1408 Catalogue of Malayan Fishes. [Dec. 



backwards, and is about £ of the length of the tail. Behind the two 

 spines the tail is naked and becomes very slender and tapering. Beneath 

 it appears a very indistinct trace of a skinny hem. Single small indivi- 

 duals occur at Pinang at all seasons. 



Breadth of the disk, m 5| inch . 



From the snout to the anus, 5f 



Length of the tail, 7f 



From the snout to the mouth, If 



„ to the eyes, If 



Breadth of the mouth, . Of 



Distance between the eyes, Of 



Length of the posterior spine, 2 



Trygon zugei, Burger. 



Trygon zugei, Miiller und Henle, 165. Taf. 



Trygon zugei, Richardson: Report, 1845, 197. 



(Young.) Above brownish yellow ; caudal membranes black ; beneath 

 reddish white. Iris golden ; pupil transversely oval. 



Habit : — Sea of Pinang. 



Indian Ocean, Sea of Japan, China. 



The snout is very prominent, acute. The anterior margins of the 

 disk are straight, the posterior convex. The external angle of the pec- 

 torals is equidistant from the apex of the snout and the anus. The 

 length of the disk slightly exceeds the breadth. The distance between the 

 nostrils and the apex of the snout is contained 3^ times in that between 

 the apex and the centre between the nostrils. The distance between the 

 eyes is ^ of their distance from the point of the snout. The teeth have 

 a transversal keel. The thin tapering tail is double the length of the 

 body. The spine is situated nearly at the anterior fourth of the tail. 

 Behind the spine appear a superior and inferior membrane. Both are 

 low, the inferior longer than the superior. The body is naked, but on 

 the dorsal column, between the occiput and the scapular region, appear 

 3 distant small thorns. Some distant, very minute thorns appear on the 

 sides of the tail behind the spine. The latter is about £ of the length 

 of the tail. 



From the apex of the snout to the mouth, If inch. 



„ mouth to the anus, 2f 



