. Fig. 29. Cottoperca gobio. x \. either a Cottoperca or Notothenia. Since the dorsal rays are given as VII, 22, and the anal rays 21, it would appear to belong to this genus. Cottoperca gobio exhibits considerable variation in the size of the eye, height of the fins, and in other features, but after carefully examining and tabulating about 70 specimens I am unable to recognize more than one Judging from published descriptions and notes, the colour in life is also subject to considerable variation. Bovichtus argentinus, MacDonagh. Bovichthys diacanthus (non Carmichael), Berg, 1895, A
. Fig. 29. Cottoperca gobio. x \. either a Cottoperca or Notothenia. Since the dorsal rays are given as VII, 22, and the anal rays 21, it would appear to belong to this genus. Cottoperca gobio exhibits considerable variation in the size of the eye, height of the fins, and in other features, but after carefully examining and tabulating about 70 specimens I am unable to recognize more than one Judging from published descriptions and notes, the colour in life is also subject to considerable variation. Bovichtus argentinus, MacDonagh. Bovichthys diacanthus (non Carmichael), Berg, 1895, Anal. Mus. Nac. B. Aires, iv, p. 65; Berg, 1897, Anal. Mus. Nac. B. Aires, v, p. 298. "Bovichthys patagonicus"', (Berg) Regan, 1914, Brit. Antarct. ('Terra Nova') Exped. 1910, Zool. 1 (1), p. 26. Bovichthys argentinus, MacDonagh, 1931, Not. Prelim. Mus. La Plata, I, p. 99; MacDonagh, 1934, Rev. Mus. La Plata, xxxiv, p. 77, pi. viii, fig. 2, pi. ix, pi. x, fig. 1, text-figs. Hab. Coast of Argentina and northern Patagonia. No specimens of this species were obtained by the expedition, but I am indebted to Mr MacDonagh for a young example (54 mm. in total length) from Puerto Madryn. The holotype (285 mm.) was taken in the Bahia del Fondo, Golfo San Jorge, and others have been recorded from La Plata. This species appears to be very close to B. chilensis, Regan, but seems to have a somewhat wider and more concave interorbital region. It is possible that comparison of specimens of similar size would show the two species to be identical. 1 The types are two skins, 400 and 420 mm. long, from Port Famine. 2 Mr E. R. Gunther informs me that he studied a fairly large series of examples in a fresh condition, but was also unable to separate them into more than one species. D XVI 9
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