234 KXPEDITION OF THE " AL15ATR0SS,' 1899-1900. 



from pectoral ; middle pectoral photophore opposite the upper, not the 

 middle, pectoral rays, its distance from lower pectoral spot two-thirds its 

 distance from the upper; line joining middle and lower pectoral photo- 

 phores passing well in advance of the second thoracic pair. Fourth thoracic 

 greatly elevated, slightly below the middle pectoral (not above as in 

 L. timer opter us), over anterior part of interspace between third and fifth 

 pairs ; other thoracics nearly equidistant from the median line, the posterior 

 slightly diverging ; the interval between second and third pairs is tho 

 narrowest, that between third and fifth pairs one third the distance between 

 first and fifth, a little shorter than that between first .and second. Supra- 

 ventral vertically above ventral axil, its distance from lateral line two- 

 fifths its distance from base of ventrals. First ventrals closely approximated 

 at base of inner ventral rays ; second ventrals elevated, about on the 

 level of tho lower pectoral photophore and slightly anterior to the vertical 

 from the first ventrals (not well posterior to this vertical as in L. macro- 

 p/cnis); third ventrals slightly elevated, nearly equidistant between fir.>it 

 and fourth pairs; fourth pair closely approximated, at the sides of the 

 vent and a little anterior to it. Supra-an.als angulated, the upper in 

 contact with the lateral line, vertically above the first anal ray ; middle 

 supra-anal slightly anterior to tlie upper, in a verticjil which passes between 

 vent and first anal ray ; lower supra-anal nearly equidistant between 

 middle supra-anal and third ventral, the angle between the three nuich 

 less than in L. macropterus, a line joining the two lower supra-anals 

 traversing the base of the ventral fins. Antero-anals 6, the first and 

 fifth closely approximating anal base and equally distant from it, the first 

 above the fifth anal ray, the fifth above the twelfth ; second antero-anals 

 widely diverging; the third and fourth intermediate in position between 

 second and fifth pairs ; sixth pair (designated by Brauer as one of the 

 postero-laterals) abruptly elevated, nearer the fifth pair than the postero- 

 lateral, which is in contact with lateral line. Postero-anals 8 or 9, evenly 

 spaced, the second spot immediately above base of last anal ray, the series 

 continuous with the two lower precaudals, which are in no way distin- 

 guished from them. Precaudals 4, consisting of the two mentioned, a 

 fourth on the lateral line and a third below and in front of the fourth, 



