290 CnROAIIDES. 



7. Heros cyanoguttatus. 



Hei'ichtliys cy!moguttatus,Bair(l^- Gh-ard in Proc. Acad. Nat. Sc. Phi- 

 lad. 1854, p. 25, aud Eep. U.S. Sf Mex. Bound. Surv. Fishes, p. 30. 

 pi. 4. figs. 9-12. 



D. i|. A. g. L. lat. 26. L. transv. 4/13. 



The fold of the lower lip is subeontinuous in the middle ; scales on 

 the cheek in four series. The height of the body is a little less than 

 one-half of the total length (without caudal). Snout subconical, de- 

 tached from the frontal line by a depression above the eye. Brown- 

 ish, with small bluish spots scattered all over the body and fins. A 

 black blotch is sometimes observable on the middle of the spinous por- 

 tion of the dorsal, and another on the dorsal region below the former. 

 A third black blotch at the base of the caudal. Young specimens 

 with dark cross-bands. 



Mexico and Texas. 



a-b. Adult and half-grown. Matamoras. Presented by the Smith- 

 sonian Institution. 



8. Heros facetus. 



Chromis facetus, Jenyns, Voy. Beagle, Fishes, p. 104. 



D. ||. A. 1. L. lat. 25-26. L. transv. 4/9. 



The fold of the lower lip is interrupted in the middle ; four series 

 of scales on the cheek. The height of the body is less than one-half 

 of the total length (without caudal). The width of the tnterorbital 

 space equals nearly two and a half diameters of the eye. Uniform 

 brown. 



Maldonado, Rio Plata. 



The characters have been taken from the typical specimen, which 

 is preserved in the Collection of the Philosophical Society of the 

 University of Cambridge. 



9. Heros psittacus. 



Heros psittacus, Heckel, Brasil. Fluss-Fische, p. 369. 

 ? Hoplarchus pentacanthus, Kaup, Wief/m. Arch. 1860, p. 129. taf. 6. 

 fig. 1. 



D. If. A. |. L. lat. 40. 



The fold of the lower lip is continuous in the middle ; scales on the 

 cheek very small, in ten series. The length of the head is contained 

 once and a quarter in the depth of the body, and thrice and a half in 

 the total length. Prscoperculum notched. The cleft of the mouth 

 is slightly oblique, the maxillary extending nearly to the vertical 

 from the front margin of the eye. Light-brownish : upper parts with 

 rcticidated lines, passing into five bands across the lower parts ; tail 

 with two brown cross-bands. A dark-brown band from the occiput 

 to the eye ; a series of dark-brown spots from the operculum to the 



