely related to M. tnormoratus, Giinther, from Kerguelen, and may even prove to be identical with that species. Comparison of examples of equal size, however, suggests that M. marmoratus has a smaller head, a slightly larger eye, and perhaps a shorter dorsal Fig. 2. Muraenolepis microps. x |. The only other species of Muraenolepis from the Antarctic Zone is M. microcephaliis, Norman, known only from the unique holotype, 125 mm. in total length, from 63° 51' S., 54° 16' E (2000 metres of wire), collected by the Antarctic Research Ex- pedition. This form appears to be most nearly related to M. orangiensis, Vaillant, from the Patagonian region. I have given a key to the four known species of Muraenolepis elsewhere.^ REVISION OF THE ANTARCTIC NOTOTHENIIFORMES Regan's revision published in 1913,'^ together with his subsequent report on the rich material collected by the 'Terra Nova',^ has placed the taxonomy of this group of fishes on a sound basis. In more recent years, however, the Australasian Antarctic Expedition of 1911-1914, and the British, Australian, New Zealand Antarctic Research Expedition of 1929-1931, together with the important collections of the Discovery Committee, have brought to light a number of additional forms, and have added con- siderably to our knowledge of the fish fauna of the Antarctic Zone.* The problems raised by the study of this material have led me to undertake a new revision of these fishes, which, although it amplifies that of Regan, only modifies his conclusions in certain comparatively unimportant details. Division NOTOTHENIIFORMES Percoid fishes, normally without pungent fin-spines, with the spinous dorsal, when developed, shorter than the long soft dorsal and anal, the principal caudal rays reduced in number (usually 1
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