430 BULLETIN 100, UNITED STATES NATIONAL MUSEUM. 



e 2 . Seven to ten weakly spinous carinae on scales of body; 

 scales of head with lower and more numerous carinae ; 

 5^ rows of scales between origin of second dorsal and 

 latex-al line, excluding lateral line series ; infraorbital ridge 

 scales in a double series only on preopercular region of 

 ridge ; area between ridge and orbit with scales of reduced 

 size ; orbit, 1.33 in postorbital length of head, equal to 

 least width of interorbital, which is contained 1.3 times in 

 postorbital ; preoral length of snout, 3.5 in head ; length 



of maxillary, 3.55 carinifer. 



c 2 . Snout with its tip more or less acuminate; sides of snout less 

 convex, sometimes nearly straight; the width between its 

 anterolateral angles less than 0.85 in length before that 

 point, usually much less; scales on ridges of head less 

 strengthened than in platorhynchus group ; flesh firmer 

 (japonicus group). 

 f^ Four or four and one-half rows of scales in a series from 

 origin of second dorsal to, but excluding, the lateral line 

 series. 

 g 1 . Underside of head completely scaled. 



h\ Three to seven strong spinous carinae on scales of body ; 

 orbit, 1.0 to 1.3 in postorbital length of head; pectorals 

 longer than postorbital portion of head ; pyloric caeca 



about 20 ; color of peritoneum blackish smithi. 



ti 1 . Eight or nine weak spinous carinae on scales; orbit, 

 1.8 in postorbital length (as measured on Alcock's 

 figure) ; pectorals shorter than postorbital portion of 

 head ; pyloric caeca about 40 ; color of peritoneum 



" silvery grey " flabellispinis. 



g'\ Underside of head scaleless. 



«\ Distance from center of anus to base of outer ventral ray 

 equal to, or less than, length of orbit ; a scaleless antero- 

 lateral groove on snout ; nasal fossa naked ; scales of 

 median rostral ridge with carinae radiating in all di- 

 rections from center of scale; median series of scales 

 between occipital and postorbital ridges little enlarged ; 

 orbit, 1.2 to 1.7 in snout, 1.05 to 1.25 in postorbital 

 length of head ; spinous carinae on scales of body weak, 



6 to 11 in number ! radcliffei. 



t 2 . Distance from anus to base of outer ventral ray decidedly 



longer than length of orbit; anterolateral region of 



snout and lower half of nasal fossa scaled; scales of 



median rostral ridge with carinae diverging outward 



and backward from front of scale; median series of 



scales between occipital and postorbital ridges much 



enlarged j 1 "spinous carinae on scales of body stronger, 



3 to 9 in number. 



j\ Orbit almost as long as postorbital length of head. 



fc*. Three to five spinous carinae on scales; snout longer, 



with outlines weakly convex ; orbit, 1.8 in snout ; 



barbel, 6 in orbit prod net us. 



1 These characters derived from the squamation of the head have not been verified in 

 C. anatirostri8, but probably will not be found different in that species. 



