860 CONTRIBUTIONS TO NORTH AMERICAN ICHTHYOLOGY IV. 
great inflatiou. Dorsal and anal fins rather long, falcate, of 12 to 15 
rays each; caudal Innate. A single nasal tube on each side with two 
openings near its tip. Jaws each with median suture. Lower side of 
tail with a fold, hare; 7.e<l'aXr^, head, from the incisor teeth). 
132§. I>. Iicvigaf IBS (Linn.) Gill. — Tambor ; Smooth Puffer. 
Olive green above, sides and below silvery white. Body elongate, 
the tail slender. Back and sides smooth ; belly ijrickly, the spinous 
region oblong, extending from the throat backwards nearly to the vent 
and on sides nearly as high as base of iiectoral fins; spines compara- 
tively large, three-rooted, well separated and with no smaller ones in- 
termixed. Eye large, silvery, 2 in snout, 1^ in the flat interorbital 
space. Gill-opening midway between snout and front of dorsal. Dor- 
sal and anal fins large aud falcate, the last rays rapidly shortened; 
height of dorsal If in head; caudal fin Innate, the longest ray in 
head; fold of skin on sides of tail very distinct, ridge-like. Head 3^. 
D. 14; depth 4^. A. 12. Tropical seas, north to Cape Cod. 
{Tetrodon Icevigatus L. Syst. Nat. i, 411: Tetrodon Icevigatus GUuther, viii, 274.) 
481.— TETKODOX* LinnjBus. 
{Tetrodon, Leisomus and Cirrhisomus Swainson: Cheilichthys Muller: Anchisomus Kaup.) 
{Tetraodon Linuseus, Syst. Nat. : type Tetraodon testudineus L.) 
Body oblong, usually little elongate; skin variously prickly or smooth, 
sometimes with cirri. A single nasal tube on each side, with two open- 
ings near its tip. Dorsal and anal fins short, little falcate, of 6 to 8 rays 
each; caudal truncate or rounded. Jaws each with median suture. 
Species numerous, in warm seas, {re-pa., four; Sdojv, tooth.) 
a. Tail without fold beloAV. 
b. Skiu almost smooth. 
1329. T. polatBBS Girard. 
Brown, with very numerous small, round, dark spots above; usually 
pale curved cross-bars present, in the form of conceutric rings, one on 
middle of back in front of dorsal, inclosing a dark area, another sur- 
rounding this, the remainder aitpeariug as bars, anteriorly running 
downward and backward, posteriorly downward and forward. Skin 
smooth; spines rudimentary or obsolete, on belly only, imbedded in 
*The eai'liest subdivision of the geuus Tetrodon seems to he that made by Swaiusou 
iu 1839. But one Liuuyeau species {testudineus') is retained in the geuus by Swaiusou. 
The section to which it belongs contains numerous species, and may well retain the 
original generic name. The value of the subdivisions is doubtful, but thfey may be 
retained for the present at least. 
