170 TELEOSTEI: PLECTOGNATHI. — XXII. 
which the stomach may be greatly inflated and the fish float belly 
upward out of reach of its pursuers. 
a. Back not carinated, skin without scutes; nostril on each side with two 
openings. 
b. D. and A. faleate, of 12 to 15 rays; C. lunate; vertebra 20; nostrils ses- 
sile; mucous tubes on head very conspicuous. LAGOCEPHALUS, 243. 
bb. D. and A. short, rounded, of 6 to 8 rays; C. rounded; vertebra 18; 
nostrils at tip of a hollow papilla; mucous tubes not conspicuous. 
Orsipus, 244. 
243 LAGOCEPHALUS Swainson. (Aayds, hare; xehahy, 
head.) 
481. L. levigatus (L.). Rassit Fiso. Smoota Purrer. 
Tambor. Olive green; silver-white below; belly with large 3-rooted 
spines; skin elsewhere smooth. Head 3}; depth 44. D.14. A.12 
L. 2 feet or more. Cape Cod to Brazil. (Lat., made smooth.) 
244, afinesque. (Lat., orbis, a sphere.) 
482.0. maculatus (Bloch & Schneider). Common PurFEr. 
SwELL-FisH. SWELL-TOAD. Sides of head and body always prickly, 
as is back from upper lip to D.; prickles all similar, small, close-set, 
8-rooted, never obsolete. Dark olive above, marbled and dotted 
with black ; black blotches on side forming short cross-bars; C. 
nearly plain. Head 22; depth 3. D.7. A.6. C.7. L.12. Cape 
Cod to §. C., very common. (Tetraodon turgidus Mitchill.) 
Famity XCII. DIODONITIDZA, (Tue PorcurPine-FIsHEs.) 
Fishes similar to the Tetraodontide, but having the teeth of each 
jaw grown into one; body with rooted spines; stomach less ex- 
tensively inflatable than in the Tetraodontide. Genera 3; species 
about 10, in warm seas. (dis, two; ddav, tooth.) 
u. Spines robust, all fixed, and 3-rooted (some of them rarely 4-rooted); nasal 
tube simple with two lateral openings. . . CHILOMYCTERUS, 245. 
245. CHILOMYCTERUS (Bibron) Kaup. (yeidos, lip; 
puxrnp, nostril.) 
483. C. scheepfi (Walbaum). Burr-risn. Sweit-Troap. A 
ridge above eye. Greenish, with series of parallel blackish stripes 
covering most of the body above; an ocellated black spot above P.; 
a larger one behind it; one at base of D.; a smaller one below it; 
fins unspotted. Head 23; depth 3. D.12. A.10. L.6. Cape 
Cod to Texas; very abundant S. (C. geometricus Bloch & Schnei- 
-der.) (Farther S. occurs Diodon hystrix L., larger, with longer 
spines, of which some are 2-rooted and movable.) (To Johann 
David Schopf, a Hessian surgeon in the Revolutionary War.) 
