1 222 Catalogue of Malayan Fishes. [Nov. 



from the orbit radiate two upwards and two backwards ; in front of 

 the pectoral at the margin of the gill-opening an irregular, light blue 

 spot ; dorsal reddish orange ; rays, upper and basal margin light blue ; 

 caudal membrane yellowish brown, base, upper, lower and posterior 

 margin as well as the rays light blue ; anal reddish orange, base and 

 lower margin light blue ; spine and point of the ventrals light blue ; 

 anterior half of the membrane orange, posterior half white ; pectorals 

 yellowish white, second ray light blue. Iris narrow golden round the 

 pupil ; rest greenish olive. 



D 9/10, C 13f, A 3/9, V 1/5, P 15, Br. V. 



Habit. — Sea of Pinang. 

 Red Sea. 



Total length : lOf inch. 



The length of the head is 3f in the total. The horizontal diameter 

 of the orbit is 4| in the length of the head. The vertical diameter at 

 the occiput equals the length cf the head ; the greatest vertical diameter 

 of the body slightly exceeds the length of the head. The body is 

 covered by eight longitudinal series, each containing 23 scales. The 

 lateral line consists of backwards branching tubes. The line continues 

 on the third longitudinal series to the termination of the dorsal fin ; 

 a single tube then appears on the succeeding scale of the fourth series ; 

 the completing part of the line occupies the five posterior scales of the 

 fifth longitudinal series. This species greatly resembles Scarus harid, 

 Forskal, from which it differs in having the outline of the abdomen 

 much more convex than that of the back, and in having the angles of 

 the caudal much less elongated. The first of the undivided anal rays 

 is very short and so closely adhering to the second, that it easily may 

 escape observation. A single individual occurred at Pinang in May 

 1844. 



FAM. GLYPHIDODONTID.E. 



Gen. Tetradrachmum,* Cantor. 



(Equivalent to Dascyllus, Cuvier.) 



Shape oblong ; head obtuse ; teeth velvety, the external series 



* TerpdSpaxpoVf a coin, worth four drachms. Substituted for Dascyllus, 

 Cuvier, 1829, pre. occupied by Dascillus (scrib. Dascylus,) Latreille, 1796, (Co- 

 I copter a). 



