1386 Catalogue of Malayan Fishes. [Dfx. 



All were of the following dimensions : 

 Length of the head from the angle of the mouth, , . . 1|- inch. 



„ ,, lateral margin of the head, 1 



Distance between the eyes, 3f 



„ from the angle of the mouth to anus, 4f 



„ „ anus to anal fin, OJ 



Base of the anal, 0|f 



Height of do, Of 



Distance from anal to caudal fin, 0|J 



Length of caudal, 4 



Base of anterior dorsal, 1|. 



Height of do., 2 



Base of posterior dorsal, 0| 



Height of do., OJ 



Length of pectorals, If 



Breadth of do., T \ 



Distance between the nostrils, 2J- 



Distance between the angles of the mouth, Of 



The foetus or very young differs from the adult in its more arched 

 anterior margin of the head, and in the margin itself being more fes- 

 tooned. The length of the head is but little less than one-half of the 

 breadth. From the nostrils proceeds an almost imperceptible fissure, 

 and there is no notch in the anterior margin above them. The pos- 

 terior margin of the head joins the body at a nearly right angle. 

 (These are the distinguishing characters of tudes, Val.) The teeth 

 of the foetus are barely perceptible to the touch. The lateral pro- 

 cesses of the head are membranous ; but in each appear two narrow 

 cartilaginous tubes, one containing the optic, the other the olfactorian 

 nerve, 



Sphyrna blochii, (Valenciennes.) 



Bloch: 117. 



Zygaena blochii, Valenciennes ; Mem. du Mus, IX. PI. XI. Fig. 2. 



(Foetus.) 

 Zygaena blochii, Cuv. R. A. II. 393( 3 ). 

 Zygaena blochii, Bennet ; Life of Raffles, 694, 





