598 BULLKTIN OF THK t'NITED STATES FISH COMMISSION. 



bane iif thf fourtii anal ray liefore the last; vontrals reaching front nf anal; tlie peetorals are broken in 

 the type; in some of the cotypen they are intact and are coni]iarati\ely short, not reaching tlie njiddle 

 of the ventrals, and falling a little short of the anterior supra-anal. 



Scales thin, entire, caducous, those of the lateral line very little larger than the uthers. 



Arrangement of photojihores: As in M. ^wyw and .V. Iiiiiuholdli, the o supra-anals are so disposed 

 as to form an obtuse-angled triangle, the uppermost in contact with the lateral line vertically above 

 origin of anal tin, the second midway between the upper supra-anal and the last ventral ])hotophore, 

 the third anterior to the second and on a level with it, a little behind se<-ond ventral pair; supra- 

 ventral on a level with base of pectoral, a little higher tli:iu thinl supra-anal, s(]Miewhat nean'i- lateral 

 line than ventral base; pectorals fonuing the usual right-angled triangle, the Iowit vertically almve 

 the second thoracic ]iair, the upper somewhat nearer lateral line than pectoral base; ]iosterolaliral in 

 conta<'t with lateral line, slightly behind last antero-anal; two ojiercnlar spots, upjier the largest and 

 lower the smallest of all the photophores; mandibulars .3 as usual; no preocular photophore can lie 

 detected in these young sjiecimens. The first and second pairs of thoracics are more widely separated 

 than the other pairs, which are evenly spaced, tlie '2 lines diverging posteriorly. The 4 ventral pairs 

 are evenly spaced and form jiarallel lines. 



The anals vary from 12 to 14, the antero-anals from 7 to 'J, the jiostero-anals from 4 to (j. Tliey 

 are distrilnited as follows in the 70 cases (35 specimens): Antero-anals 7 in B cases, S in ."iS cases, it in 

 6 ca.ses; postero-anals 4 in (i cases, h in ."i7 cases, 6 in 7 cases; totals, IL' in li cases, b! in ■'i7 cases, 14 in 21 

 cases. Condiinations found bilaterally are 7 •- 5, 7 + 6, 8 -\- ,'i, il |- 4; S -|- r-, nci'urs on one or both sides 

 of 30 of the 35 specimens in the collection. As M. liunifjulilli has tyi>ically S 8 anals, and .V. ht/ojis 

 8 -J- 10, it would be entirely inadnn.ssible to identify M. irirmnnni with either of these species. In one 

 of the eotypes of il. ailifuniifiim' ICigenmann, I find the anals ti 11. The 2 caudal photo])hores in 

 M. crermaiuii are arranged a little obliciuely and are separated by an interspace a triHe wider than that 

 between the pairs of postero-anals. 



General color blackish, except cheeks, nostrils, and a part of the oj>ercli-s, which are whitish; base 

 of caudal lobes black. 



The species was taken at the following stations; Nos. 3S78, south of Lanai; :'.02ii, west of Oahu; 

 3927, west of Niihau; 3!)31, near Laysau Island; 3932, near Laysan Island; 3980, south of (lahn, and 

 4145, west of Niihau; all at the surface. 



Named for Dr. Barton Warren Everniann. 



Myctophum braueri, new species. Plate 70, Fig. 1." 



Type, 57 nun. long, from station 3980, south of Oahu, surface tow; type, N.i. 51527, I^. S. Nat. Mus. 



Closely related to M. niiiliiinllii Liitken, from the iNlediterranean, differing, in so far as apjjears 

 from I.iitken's figure and mtv liiief descrijition (Spolia Atlantica, 11, Scopelini, 1892, 257), in the 

 slightly lower position of the anterior suisra-anal ]iliotophore, the slightly higher insertion of the 

 supra-ventral, and the nmidi longer dorsal and anal (ins (with 11 and 1(> rays, respectively, in M. 

 rcinliiu-fllii). 



(.ireatest <lepth of Ijody 21 hundredths of total length without caudal; least depth of caudal 

 peduncle 7; length of head 28; diameter of orbit 13; fnjntal width over mid<lle of eye 8; length of 

 snout 5; length of maxillary 19; distance from front of snout to tip of dorsal 45; from front of dor.sal 

 to adipose dorsal 37; from front of adijiose dorsal to rudimentary caudal rays 18; from tip of snout to 

 ventrals 41; to origin of anal 58; base of anal 28; length of pectoral 30; of ventrals 12. D. 14; A. 22 (23 

 in other specimens) ; P. 14; V. 8; scales in lateral line 40 or 41, 9 in a cross-series, excluding median 

 rows along dorsal and ventral outlines. 



Body very slender, eye remarkably large, mouth obliijue, snout short but pointed, upper p'rofile 

 not abruptly decurved; orbital diameter little less than half length of head; interorbital width a little 

 less than three-sevenths; maxillary reaching the vertical from jiosterior border of eye, greatly widened 

 posteriorly and bearing a lengthwise ridge parallel witli its dorsal margin; a narrow strip of its ventral 

 portion protrudes below premaxillary near its tip; gape of mouth showing a double curve, convex 

 ui)ward in its posterior portion, concave upward anteriorly; mandible upturned toward symphysis, its 

 tip acute, ijrotruding a little beyond premaxillaries. 



"Miidophum lutkfui on plate, by error. 



