532 



DKEP-SEA FISHES OF THE ATLANTIC BASIN. 



THE INDIAN SPECIES OF CCELORIIYNCIIUS AM) MACRURUS. 

 1. Kky to thu Indian Spkcibs ok thk Si'buknus Ciki.okhynchus. 



1. Scales of the body with not more than five spniy 

 ridges; six rows of scales between the after 

 limit of the first dorsal fin and tiie lateral line; 



body with numerous cross-bauds Alacrunia 



(Cwlorhjinchiis) qiuulricrisfatus. 



Scales of the body with usually eight spiny ridges ; 



four rows of scales betweeu the after limit of 



the first dorsal fin and the lateral line; color 



uniform dark stone-gray ilucrurnn 



{Ccttorhi/iichiiH) Jliibellisj)iniii. 

 Scales of the body with parallel spiny ridges, the spinature of the middle one of whiih is by far the 

 strongest; pyloric caca twelve iu number 3. Miwriirua {Cwlorhunchiis) parulleltts, Gthr. 



1. Scales of the body with distinctly radiating spiny 

 ridges, all of which are uuiforui iu size ami spina- 

 ture; pyloric cicca about forty in number. 



II. 



Key to the Indian Species of the Subgenus Macruuus. 



S i X branchiostegals 

 [seven to niue rays 

 in the ventral tin]. 



Second spine of the first 

 dorsal fin remarkably 

 prolonged, more than 

 twice the length of the 

 head ; eight rays in the 

 ventral tin. 



No greatly prolonged 

 spine in the dorsal tin ; 

 8c\eu to niue rays in 

 the ventral fiu. 



Scales small, with five or six well-spaced parallel 



rows of spiuelets.jl/acrMnis (MacruruK) lophotcs. 



. Scales large, with about seventeen obliijue 



crowded rows of spinelets Ilacriints 



(Maorurua) maciolo2>liiis. 



Scales with rows of 

 spinelets all of which 

 are of uniform small 

 size; greatest height 

 of the body much 

 exceeding that of the 

 tail. 



' 1. Usually eight rays in the 

 ventral fin; scales with 

 s])iuelets which may be 

 in rows or not, but are 

 never densely packed. 



11. Seven branchioste- 

 gals [eight to twelve 

 rays in the ventral 

 fin]. 



a. Seven rays in the ven- 

 tral fin; snout blunt, 

 not louger than the 

 eye Macninis 



{Macvurus) Hcxlii. 



b. Eight rays in the ven- 

 tral fin; snout sharp, 

 longer than the eye. 

 Macruius (Macrurua) 



Wood-Maaoni. 

 Scales with rows of spinelets of which those in 

 the middle row are conspicuously larger than 

 the others; body not al)ruptly delimited from 

 the tail; niue rays in the ventral ^n.-Macrunia 

 (Alacruriia) Hoskijiiii. 

 Mouth very large; snout remarkably shallow; 

 barbel considerably louger than the eye ; spine- 

 lets of the scales without any arrangement; a 

 patch of eularged cycloid scales behind the first 

 dorsal fin; cheeks, opercles, and belly burnished 



silver; ventrals eight-rayed Macrurua 



{Mavninis) I'etcisoni. 



Mouth very small ; snout deep; barliel not half 



as long as the eye; spinelets of the scales 



arranged iu definite rows; opercles and belly 



black ; ventrals eight-rayed Macrurua 



(Macrurua) Inreatigaforia. 



2. Ten rays in the ventral tin; scales with densely packed spinelets which show 



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



with an al)ruptly prominent median tubercle, its length without the tubercle 



being not much more than half that of the eye Macrurua 



(Macrurua) hreriroalria. 

 f a. Head large, its length 

 about one-fifth of the 

 total ; gill-openings 

 extremely wide, the 

 memlirau<>8 being 

 united only quite in 

 front; ventrals 

 (eleven or) twelve 



rayed Mncru rua 



( Macrurua) jioltfJcpia. 

 Head singularly 

 small, its length 

 about one-eighth the 

 total; gill-opeuiugs 

 of the usual width, 

 the memluauos being 

 broadly uuited; ven- 

 trals with twelve 



rays Macrurua 



(Macrurua) pumiliccpa. 

 Body of the usual tapering form ; spinelets of the 

 scales iu densely crowded rows, fifteen in num- 

 ber, besides short rows in between; ventrals 



(eleven or) twelve rayed Macrurua 



(Macrurua) eemi(iuhicuiwiutus. 



Usually twelve rays in 

 the ventral fin ; scales 

 with rows of spinelets 

 which may be either 

 close-set or open. 



Tail lash-like and fili- 

 form ; spinelets of the 

 scales iu de ti n i t e { 

 short rows, eight or 

 nine in number. 



