3. TKTHOnON. 273 



between the end of the snout and the gill- opening. Interorhital 

 space very broad. Nostrils ? Tlio length of the head is rather less 

 than its distance from the dorsal, which is of moderate size, nine- 

 rayed (?). Caudal fin sliglitly emarginate. Brownish grey above, 

 with small scattered whitish spots in smnll number. 

 West Africa. 



a. StufiFed, 20 inches long. Gambia. Purchased of Mr. "WTiitely. 



The typical specimen of Bennett's T. guttifer appears to be lost ; 

 yet I do not hesitate to identify our specimen with Bennett's species, 

 as the diagnosis given by him agrees well enough with it. He did 

 not perceive the osseous scutes which in fresh specimens may be 

 liidden below the skin, or be entirely absent in j-ounger examples. 



II. No scKtes forming a carapace. 



1. Xasal organs very conspicuous. Back broad, not compressed. 



A. Nasal openings tivo on each side, opposite to each other, and situated in a 

 single more or less promineiit papilla. 



a. A inore (n- less distinct fold of the skin along the lower jyart of the tail : 

 ( 'a-;trophysus (^liill.). 



2. Tetrodon lagocephalus. 



Seba, iii. pi. 23. ii<x. 6 fyounn:). 



Tetrodou lagoooplialus, L. Ama'n. Acad. i. p. 310, tab. 13. fig. 4 (bad), 



and Si/sf.''Naf. i. p. 410 (not svnon.) ; Pmn. Brit. Zool. ed. 1812, 



iii. p. 174, pi. 23. 



liBvigatus, Pe^in. Brit. Zuol. iii. p. 132, pi. 20. 



stellatus, Donov. Brit. Fish. iii. pi. 66 ; Turton, Brit. Fann. 



p. IK); Flem. Brit. An. p. 174; Jenyns, Man. p. 489. 

 Lagocephalus pennantii, (Swains.) Bonap. Fann. Ital. 

 Tetrodon pennantii, Tarr. Brit. Fish. 2nd edit. ii. p. 457 : Conch, 



Fish. Brit. Isl. iv. p. 373, pi. 244. 



Body entirely naked above and on the sides ; abdomen covered 

 iinih fi.ved fonr-rooted spines of moderate size. The length of the 

 head less than its distance from the dorsal. Caudal fin emarginate. 

 Uniform greenish above, sides silvery, sometimes with rouiul blackish 

 spots ; abdomen white. Young with eight or nine cross bands on 

 the back, and generally with black spots on the belly. 



East- African coasts ; Irish and English coasts. 



n. Adult : stuffed. Algoa Bay. Presented by the Zoological Society. 

 b. Adidt (194 inches): stutied. South Africa. Presented bv Sir 



A. Smith, 

 r. Half-gTown : stufiTeil. ^lauritius. From the Collection of the 



Zoological Society. 

 </. Adult: stuftcd. Channouth, Dor.setshire. Presented by H. E»^ 



Norris, Esip /.-.c^^^f -.^V^/^V * > '-•f c'/ r/ '■\-^ S-jt^ 

 I . Adidt : skin. ' 



/'. Young: skin. 

 (J. Very young (2 inches). From the Haslar Collection. — Tliis cx- 



VOL. VIII. 1 



