8G2 CONTRIBUTIONS TO NORTH AMERICAN ICHTHYOLOGY IV. 



rather small. Head 2; depth 3. D. 7; A. G; C. 7, slightly rounded. 

 L. 12 inches. Atlantic coast. Massachusetts to Texas ; very abundant. 



(Tetrotlni tnn/iilns Milchill, Trans. Lit. & Phil. Soc. i, 473, 1815: Teirodon turgidw 

 Dt-kay, \c\v York Fauna, Fishes, 327: Tetrodon turgidus Giinther, viii, 285.) 



1333. T. tricliocephalus Cope. 



Brownish above, faintly vermiculated with lighter ; sides yellowish, 

 In-coming white below; fins uniform light yellow; a brown spot at base 

 of pectoral. Profile suddenly descending from prefrontal region to pre- 

 maxillary, arched from the former point backward ; belly spinous to near 

 vent; dorsal region from a little behind the nares to above the ends of 

 the pectoral fins spinous; spines on the head long, close-set, like seal 

 bristles ; caudal tin truncate, with prominent points. Head 3 in total 

 length; eye 3 in length of head. D. 8; A. 7. (Cope.} Newport, Rhode 

 Island. 



(Tdruudon irichoceplialua Cope, Proc. Ac. Nat. Sci. Phila. 1870, 120.) 



482. TRICHODIODON Bleeker. 



Hairy Box-fislies. 



(Blecker, Atl. Ich. Gymnodontes, 49: type Diodon pilosus Mitch.) 



Body oblong, little depressed ; nasal tentacle present ; dermal ossifica- 

 tions very small, each with a pair of lateral roots, and each terminating 

 in a fine flexible, bristle-like spine, (-/"z^, hair; dtddwv, Dlodon.) 



1334. T. pilosus (Mitch.) Bleeker. 



Brownish above, ashy below; spines of a metallic golden color; sides 

 and back with a lew oblong blackish-brown spots. Body oblong, cuboid ; 

 the skin entirely spinous, except a small space* around the mouth and 

 c\es and another on caudal peduncle. D. 12; A. 1-4. (Dckay.) North 

 Atlantic: rare; said to reach a large size. 



(/Hottim J,U<>XIIH Mitch. Trims. Lit. A: Phil. Soc. N. Y. i, 471, 1815: Dio<l<>n jiilosits De- 

 kny, Nr\\ Vurk l'';mn:i, Fishes, :!-JC>; (iiintlit-r, viii, 31(>.) 



483. DIODON Linnseus. 



Porcupine-fishes. 



(Liiiiiifii-i. S\st. Nat. 1?.",-: type Hiudini Iti/xtrir L.) 



IJody robust, the bell\ moderately inllatable. Dermal sjiines strong, 

 still', most of them two rooted and erectile, a few three-rooted and there- 

 lore immovable: both jaws entire; nasal tube simple, with 1 \\ o lateral 

 openings. IVctnrals broad, their margin undulate, the upper lobe 

 longest; vert ical lins rounded. \Yarmseas. (o:?, two; oowv, tooth.) 



