140 ZOOLOGY OF THE VOYAGE OF THE BEAGLE. 



tain. It approaches, however, very closely the Passer lineis transversa notatus of 

 Sloane.* 



Plagusia ? 



Form. — Oval, but narrow, and much elongated for a Sole, the breadth in the middle being three 

 and a half times in the length. Eyes on the left side, very small, and closely ap- 

 proximating, equally in advance, or if any difference, the lower one a little first. Mouth 

 small, with velutine teeth on the supine side, but apparently none on the upper: snout a 

 little produced in a point beyond it. The dorsal and anal unite with the caudal, which ter- 

 minates in rather a fine point. No trace of any pectorals above or below. Scales strongly 

 ciliated, especially above, and both sides of the body rough. 



Length 7 inches. 

 Colour. — Not noticed. 



Habitat, San Bias, Coast of Patagonia. 



This species is very nearly allied to the Plagusia Braziliensis of Spix's work,t 

 but it appears to differ in having the eyes one over the other, or the lower one 

 perhaps a little in advance, instead of the upper one a little before the lower. 



Family.— CYCLOPTERID^. 



1. GOBIESOX MARMORATUS. Jen. 

 Plate XXVII. Fig. 1. 



G. dorso et lateribus pallide fuscis , nigro reticulatis et fasciatis : dentibus anterioribus 

 majoribus, in maxilla superiore subconicis, in inferiore incisivis : operculo postice 

 mucrone obtuso armato : membrand branchiali spina gracili, subduplici, (prater 

 radios solitos,) instructd, magna ex parte celatd, apice exserto : pinna dorsali 

 tredecim-radiatd . 



B. 6 ; D. 13 ; A. 11 ; C. 14 vel 15 ; P. 20 vel 21. 

 Long. unc. 2. lin. 7. 

 Form. — Head very large, broad and much depressed, with the snout rounded nearly in an exact 

 semicircle. Body compressed behind, and suddenly tapering behind the pectorals. The 

 length and breadth of the head are equal, each being one-third of the entire length, ex- 

 cluding caudal. Gape wide, reaching nearly to beneath the anterior angle of the eye. Teeth 

 strong, and somewhat crowded in front; in the upper jaw bluntly conical, or slightly 

 curved, but of irregular size, with minuter ones behind ; very small at the sides of the jaw, 

 and apparently here but in a single row : below, the six middle teeth are incisor-like, and 

 project forwards ; on each side of these are two or three similar to those in front above, then 

 follow some minuter ones at the sides. Eyes rather more than a diameter apart. Gill-open- 



* Nat. Hist, of Jamaica, PL 246, fig. 2. 

 t Pisces Brazil, p. 89, tab. L. 



