^Q6 DORAS. 



half as in the figure of Spix ; and the tail appears 

 to have been nearly square. 



The foniiula of the fins, in Spix and Valenciennes, 

 agree nearly; in our notes, we regret they have 

 been omitted. (\.) Doras ni^er^Y alejic. ; (2.) Z). 

 Humloldtii^ Agas. 



(1.) B.8.— D.l/G— P.]/10_A.11_V.7— C.17— Cost.pl. 24. 

 (2 ) 16/6 



" D. Niger, Valenc. — (Ore edentulo). Corpore nudo laevi, 

 scutellis trigonis in utroquc latere 24. Caput magnum 

 elongatum, antice acutum, clj-peatum. Labia crassa, 

 cirrosa. Cirri sex, duo ad rictum ; quator requales 

 brevissimi, in maxilla inferiore. Seutella lateralia, quo- 

 rum priora quatuor, inermia, caetera triangularia, acu- 

 leata. Pinna adiposa porrecta, angustata."f 



Regarding another doubtful species, Mr. Schom- 

 burgk says : — " The following account of a species 

 of Doras, or one of the Callychthidae, has been 

 politely furnished to me by Dr. Hancock, who, 

 himself a long resident in Guiana, made several 

 excursions into the interior, and accompanied, in 

 1810 and 1811, an expedition which the colonial 

 government of British Guiana dispatched at that 

 period into tlie interior with a view to inquire into 

 the feuds of the natives. 



" Mailed Fish caught at the OrooporaryX^ Dec. 26, 

 1811. — Amongst these falls, in a very shallow rapid, 

 one of our Carib guides caught a singular fish, 



f Humboldt, Zool. Researches, ii. p. 184. 

 :J; A cataract on the river Essequibo, in about 4 deg. 38 min. 

 north latitude. 



