1. TETRODON AEROSTATICUS. _Jen._

_T. capite, dorso, lateribus, et pinnâ caudali, nigro-maculatis;

ventre turgidissimo, fasciis obliquis nigris: corpore undique

muricato, caudâ solum exceptâ: capite brevi; fronte inter oculos

paululum depresso: maxillis æqualibus: lineâ laterali nullâ: pinnâ

dorsali omnino ante analem positâ: pinnâ caudali subrotundatâ._

D. 11; A. 10; C. 10; P. 11.

LONG. unc. 2. lin. 6.

FORM.—Head short. Body approaching to globular, with the skin of the

belly extremely loose and capable of great inflation; every where

beset with minute prickly asperities, the extreme end of the tail

alone excepted. Crown nearly flat, very slightly depressed between

the eyes. Jaws equally advanced. Nostrils tubular. No appearance of

any lateral line. Dorsal entirely in advance of the anal: both these

fins small. Caudal slightly rounded.

COLOUR.—(_In spirits._) Head, back, and sides to the depth of the

pectorals, greyish brown, spotted with black; the spots very small

and crowded on the back, but becoming larger on the flanks and tail.

Belly white, with deep black oblique broad bands, inosculating in

some places, so as to form large meshes. Dorsal, anal, and

pectorals, plain; but the caudal very elegantly and distinctly

spotted.

The ticket attached to this specimen has been lost, and its locality is

in consequence unknown. In general appearance, it very much resembles

the _T. lineatus_ of Bloch, of which it may possibly be a variety; but

it would seem to differ from that species, in having the forehead less

elevated; in wanting the lateral line altogether, of which I can

discover no trace; and in having the whole back and upper part of the

sides spotted, and not merely the tail and its fin, as is represented in

the _T. lineatus_.

The zoology of the voyage of H.M.S. Beagle, [vol. 4 of 5] · 第 197 / 282 题