A COLLECTION OF FLSHES FROM SUMATRA. 547 



are all more or less inseparable. La space between month and gill-opening in ver- 

 tical series, and on lower surface of head and abdomen forming oblique series 

 parallel with lower profile line. Along bases of dorsal and anal elongate, narrow, 

 and forming series somewhat similar to layers of bricks. Small scales on bases of 

 caudal and pectoral. 



Spinous dorsal depressable in a groove, and inserted a little in front of pectoral. 

 First spine thick, finely roughened and more or less flattened in front, smooth and 

 flattened and somewhat compressed laterallj-, end rounded. Soft dorsal inserted a 

 little in front of anal, high in front where a pointed lobe is formed. Anaf similar 

 only lobe not pronounced. Pectoral small, broad, and rounded. Pubic process 

 free, movable, and followed by about twelve short spines. Caudal moderate, 

 median rays a little convex, and U2:)per and lower forming long slender points. 

 Anus surrounded by short spine-like processes, and placed just in front of anal fin. 



Color in arrack black, with a dull bluish-slat}- hue. Emargination of caudal 

 narrowly whitish with a submarginal narrow line of bluish. Margins of dorsal and 

 anal narrowly bluish. A broad black band from corner of mouth to lower edge of 

 gill-oj^ening, and bordered above and below broadly with bluish-gray. Margin of 

 pectoral black. Teeth bright scarlet. Iris pale gra3ish-blue. Peritoneum white. 



Length 15^ inches. 



Type No. 27,763, A. N. S. P. Padang. 



Three examples. This species is related to Zenodon niger (Riippell). Bleeker 

 gives a figure which he identifies with niger though it does not agree as Riip- 

 pell neither indicates the blue and black lines from the snout to the gill-opening 

 or mentions them in his description. My examples differ from Bleeker's in the 

 black band from the corner of the mouth being well bordered with bluish on each 

 side. 



{Ca^ruleus. blue ; /orum, bridle.) 



219. Pachynathus capistratum (Shaw). 



220. Balistapus undulatus (Park). 



TETRAODONTID^. 



221. Lagockphalus lunaris (Schneider). 



222. Lagocephalus albo-plumbeus (Richardson). 



223. Tetraodon palembangensis Bleeker. 



224. Tetraodon leiurus Bleeker. 



OONIDUS Rafinesque. 

 Oonidus Rafinesque, Analyse de la Nature, 1815, p. 90 {comviersofii). 



Postfrontals and prefrontals deflected to describe a segment of a circle. Dorsal 

 and anal small, each of about ten rays. 



Lacepede's account, also Dumeril's, are in the French vernacular. Ovum of 

 Schneider is preoccupied. 



225. Oonidus reticularis (Schneider). 



226. Oonidus immaculatus (Schneider). 



