546 A COLLECTION OF FISHES FROM SUMATRA. 



211. Teuthis vermiculatus (Valenciennes). 



212. Teuthis virgatus (Valenciennes). 



213. Teuthis corallinus (Valenciennes). 



SIGANITES subgen. nov. 

 Type Chartodon canaliculatus Park. 



Cheek naked or only with a small area including a few scattered scales. 

 (From Siganus, an old name derived from the Arabic Sidjan or Sigtan.) 



214. Teuthis canaliculatus (Park). 



TRIACANTHIDiE. 



215'. Triacanthus brevirostris Schlegel. 



216. Triacanthus nieuhofii Bleeker. 



BALISTID^. 



217. Leiurus stellaris (Schneider). 



ZENODON Swainson. 

 Xenodon Ruppell, Neu. Wirbel. Faun. Abyss. Fisch., 1835, p. 52 [niger). 



Zenodon Ruppell, in Swainson, Lardner's Cabinet Cyclopsedia, Nat. Hist., II, 1839, pp. 194, 325 {niger). 

 Eiythrodon Ruppell, Verz. Mus. Senck. Nat. Ges., 1852, p. 34 {niger). 



I adopt the above name as it is a little different from Xenodon, a genus of 

 Ophidia, employed by Boie in 1827. 



218. Zenodon ceruleolorum sp. nov. Plate XVIII, upper figure. 



Head! 3 2V; depth 1^; D. Ill— ii, 32; A. ii, 27; P. i, 15; 35 series of 

 scales between gill-opening and base of caudal, and 3 more on latter ; about 24 

 scales in a transverse series between spinous dorsal and origin of anal ; snout 11 in 

 head, from its own tip ; eye Sf ; interorbital space 3 ; first dorsal spine 2 ; third 

 developed dorsal ray about l-i- ; first developed anal ray about If ; pectoral 21 ; 

 least depth of caudal peduncle Sf. , . 



Body deeply ovoid, well compressed, and greatest depth at pubic process. 

 Caudal peduncle rather thick, rounded, and its length a little more than its least 

 depth. 



Head large, greatly compressed, upper profile obliquely horizontal and straight, 

 and lower profile well convex. Snout long, and with a convex surface. Eye 

 small, high, close to and a little less than equal to space between snout's 

 upper margin. A deep groove extending obliquely down from front of eye. 

 Mouth small, superior, mandible convex in front and produced beyond jaws. Teeth 

 protruding, a single convex tooth on each side with a bevelled edge below. Mandi- 

 bular teeth incisor-like and with their two pointed edges adjoining. Lips rather 

 thin and tough. Nostrils minute, separated, and not far from front of eye over 

 orbital groove. Interorbital space convex. 



Gill-opening a little oblique. Filaments a little less than eye. About four 

 small rounded ossifications above base of pectoral and close behind gill-opening. 



Scales large, rather narrowly imbricated and more or less free on trunk, be- 

 coming smaller on anterior half of body and at bases of vertical fins, where they 



' Measured from tip of mandible. 



