5. ACAEA. 277 



Labrus (bmnneus), Gronov. Mm. Ichthyol. p. 36. no. 87. 



Spams, sp., Groiior. Zotiphi/l. p. 64. no. 223. tab. 5. fig. 4. 



Jyalinis biiuaetilatus, L. <S^/.v<. Nat. i. p. 477. 



I'cica l)iiiiac'iilata, Jil. vi. p. 82. tab. 310. fig. 1. 



{'iclila biniaciilata, HI. Schn. p. 338. 



Labins piinctatns, lil. tab. 295 ; £1. Schn. p. 251. 



Chromis tieuia, Beiin. Proc. Cumm. Zool. Soc. i. 1830, p. 112; Utorer, 



Syn. Fish. N. Amer. p. G8, and 3Iefn. Am. Acad. ii. p. 520. 

 Acara gronovii, Ileck. I. c. p. 361. 

 — : — punctatus, Heck. I. c. p. 300. 



niargarita, Heck. Brnsil. Fluss-Fi^che, p. 338. 



Cychlasoma taenia, Gill, Ann. Lye. Nat.Hist.New York, vi. Fish. Trinid. 



p. 23 (sep. cop.). 



^- io^r ^- 8=9- ^- ^^*- 2^- ^- transv. 3/9. Vert. 13/13. 



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 whitish 

 superiorly 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 the eye and nostril. 



Guiana, lliver Guapore (Brazil). Trinidad. 



a. Adult. Trinidad. From the Collection of the Zoological Society. 



— Tj-j^e of Chromis tamia. 

 h-e, f, ff, h-i, k, I, m, n, o, p-r. British and Dutch Giiiana. 

 s-t. Adult and half-gTown. Demerara. Presented by Dr. Hancock. 

 u-tv. Adidt : stuffed. Tropical America. 

 .r. Adult : skeleton. From the College of Surgeons. 

 y. Half-groA\Ti : skeleton. 



The intestinal tract makes two circumvolutions ; there is a ciEcal 

 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 j^air of flat processes on its abdominal sur- 

 face. 



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

 appears to be a variety of this species. 



2. Acara tetramerus. 



Acara tetramerus, Hechl, Branil. Flxss-Fischc, p. 341. 

 diadema, Heckcl, I. c. p. 344. 



^- i^- ^- I- I'- ^^*- 2'5- ^- ^r^^^- 3/9. Vert. 12/12. 



Four series of scales on the clieek, in young specimens three. 

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

 ocellus edged Mith wliitish superiorly at the root of the caud;il fin, 

 the two spots sometimes united by a band ; a dark spot below the 

 orbit; a whitish streak between the eye and nostiil. 



Guiana. Bio Branco (Brazil). 

 a,b,c,(l. Adult, half-grown, and young. Guiana. Presented by Sir 



R. Schoniburgk. 

 e. Adult: skeleton, (iuiana. Presented l>y Sir R. Schomburgk. 



