532 



DKKP-^EA FISHES OF THE ATLANTIC HASIN. 



II. 



THE INDIAN Sl'EC^IES OF CtELORHYNCHUS ANU MACKUKUh. 



]. Kky ti) TiiK Indian Species of the Suisgenus Cceloruynchus. 



1. Scales of the body witli not more than five spmy 

 ridges; sis rows of scales between the after 

 limit of the first dorsal fin and the lateral line; 



body with numerous cross-bands Hacrnrns 



{Calorlninvhiis) quadriciialatus. 



Scales of the body with usually eight spiuy ridges; 

 four rows of scales between tlie after limit of 

 the first ilorsal fin and the lateral line; color 



uniforui dark stone-gray Macrurus 



{Calorhjiiichus) JIubellisjrinia. 



Scales of the body with parallel spiny ridges, the spinature of the middle one of whi<h is by far the 

 strongest; pyloric c.^ca twelve in mimber 3- Macriirm {Calorhnnchiis) paralMus, Gtlir. 



Scales of the body with distinctly radiating spiny 

 ridges, all of which are uniform in size and spina- 

 ture ; pyloric cseca about forty in number. 



•J. Key 



niE Indian Species oe the SriiGENU.s Macrurus. 



Six branchiostegals 

 [seven to nine rays 

 in the ventral fin]. 



Second spine of the first 

 dorsal fin remarkal>ly 

 prolonged, more than 

 twice the length of the 

 head ; eight rays in the 

 ventral fin. 



No greatly prolonged 

 spine in the dorsal fin ; 

 seven to nine rays in 

 the ventral fiu. 



II. Seven branchioste- 

 gals [eight to twelve 

 rays in the ventral 

 tin]. 



i. Scales small, with five or sis well-spaced parallel 

 rows of spiuelets.jT/acrifrHs (Macrurus) lupholcs. 



ii. Scales largo, with about seventeen oblique 



crowded rows of spinelets Macnintx 



{Macrurus) macroJoph us. 



a. Seven rays in the ven- 



Scales with rows of 

 spinelets all of which 

 are of uniform small 

 size; greatest height ^ 

 of the body much 

 exceeding that of the 

 tail. 



Usually eight rays in the 

 ventral fin ; scales with 

 spinelets which may be 

 in rows or not, but are 

 never densely packed. 



tral lin; .snout blunt, 

 not longer than the 



eje Macrurus 



( Macrurus) Rexii'i. 

 b. Eight rays in the ven- 

 tral fin ; «nout sharp, 

 longer than the eye. 

 Macrmus (Macrurus) 

 JVood-Masoni. 

 Scales with rows of spinelets of which those in 

 the middle row are conspicuously larger than 

 the others; body not aliruptly delimited from 

 the tail; nine rays in the ventral Hn.. Macrurus 

 (Macrurus) Soski/uii. 

 Mouth very large; snout remarkably shallow; 

 barbel considerably longer than the eye ; spine- 

 lets of the scales without any arrangement ; a 

 p.atch of enlarged cycloid scales behind the first 

 dorsal fin ; cheeks, opercles, and belly burnished 



silver ; ventrals eight-rayed Macrurus 



(Macrurus) J'etersoni. 



Mouth very small ; snout deep; barbel not half 



as long as the eye; spinelets of the scales 



arranged in definite rows; opercles and belly 



black; ventrals eight-rayed Macrurus 



(Macrurus) Investigatoris. 



Ten rays in the ventral fin; scales with densely packed spinelets which show 



no arrangement in rows; suout quite peculiar in being vertically truncated 



with an abruptly prominent median tubercle, its length without the tubercle 



being not much'more than half that of the eye Macrurus 



(Macrurus) brerirostris. 

 ! a. Head large, its length 

 about one- fifth of the 

 total ; gill-openings 

 extremely wide, the 

 membranes being 

 united only quite in 

 front; ventrals 

 (eleven ox) twelve 



rayed Macrurus 



(Macrurus) polylejns. 

 Head singularly 

 small, its 1 e n g t h 

 about one-eighth the 

 total; gill-iipeuiugs 

 of the usual width, 

 the meuibraues being 

 broadly united ; ven- 

 trals with twelve 



rays Macrurus 



(Macrurus) pumiUceps. 

 ii Body of the Jisual tapering form; spinelets of the 

 scales in densely crowded rows, tdteen in num- 

 ber, besides short rows in between; ventrals 



(eleven or) twelve rayed Macrurus 



(Macrurus) scmiquincunoiatus. 



Usually twelve rays in 

 the ventral fiu ; scales 

 with rows of spinelets 

 which may be either 

 close-set or open. 



Tail lash-like and fili- 

 form : spinelets of the 

 scales in d e fi u i t e < ^^ 

 short rows, eight or 

 nine in number. 



