1518 Bulletin. 47, United States National Museum. 



1905. CICHLASOtfA FENESTRATUM (Giinther). 



Head 3; depth 2. D. XVI or XVII, 12; A. V or VI, 9; scales 14-33-13. 

 Vertebrae 14 -{-15. Head as high as long; snout of moderate extent, 

 slightly elevated, the preorbital somewhat wider than orbit; cleft of 

 mouth small, horizontal, jaws equal anteriorly; eye below upper profile, 

 nearer to extremity of snout than to that of operculum; interorbital 

 space convex, wider than orbit. Vertical fins very slightly scaly at base; 

 dorsal spines moderately strong, length of twelfth that of head ; the soft 

 dorsal and anal pointed, their points not extending to middle of caudal ; 

 caudal rounded; distance between dorsal and caudal less than greatest 

 depth of free portion of tail; pectoral shorter than head; ventral pointed. 

 Fold of lower lip interrupted in middle; 5 series of scales on cheek. 

 Brownish green, with 6 dark cross bands, less distinct in old individuals 

 than in young ones, crossing a deep-black longitudinal band which runs 

 from above pectoral to middle of root of caudal; vertical and ventral 

 fins blackish, darkest at base and margins. Length 6 inches. Rivers of 

 southern Mexico, (fenestratus, with window-like or lattice-like markings.) 



Chromis fenestrata, GUNTHER, Proc. Zool. Soc. Lond. 1860, 318, Rio de la Lana, Mexico. 



(Coll.M. Salle.) 

 Heros fenestratus, GUNTHER, Cat., iv, 286, 1862. 



1906. CICHLASOMA MONTEZTJMA (Heck el). 



D. XVI, 11; A. V, ; lateral line 30. Fold of lower lip interrupted in 

 middle; 5 series of scales on cheek. Body with 6 dark cross bands, the 

 last around root of caudal and marked with a black spot. (Heckel.) 

 Mexico. A scarcely known species. (Montezuma, the last king of the 

 Aztecs. ) 



Heros montezuma, HECKEL, Brasil. Fluss-Fische, 383. 1840, Mexico ; GUNTHER, Cat., iv, 

 296, 1862. 



1907. CICHLASOMA MACRACANTHUM (Giintlier). 



Head 3j depth li. D. XIV or XV, 12 or 13; A. V, 9 or 10; scales 

 5^-31-15 . Head rather higher than long, nape convex, but upper profile 

 showing a slight concavity above snout. Snout of rather considerable 

 extent, height of preorbital $ more than width of orbit; cleft of mouth 

 slightly oblique, preorbital almost covering posterior end of maxillary, 

 which does not attain line of front margin of eye ; jaws rather protractile, 

 armed with a broad band of villiform teeth, those of outer series enlarged: 

 interorbital space convex, nearly twice width of orbit; eye somewhat 

 nearer to end of operculum than to that of snout; base of soft dorsal and 

 anal with a few small scales; dorsal and anal spines strong; first dorsal 

 spine a little before vertical from upper end of gill opening; twelfth dorsal 

 spine a little less than -J length of head in adults, fifteenth longest, and 

 more than length of head; soft dorsal and anal much elevated, middle 

 rays produced; caudal rounded; pectoral rounded, about as long as head; 

 first ventral ray slightly prolonged ; free portion of tail nearly twice as 

 deep as long. Lower lip interrupted in middle. Scales on cheek in 5 

 series. Greenish or brownish olive; fins black; a more or less distinct 



