Tjabmis (bruniieus) Ifnoiov. 3Im. Ichthyol. p. 30. no. 8 



Spams, sp., Gronor. Zufrphijl. p. 04. no. 228. tab. 5. fiir. 4. 



Labrus biniaculatus, L. Si/.st. A'at. i. p. 477. 



I'erca biraaculata, HI. vi.'p. 82. tab. 310. fijr. ]. 



Ciclila biniaculata, HI. Sr/ui. p. 338. 



Labrus punctatus, L'l. lab. 2U5; HI. Scfnt. p. 25^ 



Cbromis tajuia, lienn. Proc. Comm. Zool. Soc. i. !.S30, p. 112; IStonr, 



Syn. Fish. N. Amer. p. 08, and Mem. Am. Ai ul. ii. p. 520. 

 Acara gronovii, Hcch. I. c. p. 301. 



puuctatus, Heck. I. c. p. 300. 



margarita, Heck. Brasil. Flmx- Fischc, \). 338. 



Cychlasoma taenia, Gill, Ann. Lye. Nat.Hist.Neiv York,\\. Fish. Trinld. 



p. 23 (sep. cop.). 



D.j-ii-j. A.^. L. lat. 24. L. transv. 3/9. Vert. 13/1 3. 



Three series of scales on the cheek. Brown, with a black spot on 

 the middle of the sides, and with a black ocellus edged with whitisli 

 superioi-lj at the root of the caudal fin ; generally a dark spot below 

 the orbit ; sometimes a blackish band from the eye to the lateral spot ; 

 a whitish streak between tho eye and nostril. 



Guiana, liiver Guapore (Brazil). Trinidad. 



(/. Adult. Trinidad. From the Collection of the Zoological Society. 



— Type of Chromis tania. 

 h-e,f, (/, h-1, k, I, m, n, o, p-r. British and Dutch Guiana. 

 s-t. Adult and half-grown. Dcmerara. Presented by Dr. Hancock. 

 %i-w. Adult r stuffed. Tropical America. 

 ,v. Adult skeleton. From the College of tSurgcons. 

 y. Half-grown : skeleton. 



The intestinal tract makes two circumvolutions ; there is a ca^cal 

 sac, as long as the abdominal cavity, near the entrance of the oeso- 

 phagus in the stomach. The fourth vertebra of all the species of 

 Aaira examined has a pair of flat processes on its abdominal sur- 

 face. 



Acara matyinatiis (Heck. I. c. p. 350), with the scales black-edged, 

 ai)pcars to be a variety of this species. 



2. Acara tetramerus. 



Acara tetramerus, Heckel, Bnisil. Fluss-Fisclte, p. 341. 

 diadema, Heckel, I. c. p. 344. 



^- Io':Ti- ^- I- ^- ^'^*- ^^- ^- transv. 3/9. Vert. 12/12. 



Four scries of scales on the cheek, in young specimens tlirce. 

 Brown, with a black spot on the middle of the sides, and with a black 

 ocellus edged with whitish superiorly at the root of the caudal fin, 

 the two spots sometimes iinited by a band ; a dark S])ot below the 

 orbit; a whitish s'rcak botAvecn the e^o and nostril. 



Guiana. Bio Branco (Brazil). 



n,b,c,d. Adult, half-giown, and young. (Juiana. Breseuted by Sir 



II. Schoni])urgk. 

 f. AdnU : skeleton, (iuiana. rroscnied bv Sir K. Schoml)urgl<. 



