1905.] FISHES OF THE FAMILY CICHLID/E. 155 



2. Batrachops SEMIFASCIATUS. 



Batrachops semifasciatus Heck. Ann. Mus. Wien, ii, 1840, p. 436. 



Crenicichla semifasciata Glinth. Cat. Fish. iv. p. 309 (1862) ; 

 Pellegr. Mem. Soc. Zool. France, xvi. 1903, p. 375 (1904). 



Depth of bod}^ 4-5 in the length, length of head 3-3|. 

 Diameter of eye 4|-5^ in the length of head. Nostril nearer to 

 tip of snout than to eye. Maxillary extending to below anterior 

 margin of eye ; depth of prseorbital 5 the diameter of eye. 

 Anterior teeth forming about 3 series in each jaw. Scales 

 denticulated except on the head, the lower parts of thorax and 

 abdomen and anteriorly above the lateral line, 55-57 in a longi- 

 tudinal series below the lateral line, 22 ^^^ ^ ti-ansverse series. 

 Lateral line 24-26 + 12-15. Dorsal XXII-XXIII 10-12. Anal 

 III 7-10. Pectoral f the length of head. Caudal peduncle about 

 as long as deep. Scales of the sides of the body yellowish with 

 dark brown margins ; a dark stripe from eye to operculum ; 

 sometimes 7 or 8 dark cross-bars on the upper part of the body ; 

 a dark ocellus on the uj)per part of the base of caudal; fins 

 unspotted. 



Rio de la Plata and its tributaries. 



The type, from the R. Paraguay, measures 150 mm. in total 

 length. 



3. Batrachops reticulatus. 



Batrachops reticulatus Heck. Ann. Mus. Wien, ii. 1840, p. 433. 



Crenicichla reticulata Giinth. Cat. Fish. ir. p. 309 (1862). 



Crenicichla elegans Steind. Denkschr. Ak. Wien, xiiv. 1882, 

 p. 15; PeUegr. Mem. Soc. Zool. France, xvi. 1903, p. 378 (1904). 



Depth of body about 5 in the length, length of head about 3 5. 

 Diameter of eye 4-5 in the length of head, length of snout 3^-4, 

 interorbital width 2|-3. Nostril nearer to tip of snout than to 

 eye. Maxillary extending a little beyond anterior margin of eye ; 

 depth of prfeorbital | the diameter of eye or less. Anterior teeth 

 forming about 3 series in each jaw. Scales denticulated except 

 on the head, the lower parts of thorax and abdomen and 

 anteriorly above the lateral line, 66-70 in a longitudinal series 



9 

 below the lateral line, ^ in a transverse series between origin of 



dorsal and ventral fin. Lateral line 23-26 + 11-13. Dorsal XXII- 

 XXIV 11-12, the spines subequal from the tenth, the last ^ the 

 length of head or less. Anal III 8. Pectoral |-|, ventral |-|- 

 the length of head. Brownish, each scale on the side of the body 

 with a dark brown spot at the base and a yellow margin ; a dark 

 stripe from eye to extremity of operculum ; a dark ocellus on the 

 upper part of the base of caudal; spinous dorsal with 3 longi- 

 tudinal series of dark spots, which increase in number to 6 on the 

 soft fin ; anal with or without a few sj)ots posteriorly ; caudal 

 sometimes with dark mai'ginal bands above and below. 



The type of the species, from the Rio JSTegro, measures about 



