lOG 



Subgenus Cielorhynchus, Giintlier. 



Mouth comparatively small, entirely inferior, on tlie lower side of the head, 

 a longitudinal ridge dividing the infraorbital region into a vertical and a sub- 

 horizontal portion. Teeth in bands in both jaws . Scales imbricate, with strong 

 serrated keels ; no series of enlarged dorsal scales. Dorsal spine smooth. 



Key to the Indian species of the subgenus Ccslorhynchus. 



I. Scales of the body with subparallel spiny ridges: pyloric caeca 12 



ill number : seven braiichiostegals ... ... ... M. paraUelus. 



II. Scales of the body with radiating spiny ridges : pyloric cteca about 

 40 in number : six branchiostegals : — 



1. Body-scales with 5 spiny ridges : 6 to 6| series of scnles 



between the first dorsal fin and the lateral line ... M. quadricristatns. 



2. Body-scales with 8 or 9 spiny ridges : 4 to 5 series of scales 



between the first dorsal fin and the lateral line ... M. flahellispinis. 



82. ?Macrurii,s (Cmlorhynchiis) 2i(^'^(ilJelus, Giinther. 



Macrurus (Ccelorhynchjis) paralleliis, Giinther, Challenger Deep-Sea Tishes, p. 125, pi. XXIX. fig. A : Aleock, 

 Ann. Mag. Nat. Hist., (6) IV. 1889, p. 391, and Jonru. As. Soc, Bengal, Vol. LXIII. pt. 2, 1894, p. 126. 



B. 7. D. 10. A. 90. P. 16. V. 7. 



Scales with usually 5 spiny ridges which are nearly parallel to one another, 

 and of which the middle one is the strongest. 



Twelve pyloric caeca. 



Two young specimens in extremely bad preservation possess the above cha- 

 racters, and are therefore referred, though with hesitation, to M. parallelus Gthr. 

 Gulf of Manar, 597 fathoms. 

 Regd. Nos. 11760, 11761. 

 Distribution : New Zealand waters ; Japan ; Gulf of Manar. 



83. 3Iacriirtis (Cmlorhyiichtis) qua drier istatus, Aleock. 



Macrurus (^Ccelorht/nchus) quadricristatns, Aleock, Ann. Mag. Nat. Hist., August, 1891, p. 119 ; Joiirn. As. Snc. 

 Bengal, Vol. LXIII. pt. 2, 1894, p. 126: Ihustbations of the Zoology of thb Inves-tigator, Fishes, pl. III. 



FIG. 1. 



B. 6. D. 11. A. circ. 90. P. 16. V. 7. 



Head much exceeding the trunk in all three dimensions : tail low, compress- 

 ed, tapering. 



Length of the head nearly a third the total : greatest height of the body 

 barely equal to the length of the snout. 



Length of the snout nearly half that of the head, twice the major diameter 

 of the eye and twice the width of the interorbital space. 



