1356 Catalogue of Malayan Fishes. [Dec. 



with the posterior margin rounded ; its length equals the head. The 

 pectorals are broad and rounded, ^ of the length of the head. The 

 lips, the throat, the space in front of the eyes, and that covered by the 

 pectorals, and the tail from midway behind the dorsal, obliquely down 

 a little in front of the anal, are all naked and smooth. The rest of the 

 body is covered with crowded fine hair-like spines. A solitary young indi- 

 vidual was observed at Pinang in September 1844. Russell observed 

 but the mutilated specimen, which he described and figured. 



B. With black spots. 



Tetrodon simulans, Cantor. 



Head above and back light yellowish or greenish olive, paler on 

 the upper half of the sides of head and body ; head, back and sides with 

 numerous rounded, irregular or confluent spots, blackish brown or olive 

 or black ; throat and abdomen white, sparingly dotted with brown ; 

 spines white, fins pale olive, transparent, minutely dotted with black ; 

 anterior half of caudal with three or four more or less distinct back- 

 wards arched blackish bands, posterior half blackish. Iris bright 

 yellow dotted with black. 



D 12 or 13, C 8f, A 10 or 11, P 19 or 21, Br. V. 



Hahit. — Sea and estuaries of Pinang, Malayan Peninsula, Singa- 

 pore. 



Total length : 1 foot. 



The length of the head is contained 3} times in the total. The 

 eye is situated in the middle of the head, bordering on the profile ; 

 the horizontal diameter is contained 5^ times in the length of the 

 head ; the distance between the anterior angles of the orbits is 2 

 diameters j between the posterior angles 2\ such. There are no 

 nostrils, but close in front of the anterior angle of the orbit appears 

 a flattened simple tentacle. The upper jaw slightly projects beyond 

 the lower ; the tongue resembles that of T. immaculatus. The 

 rounded dorsal fin occupies the commencement of the posterior fourth 

 of the back ; the three first rays are undivided ; the fifth and sixth 

 are the longest, £ of the head, and equal the extent of the base. 

 The anal is placed opposite the dorsal, which it resembles, but the 

 extent of the base is a little shorter, and but the two first rays are 

 divided. The caudal is broad, with the upper, lower and posterior 



