FISHES. MCCULLOCH. 183 



Nomenclature. Richardson used Lepidorhynchus 

 as an alternative generic name for denticulatus in case 

 that species proved to be distinct from Macrourus, and 

 it was duly recorded by Agassiz and Scudder. No generic 

 definition accompanied the name, but its association with 

 a genotype gives it priority over Optonurus which was 

 proposed for the same species later. Jordan (Gen. Fish, 

 iii, 1919, p. 398) attributes the name Lepidorhynchus 

 to Bleeker, 1879, and quotes L. villosus, a species of 

 Trachonurus, as the orthotype; but a reference to 

 Bleeker's paper leaves no doubt that he merely utilised 

 Richardson's name. 



LEPIDORHYXCHUS DENTICULATUS Richardson. 

 (Plate xlviii.) 



Macrourus vel Lepidorhynchus denticnlatus Richardson, 

 Ichth. Erebus and Terror pt. 4, 1846, p. 53, pi. 

 xxxii, figs. 1-3. 



Coryphcenoides denticulatus Giinther, Brit. Mus. Cat. 

 Fish, iv, 18'62, p. 396, and Challenger Rept., Zool., 

 i, 6, 1880, p. 26. Id. Macleay, Proc. Linn. Soc. N. S. 

 Wales, vi, 1881, p. 122. Id. Zietz, Trans. Roy. Soc. 

 S. Austr. xxxiii, 1909, p. 266. Id. Gilbert and Hubbs, 

 Proc. U.S. Nat. Mus. li, 1916, pp. 144, 147. 



Macrurus, Optonurus denticulatus Gtinther, Challenger 

 Rept., Zool. xxii, 1887, p. 147. 



Optonurus denticulatus McCulloch, Rec. Austr. Mus. vi, 

 5, 1907, p. 346, and Austr. Zool. ii, 2, 1921, p. 33, pi. 

 xi. Id. Waite, Rec. Cantb. Mus. i, 1, 1907, p. 17, 

 and Rec. S. Austr. Mus. ii, 1, 1921, p. 66. Id. Lord, 

 Proc. Roy. Soc. Tasm. 1922 (1923), p. 65. 



Br.6; D.xi/140; A.123; P.18; V.9; C.3. 



Head and trunk (116 mm.) 3-9 in the total length 

 (460) ; head (77) 5-9, and depth (64) 7-1 in the same. 

 Eye (26) almost 3 in the head; the length of the snout 

 is equal to the mterorbital width (17) and 1-5 in the 

 eye. Pectoral fin (62) 1-2 in the head. 



Snout and interorbital area covered with a delicate 

 membrane enclosing deep cavities between thin bony 

 crests; a median crest arises before the vertical of the 

 front margins of the eyes and slopes obliquely downward 

 and forward to form a small angle anteriorly; a second 

 crest is present on each side, curving over the nostrils 



