Sonth-Amer'ican Cichlid Genufi Acarn. 337 



3 



anterior arch. Scales 26-28 ^'.,, 1 or 1^ between lateral line 

 and anterior rays of soft dorsal. Dorsal* XIV-XV 10-11, 

 commencing: above opercular cleft, the spines increasin{^ in 

 lenjith to the last, which is nearly | the length of head ; 

 fourth spine nearly \ the length of head ; soft fin pointed, 

 the longest rays extending to tlie middle of caudal. Anal 

 III 8-9. Dorsal and anal fins scaleless. Pectoral nearly 

 as long as the head ; ventral extending to or a little beyond 

 origin of anal ; caudal subtruncate or rounded. Caudal 

 peduncle g-f as long as deep. Olivaceous, with 5 dark 

 cross-bars, the third bearing a blackish blotch below the 

 lateral line ; sides of head and anterior part of body with 

 blue spots ; 2 or 3 oblique blue lines from eye to maxillary ; 

 fins dusky, the posterior part of the soft dorsal with oblique 

 series of spots, the caudal obscurely spotted. 

 Panama; North-western Ecuador. 



1-2. (129 and 134 mm.) Rio Chagres. O. Salvin, Esq. 



3-4. (102 and 142 mm.) N.W.Ecuador. Mr. Ivosenberg. 



7. Acara cequinoctialis, sp. n. 



Chrouiis rivulata (part.), Giinth. Proc. Zool. See. 1859, p. 418. 

 Acara pulchra (part.), Giinth. Cat. Fish. iv. p. 280 (18(J2). 

 Acara rhndata (part.), Bouleng. Boll. Mus. Torin. xiv. 1899, no. 335, 

 p. 5; Pellegr. Mem. Soc. Zool. France, xvi. 1903, p. 177 (1904). 



Depth of body 2-2^ in the length, length of head 2g-2f . 

 Snout shorter than postorbital part of head. Diameter of 

 eye 24-3f in the length of head, interorbital width 2^-3. 

 Depth of prseorbital equal to the diameter of eye or less. 

 Maxillary extending to the vertical from anterior margin of 

 eye; jaws equal anteriorly ; fold of the lower lip not con- 

 tinuous ; cheek with 3 series of scales ; praeoperculum 

 scaleless ; 8 or 9 gill-rakers on the lower part of anterior 

 arch. Scales 25-26 |^|, 1^ between lateral line and anterior 

 rays of soft dorsal. Dorsal XIII-XV 10-12, commencing 

 above the opercular cleft, the spines subequal from the fifth, 

 Mhich is more than 'i the length of head; soft fin pointed, 

 extending nearly to middle of caudal. Anal ill 8-9. Dorsal 

 and anal tins scaleless. Pectoral at least as long as the head ; 

 ventral extending to origin of anal or beyond. Caudal sub- 

 truncate or rounded. Caudal peduncle |-| as long as deep. 

 Olivaceous, with darker cross-bars, the first crossing tlie first 

 7 or 8 scales of the lateral line, the second tlie 9th or 10th 

 and 3 succeeding scales of the lateral line, bearing a large 



* Of the four specimens three have fifteen dorsal spines. 



