68 SALMONIDJE. 



inclies. 



Distance between root of pectoi-al and root of ventral 6^ 



Length of ventral fin S-^ 



Distance between root of ventral and origin of anal . . 4i 



Length of anal 2-^ 



Greatest depth of anal 3i 



Length of longest candal ray 3^ 



Length of middle caudal ray . . 2f 



The body of this specimen is short and extremely stout ; the head 

 and jaws strongly developed, but less so than in the specimen from 

 Shropshii'e. 



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

 fin, and is not quite one quarter of the total length (without caudal) ; 

 that of the head is three-tenths of the same. Snout much produced, 

 pointed, equal in length to four-fifths of the length of the postorbital 

 portion of the head, or five-sixths of the maxillaiy bone ; the lower 

 jaw has a terminal hook, much developed, and half an inch in height, 

 received into a deep depression in the extremity of the upper jaw : 

 the jaws do not meet laterally, and the external teeth of the upper 

 jaw are nowhere in contact with those of the mandible. The maxil- 

 lary bone is longer than the snout by half the diameter of the eye ; 

 it extends far beyond the vertical from the posterior margin of the 

 orbit, and its greatest width is two-thirds of the diameter of the eye. 



Dentition very perfect ; teeth strong ; those of the mandible and 

 intermaxillary being larger and stronger than those of the maxillary 

 and palatine bones ; the vomerine teeth do not reach far backwards 

 on the palate ; but those which remain are disposed in a double 

 series. The interorbital space is convex, being equal to two-thirds 

 of the length of the postorbital part of the head, or five-sevenths of 

 that of the maxillary bone : the eye is small, and placed slightly 

 below the iipper profile of the head. 



The praeoperculum has its posterior margin subvertical, somewhat 

 rounded, and the lower limb very indistinct ; the hinder margin of 

 the operculum is straight, and the angle which it forms with the 

 lower limb is an obtuse one. The suboperculum is broad, little 

 more than twice as long as broad. The distance between the upper 

 end of the gill-opening and the angle of the operculum is more than 

 that between the latter point and the lower anterior end of the 

 suboperculum. 



The distance of the origin of the dorsal fin from the occiput, if 

 measiux'd back from behind that fin, reaches two-thirds of the dis- 

 tance between the adipose and the root of the caudal. The dorsal 

 fin is higher than long, and consists of fourteen rays, of which the 

 anterior foui' are rudimentary and covered by the skin, the fifth 

 simple and nearly as long as the sixth, which is branched and the 

 longest of the fin : the terminal ray is cleft to its base. 



The anal fin is much higher than long ; it consists of eleven rays, 

 of which the first and second are rudimentary and covered by the 

 skin, the third simple and much shorter than the foiirth, which is 

 the first branched ray ; the last ray is cleft throughout. 



Pectoral rather longer than the postorbital part of the head, and 



