344 Mr. C. T. Regan 07i the Fishes of the 



18. Acara Maroii'u. 



Acnra Maronii, Steind. Deuk.«chr. Ak. Wieu, xliii. 1882, p. 141, pi. il, 

 fig. 4 ; Pellegr. M^m. Soc. Zool. France, xvi. 1908, p. 179 (1904). 



Depth of body 1§-1| in the length, length of head 3. 

 Snout considerably shorter than postorbital part of head. 

 Diameter of eye 3 in the length of head, interorbital width 

 2^. Depth of preeorbital | the diameter of eye. Maxillary 

 extending to the vertical from anterior margin of eye ; jaws 

 equal anteriorly ; fold of the lower lip slightly interrupted ; 

 cheek with 3 senes of scales, prseoperculum with 1 or 2 

 series ; 5 or gill-rakers on the lower part of anterior arch. 

 Scales 24 '^. Dorsal XV 10-11, commencing above the 

 opercular cleft, the spines not or but slightly increasing in 

 length posteriorly, the last ^ the length of head, the longest 

 soft rays produced to or beyond the end of caudal. Anal 

 III 9-11. Soft dorsal and anal strongly scaly at the base. 

 Pectoral as long as tlie head; ventral extending beyond 

 origin of anal, sometimes nearly to the posterior end of base 

 of anal ; caudal rounded. Caudal peduncle \-^ as long as 

 deep. Brownish ; a blackish curved band from origin of 

 dorsal through eye to suboperculum ; a blackish blotch above 

 the lateral line below the posterior dorsal spines. 



Guiana. 



1-2. (83 and 87 mm.) Surinam. Mr. Kappler. 



3, (77 mm ) Demeraia. F. G. Beckford, Esq. 



Nann ACARA, gen. nov. 



Closely allied to Acara, but the upper lateral line runs 

 obliquely upwards to the spinous dorsal, from Avhich it is 

 separated by only half a series of scales for most of its 

 length. 



A single species from the Essequibo. 



Nannacara anomala, sp, n. 



Acara punctulata (pari.), Giiutli. Ann. & Mag. Nat. Hist. xii. 18G3, 

 p. 441. 



Depth of body 2| in the length, length of head 3. Snout 

 much shorter than postorbital part of head. Diameter of 

 eye 3 in the length of head and greater than the interorbital 

 width. Depth of prseorbital }^ the diameter of eye. Max- 

 illary extending to below the eye; jaws equal anteriorly; 

 fold of the lower lip continuous; cheek with 2 series of 

 scales, prseopercuhun with 1 series ; 5 or G gill-rakers on the 



