1903.] NATURAL SCIENCES OF PHILADELPHIA. 165 



the body is covered with rather large conspicuous spines, which are 

 very rough to the touch. Those on the upper surface are short and 

 sharp, and those on the belly elongate and somewhat clavate. 



Origin of the dorsal nearer the tip of the caudal than the posterior 

 margin of the eye, and the fourth ray the longest. Anal entirely 

 behind the dorsal, the fifth and sixth rays the longest, and, like the 

 other fins, rounded. Caudal elongate, deep, and the margin rounded. 

 Pectoral broad, the upper rays the longest, and situated directly 

 behind the gill-opening. 



Color in alcohol dark brown, especially on the back, the belly hardly 

 paler. The back, upper portion of the head, caudal peduncle, and cau- 

 dal fin, marked with numerous small round blackish spots. The dorsal, 

 anal and pectorals plain brown without markings. The flanks 

 are marked with about six oblique blackish bands, the first few broad- 

 est, and none of them extending on the middle of the belly. Vent 

 blackish. Bases of the pectoral and anal with several dark spots. 



Length 4^^ inches. 



One example. 

 4. Tetraodon immaculatus (Schneider). 



1801. [Tetrodon] Immaculatus Schneider, Syst. Ichth., p. 507. [After Lace- 



pede.] ' 

 1S66. Tetrodon immaculatus Gi'inther, Fishes of Zanzibar, p. 132; Aden; 



Zanzibar. 

 1870. [Tetrodon immaculatus] var. immacidata Giinther, Cat. Fish. Brit. 



Mus., VIII, pp. 291, 292; Port Natal (Coll. M. Ayres); Zanzibar (Coll. 



Lieut.-Col. Playfair); Mauritius (Coll. M. Cuming); Penang (Coll. Dr. 



Cantor); East-Indian archipelago; New Caledonia (Coll. M. Cuming); 



Australia. (Colls. M. Gould, Earl of Derby.) 



Head 2f ; depth (not inflated) about 2f ; D. 8; A. 9; P. 17; width of 

 head 1^ in its length; snout 2\ in the head; eye 6^; interorbital space 

 2; length of dorsal 2\; anal 2\] caudal l\; pectoral 2| ; least depth of 

 caudal peduncle 3. 



Body rather short, compressed, moderately broad, and the belly 

 capable of great inflation, the greatest width about the bases of the 

 pectorals. Caudal peduncle rather short, deep and compressed. 



Head moderately large, rather broad, rounded and little depressed 

 above. Side of the head not very convex. Snout long, blunt, and 

 with the upper profile straight. Eye small, a little nearer the gill- 

 opening than the tip of the snout. Mouth small, terminal, oblique , 

 with the mandible protruding, and its width about equal to one and 

 one-half eye-diameters. Lips broad, fleshy, and almost entirely cov- 



1 Based on " Le tetrodon sans-tache" Lac^pede, Hist. Nat. Poiss., I, 1798, pp. 

 475, 486, plate 24, fig. 1. [From Commerson; no locality.] 



