236 REVIEW OF TETRAODONTID^. 



3. Sphaeroides trichocephalus. 



Tetrodon trichoce])halns Cope, Proc. Ac. Nat. Sci. Phil.a., 1870,120 (Newport, 

 E. I.) ; Jordau «&- Gilbert, Synopsis Fish. N. A., 1883, 862 (copied) ; Jordan, 

 Cat. Fish. N. Am., 1885, 441 (name only). 



JSdbitat. — West Indian fauna; Gulf Stream. 



This species is kuown to us only from Cope's description of a small 

 specimen taken in the Gulf Stream off Newport. It is apparently very 

 close to 8. f'drtJd, and it is not unlikely that it will prove to be the 

 young 8. pachygaster; but as the latter species is kuown only from a 

 poor description of a single specimen, it is not possible to form any pos- 

 itive opinion. 



4. Sphaeroides fiirthi. 



Tetrodon fiirthi Steindacliner, Ichtbyol. Beitr. v. 22, 1874 (Panama); Jordau, 

 Proc. U. S. Nat. Mus., 188.^), 393 (Panama). 



Habitat. — Panama fauna. 



Specimens of this species, agreeing well with Dr. Steindachner's 

 description, were obtained by Professor Gilbert at Panama in 1883. 

 These specimens have been destroyed by fire, so that we are compelled 

 to fall back on Dr. Steindachner's description for comparison. The dif- 

 ferences between this species and 8. trichocephalus are not very evi- 

 dent from the comparison of the descriptions, but as the two belong to 

 different faunal regions it is probable that other differences would ap- 

 l^ear on comparison of specimens. 



5. Sphaeroides angusticeps. 



Tetrodon angusticeps Jenyus, Voyage of Beagle, Fishes, 154, 28, 1842 (Galapagos 

 Is.), Gunther, viii, 287, 1870 (copied); Jordan & Gilbert, Proc. U. S. Nat. 

 Mu8., 1882, 631 (Panama); Jordan, Proc. U. S. Nat. Mus., 1885, 393 (Panama). 



AneJiisomus angusticeps Richardson, Voyage of Herald, Fishes ; 1854, 159, (Gal- 

 apagos). 



Canthogaster lobatus Steindachuer, Ichthyol. Notizeu, x, 18, taf. 5, f. 3, 1870, 

 (Altata : from a shriveled specimen.) 



Habitat. — Panama fauna ; Altata to the Galapagos Islands. 



This strongly marked species was fii-st described from large speci- 

 mens in poor condition, with the spines obsolete, or lost. Next it was 

 redescribed by Dr. Steindachuer from a young example, shriveled iu 

 strong alcohol. Later two large examples (12 inches), one in the museum 

 of Yale College, the other now in the National Museum, were examined 

 by Professors Jordan and Gilbert. These authors observe: 



"These specimens agree perfectly with Dr. Steindachner's Altata 

 specimen (type of Canthogaster lobatus), but the nostrils are ibrmed iis 

 in typical species of Tetrodon {= Sphwroides), i. e., tubular with two lat- 

 eral openings near the summit. Jenyns' description of T. angusticeps 

 was evidently drawn from a specimen in poor condition. This would 

 account for the alleged absence of prickles on the skin. In all other 

 respects the description agrees with the specimens before us — the nar- 

 row, channel-like interorbital space, the minute, papilliform protuber- 



