1849.] Catalogue of Malayan Fishes. 1089 



the head is contained three times in the distance from the symphysis 

 of the lower jaw to the centre of a vertical line drawn between the 

 fifth dorsal and the anal spurious fins ; it is about 3f in the total length. 

 (In T. pelamys the head but slightly exceeds | of the latter.) The 

 height at occiput is § of the length of the head. 



The vertical diameter of the eye is £, the horizontal \ of the distance 

 from the point of the upper jaw to the gill-opening. (In pelamys the 

 diameter of the eye is 5^ in the distance given.) In the upper jaw 

 appear 23 distant, small, inwards arched teeth ; in the lower 30, the 

 posterior of which are a little stronger than the rest. The posterior 

 part of the external margin of the palatal bones carries a single series 

 of very minute teeth. The tongue is free, flattened, oval, and as well 

 as the whole cavity, of a pale blackish blue colour. The vertical 

 diameter in front of the pectoral fins is 4^ in the total length. The 

 anterior dorsal spine is placed opposite the second seventh of the pec- 

 toral fin. Its length is •£ of the head, taken from the symphysis of 

 the lower jaw. (In pelamys it is shorter.) The second spine is nearly 

 as long, but only half the breadth of the preceding ; the rest gradually 

 decrease in length to the sixth, which is about \ longer than the 

 seventh ; the succeeding decrease less perceptibly towards the fifteenth, 

 the length of which is about \ of the seventh. The distance between 

 the anterior and second dorsal fin equals the length of the seventh 

 spine. The anterior spine of the second dorsal fin is very short ; the 

 third scarcely exceeds \ of the first ray : all three spines are so com- 

 pletely hid by the integuments, as to be nearly imperceptible unless 

 the latter be removed, and such is also the case with the spines of the 

 anal fin. A vertical line drawn between the points of the caudal fin 

 is contained a little more than Z\ (in pelamys scarcely more than 3) 

 times in the total length. The length of the pectoral fin is 6£ in the 

 total length. The ventrals are f of the length of the pectorals, and 

 each is received into a furrow, externally bounded by a fold of the 

 corslet. Between the fins appears an elongated lamina, in length 

 equalling the fifth ray, the anterior half of which is connected by a 

 membrane to the abdomen. The corslet consists of three points : the 

 superior extends to and clasps the second dorsal fin. The series of 

 scales nearest the anterior dorsal fin, particularly those of the anterior 

 part, are very large, nearly rhombic ; the next three series are smaller, 



7 a 2 



