NO. 2177. FOSSIL FISHES IN NATIONAL MUSEUM— EASTMAN. 



289 



Family GONORHYNCHIDAE. 



This family, represented in the Upper Cretaceous by CJiaritosomus, 

 and in the middle Eocene b}'- Notogoneus, is known to have but one 

 surviving species m the modern fauna. This is Oonorliynclius grcyi, a 

 speciahzed form which inhabits the seas off Japan, South Africa, 

 Austraha, and New Zealand. It has the head and body covered with 

 small ctenoid scales, and carries a ventral barbel on the prolonged 

 snout. The supraoccipital separates the parietals, the premaxilla 



Fig. 9.— Notogoneus osculus Cope. Green Rivee Eocene; Twin Creek, WTOJimG. Doesal (A) 



ANDLATEK.VL (B) ASPECTS OF CRANIUM, f. (AFTER L. HUSSAKOF). AlSfG, ANGULAR; AR, ARTICU- 

 LAR; D, dentakt; £, ethmoid; FR, front.vl; HM, HYOMANDiBxn.AR; lOP, interoperculum; 

 J/«P, metapterygoid; l/A", maxilla; OP, operculum; P^,pariet.\x; PPP, prefrontal; PMX, 

 premaxilla; POP, pkeoperculum; PSP, paraspuenoid; PTER, pterotic; Q, quadrate; SANG, 

 surangular; SO, supraoccipital; SOP, subopeeculum; SPH, sphenotic; SY, symplectic; VO, 

 vomer; X, cjeek-plate. 



articulates with the maxilla and excludes it from the margin of the 

 small mouth. According to Smith Woodward the members of this 

 family are related to the Scopehdac. 



Genus NOTOGONEUS Cope. 



Syn. Protocatostomus Whitfield. 



The type species of this genus is N. osculus Cope, from the Green 

 River Hmestone of Wyoming, m size attainmg a length of about 60 

 cm. The general structure of the head in this species is indicated in 

 the accompanying text-figure 9, taken from L. Hussakof , ^ who com- 

 bined in the diagram details shown by three specimens preserved in 

 the American Museum of Natural History. 



In plate 15, figure 2, is shown a young individual, which is the 

 smallest known belonging to this species. It adds nothing to our 



I Bull. Amer. Mus. Nat. Hist., vol. 25, 1908, p. 83. 

 65008°— Proc.N.M.vol.52— 17— — 19 



