^98 CHK0MIDE8. 



the form of indistinct vertical bands ; a round black spot in the middle 

 of the root of the caudal ; the outer parts of the fina blackish. 

 Length of the largest specimen 7 inches. 



23. Heros intermedius. 



D.'i^. A.±^. L. lat. 32. L. transv. 5/13. 



The fold of the lovfer lip is interrupted in the middle ; five or six 

 series of scales on the cheek. The height of the body is contained 

 twice and three-fifths in the total length (without caudal). Brown- 

 ish : lower parts red in adult specimens ; a broad angular brown 

 band on the trunk, its horizontal branch extending from the gUl- 

 opening to the vertical from the first anal spine, whilst its vertical 

 branch ascends to the hinder dorsal spines. Each scale within this 

 band with a black vertical streak. A rather narrow brown band 

 runs from the angular band to a blackish spot at the root of the 

 caudal. Vertical fins with whitish ocelli, enclosed by reddish streaks. 



Guatemala. 



a-c. From five to six inches long. From the Collection of Messrs, 

 Salvin and Godman. 



Description. — The length of the head is contained thrice and a 

 fourth in the total (without caudal). The eye is not very remote 

 from the profile of the nape, which is curved. Head as high as long ; 

 prseorbital scarcely wider than the orbit. Cleft of the mouth rather 

 narrow, horizontal, with the jaws equal anteriorly, and with the 

 maxillary not extending backwards to the vertical from the front 

 margin of the eye. The teeth in the outer series are the largest, and 

 provided with brown tips. Opercles scaly. 



Base of the soft dorsal and anal with scarcely any scales ; dorsal 

 spines of moderate length and strength, the length of the twelfth 

 being one-third or nearly one-third of that of the head. The soft 

 dorsal and anal extend slightly beyond the root of the caudal. The 

 free portion of the tail is nearly as long as high. Caudal subtrun- 

 cated, its length being one-fifth of the total. Pectoral shorter than 

 the head, but rather longer than the ventral, which extends nearly 

 to the vent. 



This species is closely allied to H. nebulifer and //. angulifer, from 

 which it may be distinguished by its colours and by the size, of its 

 scales. 



24. Heros angulifer. 

 D. '-?. A. -. L. lat. 33. L. transv. 4/12. 



10 8 ' 



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

 of scales on the check. The height of the body is two-fifths of the 

 total length (without caudal). Brownish -olive, with a broad angular 

 black band on the trunk, its horizontal branch extending from the 

 eye to the vertical from the first anal spine, whilst its vertical brajich 

 ascends to the hinder dorsal spines. Some scales within the band 



