1. STERNARCIIUS. ',i 



end of the snout than to the gill-opening ; the mouth is cleft to 

 below the orbit ; vent immediately behind the vertical from the 

 orbit. Brown or black, with a white band along the median line 

 of the upperside of the head, sometimes extending along the back ; 

 the thin portion of the tail with two white rings. A. 140-102. 

 Brazil and Surinam. 



a. Half-grown, Para. (A. 151.) 



h. Half-grown. Santarem. From ^[r. Bates's Collection. (A. 140.) 



c. Adult. (A. 153.) 



2. Sternarchus brasiliensis, 



Reinhardt, Vidciii^l;. Medilel. natitrli. Foren. Kjoboih. 1852 (1853) ; or 

 Wicc/m. Arc/i. lSo4, p. 182. 



Closely allied to St. aJhifrons. 



Uniform dark brown. Mouth rather short. Eyes very small. 

 Vent at a short distance behind the eyes. A. 1 77-185. 

 Rio das Velhas. 



3. Sternarchus nattereri. 



SteiiKlncJi/icr, Sifz(/sl>cr. Ak. IJ'i'ss. Wicii, 18G8, Iviii. p. 251, taf. 2. 

 fig. 1. 



The upper profile of the snout descends in a strong ciirve from 

 the nape to the mouth. The length of the snout is rather less than 

 one-half of that of the postorbital part of the head ; mouth small, 

 scarcely extending to the minute eye. Vent below the eye. Inter- 

 maxillary teeth none. The depth of the body is once and a half the 

 length of the head. Uniform brownish. A. 197. (Steind.) 



Barra do Rio Ner;ro. 



4. Sternarchus schotti. 



Stcindachner, I. c. p. 252, taf. 1. figs. 1, 2. 



The upper profile of the snout is but little convex ; length of the 

 snout rather less than one-half of that of the postorbital part of the 

 head. Mouth small, not extending to the eye. Intermaxillary teeth 

 forming a double series. The depth of the body equals the length 

 of the head. (Steind.) 



Barra do Rio Negro. 



5. Sternarchus bonapartii. 



Casteht. I. c. p. 92, pi. 45. fig. 2; Kaup, Apod. p. 12G. 



UnifoiTu b^o-s^^ai■sh ; head blackish. Cleft of the mouth very wide, 

 extending behind the ej-es. Vent before the e}es, at a short distance 

 from the mandibulaiy symphysis. A. 1G5. 



River Amazons. 



This species appears to have been described from a skin. 



Jt2 



