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. falcate, 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; vertebre 18; 
nostrils at tip of a hollow papilla; mucous tubes not conspicuous. 
OrpIDUus, 244. 
243 LAGOCEPHALUS Swainson. (Aayas, hare; xepadn, 
head.) 
481. L. levigatus (L.). Rassit Fisn. SmootnH PUuFFER. 
Tambor. Olive green; silver-white below; belly with large 3-rooted 
spines; skin elsewhere smooth. Head 31; = depeh 44, D.14. A.12 
L. 2 feet or more. Cape Cod to Beil | (Lat., med smooth.) 
244. ORBIDUS Rafinesque. (Lat., orbis, a sphere.) 
482. O. maculatus (Bloch & Schneider). Common PUFFER. 
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, 
3-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 S$. C., very common. (Tetraodon turgidus Mitchill.) 
Famity XCII. DIODONITID A, (Tue Porcurine-FIsHEs.) 
Fishes similar to the T'etraodontide, 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. (8is, two; ddeav, tooth.) 
a. Spines robust, all fixed, and 3-rooted (some of them rarely 4-rooted); nasal 
tube simple with two lateral openings. . . CHILOMYCTEKUS, 245. 
245. CHILOMYCTERUS (Bibron) Kaup. (yetdos, lip; 
peuxtnp, nostril.) 
483. C. schoepfi (Walbaum). Burr-risnH. SweLi-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 8. occurs Diodon hystrix L., larger, with longer 
spines, of which some are 2-rooted and movable.) (To Johann 
David Schoépf, a Hessian surgeon in the Revolutionary War.) 
