104 PROCEEDINGS OF THE ACADEMY OF [Feb., 



and the dark interorbital space with four narrow connecting lines is 

 also very distinct. Three series of tubercles on the side of the caudal 

 peduncle blackish. Membrane of the spinous dorsal blackish, the other 

 fins plain pale brown. Very indistinct traces of the pale longitudinal 

 lines on the soft dorsal and anal are still evident. 



Length 2^^ inches. 



One example. 



TETRAODONTID^. 

 3. Tetraodon aerostaticus (Jenyns). 



1842. Tetrodon aerostaticus Jenyns, Zool. Voy. Beagle, Fish, pt. 4, p. 152. 



[Locality unknown.] 

 1866. Tetrodon lineatus Giinther, Fishes of Zanzibar, p. 131; Zanzibar. 



[Not of Linnseus.] 

 1870. Tetrodon stellatus Gunther, Cat. Fish. Brit. Mus., VIII, p. 294; Port 



Natal (Coll. M. Ayres) ; Zanzibar (Coll. Lieut.-Col. Playfair) ; Amboyna 



(Colls. M. Frank, Dr. Bleeker. Type of Tetrodon astrotaenia Bleeker) ; 



Japan; Feejee Islands. [Part, not var. n and /?.] 



Head 2^; depth (not inflated) about 2§; D. 10; A. 10; P. 19; width 

 of head greater than its length by nearly an eye-diameter; snout 2 in 

 the head; eye about 6; interorbital space If; length of dorsal 2^; 

 anal 2f; caudal 2; pectoral 3; width of base of pectoral about 3f ; 

 least depth of caudal peduncle 4. 



Body short, broad, and the belly capable of being greatly inflated, 

 the greatest width about the bases of the pectorals. Caudal peduncle 

 not very long, compressed. 



Head large, very broad, rounded or strongly conic above. Side 

 of the head more or less constricted, and the cheek not very convex. 

 Snout rather long, rather obtuse, and its upper profile a little concave. 

 Ej^e rather small, about two-fifths the length of the snout, high, and 

 about midway in the length of the head. Mouth rather small, broad, 

 its width nearly twice the eye-diameter. Lips broad, fleshy, covering 

 the greater portions of the teeth. Teeth large, very powerful, the 

 cutting edges concave and the suture without deep groove or ridges 

 on each side. Bifid tentacle conspicuous, about the last third of the 

 space between the upper lip and the front margin of the eye. Inter- 

 orbital space very broad, nearly flattened in front, and becoming 

 gradually slightly convex posteriorlv. The internasal space is about 

 one-half as wide as the interorbital. 



Gill-opening nearly as wide as the base of the pectoral, or about 

 equal to the internasal space. 



Peritoneum silvery. 



With the exception of the lips, leases of the fins, and caudal peduncle, 



