n8 DISCOVERY REPORTS 



the National collection is quite inadequate for such a revision. Of the ten species of 

 Leirus recognized by Regan, three are not represented in the British Museum, and 

 five are represented only by two or three immature specimens. The form of the dorsal 

 fin would appear to provide a useful character for the definition of genera within the 

 family, but here the fragility of these fishes provides another difficulty in the way of 

 a satisfactory revision, as many of the specimens in museums have the spinous part 

 somewhat damaged, so that it is impossible to make out the exact form of the fin. Taking 

 the key to the genus Leirus which appears in Regan's paper, it seems that the first 

 division with the dorsal spines graduating to the higher soft rays forms a natural group — 

 Schedophilus. This has been further subdivided by many authors into three genera: 

 Schedophilus, Cocco (type S. medusophagus, Cocco); Leirus, Lowe (type L. bennettii, 

 Lowe, a synonym of Centrolophus ovalis, Cuvier and Valenciennes) j 1 and Hoplocorvphis, 

 Gill (type Schedophilus maculatus, Giinther). The second group, in which the dorsal 

 spines are short and do not graduate to the higher soft rays, would then stand as 

 Palinurichthys, Bleeker (type Coryphaena perciformis, Mitchill). This has been divided 

 into three genera : Ocycrius, Jordan and Hubbs (type Centrolophus japonicus, Doderlein) ; 

 Palinurichthys, Bleeker; and Hyperoglyphe , Giinther (type Diagramma porosa, Richard- 

 son). The differences between these, however, seem to be slight, and may only be of 

 specific importance. The genus Centrolophus, Lacepede, from which Ectenias, Jordan 

 and Thompson, is doubtfully distinct, is closely related to Leirus, but may be dis- 

 tinguished by the elongated body and the maxillary slipping under the praeorbital for 

 the entire length of its upper edge. The spines of the dorsal and anal fins are slender, 

 indistinct and graduating. The genera Nomeus, Cubiceps, Psenes, Seriolella, Psenopsis, 

 etc. have been well defined by Regan in the paper quoted above. 



STROMATEIDAE 



Stromateus maculatus, Cuvier and Valenciennes. " Pampanito " ; "Cagavino". 



1833, Hist. Nat. Poiss., ix, p. 399; Jenyns, 1842, Zool. 'Beagle', Fish., p. 74; Guichenot, 

 1848-9, in Gay, Hist. Chile, Zool. 11, p. 248, pi. iii, fig. 1; Giinther, i860, Cat. Fish., 11, 

 p. 398; Perugia, 1891, Ann. Mus. Civ. stor. nat. Genova (2) x [xxx], p. 615; Berg, 1895, 

 Anal. Mus. Nac. B. Aires, iv, p. 42; Steindachner, 1898, Zool. Jalirb., Suppl. iv, p. 299; 

 Delfin, 1901, Cat. Peces Chile, p. 57; Regan, 1902, Ann. Mag. Nat. Hist. (7) x, p. 204; 

 Steindachner, 1903, Zool. Jahrb., Suppl. vi, p. 206; Lonnberg, 1907, Hatnb. Magalh. 

 Sammelr., Fische, p. 8; Evermann and Radcliffe, 1917, Bull. U.S. Nat. Mus., xcv, p. 64; 

 Devincenzi, 1924, Anal. Mus. Montevideo (11) 1 (5), p. 219. 



St. WS 78. 13. iii. 27. 51 01' S, 68° 04' 30" W. Commercial otter trawl, 95-91 m. : 7 specimens, 

 290-375 mm. 



St. WS 90. 7. iv. 27. 13 miles N 83° E of Cape Virgins Light, Argentine Republic. Commercial 

 otter trawl, 82-81 m.: 4 specimens, 325-365 mm. 



St. WS 217. 1. vi. 28. 46 28' S, 60° 18' W. Commercial otter trawl, 146-146 m. : 1 specimen, 

 370 mm. 



1 Leirus, Lowe (1834) is preoccupied by Leirus, Megerle (1823), a genus of Coleoptera, and should 

 perhaps be replaced by Mupus, Cocco. 



