862 CONTEIBUTIOXS TO NOETH AMEEICAN ICHTHYOLOGY IV. 
rather small. Head depth 3. D. 7; A. 6; C. 7, slightly rouuded. 
L. 12 inches. Atlantic coast. Massachusetts to Texas ; very abundant. 
{Tetrodon turgidus Mitchill, Trans. Lit. & Phil. Soc. i, 473, 1815: Tetrodon turgidm 
Dfkay, New York Fauna, Fishes, 327: Tetrodon turgidus Gunther, viii, 285.) 
1333. T. triclioceplialiis Cojie. 
Ilrownish above, faintly vermicnlated with lighter; sides yellowish, 
becoming white below; tins uniform light yellow; a brown spot at base 
of pectoral. Profile suddenly descending from prefrontal region to pre- 
maxillary, arched from the former xioiut backward ; belly spinous to near 
vent; dorsal region from a little behind the uares to above the ends of 
the pectoral fins spinous ; spines on the head long, close-set, like seal 
bristles ; caudal fin truncate, with prominent points. Head in total 
length; eye 3 A in length of head. D. 8; A. 7. {Cope.) Newport, Ehode 
Island. 
(Tetraodon trichocephaJus Cope, Proc. Ac. Nat. Sci. Phila. 1870, 120.) 
4§2.— TRfCIE0I>I0I>0.\ Bleeker. 
Hairy Box-fishes. 
(Bleeker, Atl. Ich. Gyranodontes, 49: type Biodon pilosus Hitch.) 
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, {rpiyiov^ hair; d:ddcyy, Biodon.) 
1331. T. piiosiis (Mitch.) Bleeker. 
Brownish above, ashy below; spines of a metallic golden color; sides 
and back with a few oblong blackish-brown siiots. Body oblong, cuboid ; 
the skin entirely spinous, except a small space around the month and 
eyes and another on caudal peduncle. 1). 12; A. 11. {Behay.) North 
Atlantic; rare; said to reach a large size. . 
(Biodon jnl os us Mitch. Trans. Lit. & Phil. Soc. N. Y. i, 471, 1815: Biodon pilosus De- 
kay, New York Fauna, Fishes, 32G; Giiuther, viii, 316.) 
4183. — DIOIIOjV Linnseus. 
Borcupine-fishes. 
(Liuniens, Syst. Nat. 1758: type Biodon hystrix L.) 
Body robust, the belly moderately inflatable. Dermal spines strong, 
stiff, most of them two-rooted and erectile, a few three-rooted and there- 
fore immovable; both jaws entire; nasal tube simiile, with two lateral 
oitenings. Pectorals broad, their margin undulate, the ujiper lobe 
longest; vertical fins rouuded. Warm seas. ((5:?, two; tooth.) 
