134 THE VOYAGE OF H.M.S. CHALLENGER. 



space flat, its width being equal to the vertical diameter of the eye. The horizontal 

 diameter of the eye equals the length of the snout, and is two-sevenths of that of 

 the head. 



The scales are covered with very small spinelets, which are arranged in about nine 

 series, the middle series being sometimes more prominent than the others ; only the 

 terminal spinelet of the central series projects sometimes beyond the margin of the scale. 

 There are six scales in a transverse series between the first dorsal spine and the lateral 

 line. Second dorsal spine somewhat produced, armed in front with rather closely set 

 barbs. The distance between the two dorsal fins equals the length of the head, the snout 

 not included. The outer ventral ray produced into a filament. Brown. 



Habitat. — Atlantic, between the Canary Islands and south of Portugal ; Mediter- 

 ranean. 



Ninety miles south-east of Cape St. Vincent, Station V.; depth, 1090 fathoms. 

 One specimen, 11 inches long. 



The determination of this specimen is subject to some doubt ; it does not show so 

 strong a central keel on any of the scales as is represented by Valenciennes, though some 

 scales have the central series of spinelets decidedly enlarged. This specimen is also 

 closely allied to those which I have separated under the name of Macrurus sequalis. 

 But the interorbital space is wider, and the spinelets of the scales are much more 

 numerous than in the latter species* 



Macrurus sequalis (PL XXXII. fig. C). 



? Macrounis serratus, Lowe, Proc. Zool. Soc. Lond., 1843, p. 91. 

 Coryphsenoides xqualis, Gunth., Ann. and Mag. Nat. Hist., 1878, vol. ii. p. 25. 



AUied to Macrw^s rudis. 



1 D. 12. A. 90-118. P. 17. V. 9. 



Snout conically projecting beyond the mouth, with rather obtuse and rough upper 

 edge ; the cleft of the mouth extends nearly to below the centre of the eye. The teeth 

 of the outer series are visibly stronger than the remainder. Barbel slender, but not so 

 long as the eye. The upper profile rises rather suddenly towards the anterior dorsal 

 spine. The interorbital space is flat, its width being considerably less than the diameter 

 of the eye, which conspicuously exceeds the length of the snout, and is one-third or 

 rather more than one-third of the length of the head. The scales are equally rough 

 over the whole of their surface, the spinelets being subequal in size, densely packed, but 

 arranged in from eight to twelve series, the middle series not being more prominent 

 than the others (as is the case in Macrurus sclera rhynchus). The entii-e margin of the 



