1. SALMO. 73 



inches. 



Distance between end of snout and eye 1 



Diameter of the eye i 



Length of the maxillary bone 1a 



Distance between eye and angle of praeoperculum . . li 



Greatest width of operculum 1 



Greatest depth of operculum li 



Distance betw een occiput and origin of dorsal fin . . 4 



Distance between end of dorsal and root of caudal . . 4^ 



Length of base of dorsal 1 1 



Greatest height of dorsal 1a 



Length of pectoral li 



Distance between root of pectoral and root of ventral 3f 



Length of ventral fin li 



Distance between root of ventral and origin of anal . . 2f 



Length of anal fin i 



Greatest depth of anal li. 



Length of longest caudal ray 1|- 



Length of middle caudal ray li 



The greatest depth of the body is below the origin of the dorsal 

 fin, and is contained four times and a half in the total length (with- 

 out caudal) ; the length of the head is contained three times and a 

 half in the same. The snout is considerably produced, obtusely 

 conical at the extremity, and more than half as long as the postor- 

 bita] portion of the head ; the length of the maxillary bone is equal 

 to that of the snout together -with, the entire diameter of the eye, its 

 greatest width being rather more than half that diameter. The 

 lower jaw is veiy slightly bent upwards, having a very faint trace 

 of a hook ; when the mouth is closed the maxillary does not come into 

 perfect contact with the mandible. 



The teeth are strong and conical, those of the mandible, inter- 

 maxillary, and palatine bones being stronger and larger than those 

 of the maxillary. The head of the vomer is triangular, much 

 broader than long, and bears four teeth on the ridge of its hinder 

 margin ; the remainder of the teeth are arranged along the median 

 longitudinal ridge in a double, or rather zigzag, series, one of each 

 pair being in advance of the other. 



The interorbital space is but slightly convex, the eye being situ- 

 ated not far beneath the upper profile of the head ; the width of this 

 space is equal to the length of the snout, or two-thirds of that of the 

 maxiUary bone. The maxillary reaches beyond the vertical from the 

 hinder margin of the orbit. 



The hinder margin of the praeoperculum is slightly convex, in- 

 clining backwards, with the angle and lower limb rounded, the latter 

 not very distinct. The posterior margin of the operculum is almost 

 straight, rounded off towards the angle, which is an obtuse one. 

 The distance from the upper end of the gill-opening to the angle of 

 the operculum is equal to that from the latter point to the lower 

 anterior end of the suboperculum. Suboperculum more than twice 

 as long as high. 



