478 DE. GUNTHER ON THE FISHES OF CENTRAL AMERICA. 



with from four to seven short setiform spines. Posthumoral ridge rather distinct. Each 

 scute is variegated with dirty yellow and dark brown. 



I have received of this species only a single skinned example, 12^ inches long; it is 

 from Veragua. 



22G. Ch^tostomus cirrhosus (Val.). 



Messrs. Kner & Steindachner (/. c. p. 61) mention this species from the Rio Chagres ; 

 but their species is probably distinct from it. 



227. LORICARIA URACANTHA. 

 Kucr & Steindaclmerj Abhandl. baycr. Akad. x. p. 56, Taf. 6. fig. 3. 



Snout broad, of moderate length ; eye of moderate size, with a notch in its posterior 

 margin, its horizontal diameter is one-half of the width of the interorbital space, which 

 is slightly concave, owing to the raised supraorbitals. Eight or ten rather large bifid 

 teeth in eacli jaw. Labial folds broad, with numerous papilla-, and a small lateral 

 barbel. The lower side of the head naked ; scutes of the neck but very indistinctly 

 bicarinate. L. lat. 27. There are seven lateral scutes between the pectoral and ventral 

 fins. Thorax and belly with numerous small irregular scutes. The origin of the dorsal 

 is opposite to that of the ventrals. The length of the outer pectoral ray is contained 

 six times and a half in the total (without caudal). The itpper caudal ray very thick and 

 strong. Rays of all the fins spotted. 



Pacific and Atlantic rivers of Panama. 



229. Macrodon microlepis (Gthr.). 

 The fish described by Messrs. Kner and Steindachner (l c. p. 28) under the name of 

 M. tareira belongs to this species. 



2o6. Tetragoxopterus ^neus (Gthr.). 

 This species has been recognized in a collection from Panama by Messrs. Kner and 

 Steindachner {J. c. p. 46). 



237. Chalcinopsis dextex. (Plate LXXXII. fig. 1, f nat. size.) 



Bnjcon dentex, Giinth. Proc. Zool. Soc. 1860, p. 240. 

 Chalcinopsis dentex, Giinth. Fish. v. p. 337. 



D. 11. A. 35-36. L. lat. 48-55. L. transv. ^. Vert. 23/22. 

 The height of the body is contained thrice and one-fourth or thrice and one-third in 

 the total length (without caudal), the length of the head four times and one-third or 

 four times and two-thirds. The maxillary does not quite extend to below the centre of 

 the eye. Snout as long as the eye in young examples, but much longer in adult ones. 

 Interorbital space convex, its width being much more than the diameter of the eye in 



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