466 DR. GUNTHER ON THE FISHES OF CENTRAL AMERICA. 



the soft portions of the dorsal and anal slightly produced, the former extending nearly 

 to the middle of the caudal. Free portion of the tail as high as long. Caudal slightly 

 emarginate, its length being considerably more than one-fifth of the total. The ventral 

 has the outer ray much produced, and reaches to the sixth anal spine. 



183. Heros godmanni. (Plate LXXIV. fig. 5.) 

 (iruiith. Fish. iv. p. 296. 



D. Il^i-^. A. §. L. lat. 33. L. transv. 5/13. 



The fold of the lower lip is interrupted in the middle ; six or seven series of scales on 

 the cheek. The height of the body is contained twice and three-fourths in the total 

 length (without caudal), the length of the head thrice or thrice and a third. The 

 profile of the nape is much curved. Head rather longer than high ; snout rather 

 elevated, the prseorbital being 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 nape is elevated, and 

 the orbit considerably below the upper profile of the head. Dorsal and anal fins very 

 slightly scaly at the base ; the spinous dorsal is low, the length of the twelfth spine 

 being one-fourth of that of the head. The free portion of the tail is a little longer 

 than high. Head greyish olive ; cheeks and body reddish olive ; an irregular blackish 

 band proceeds from above the pectoral to a black spot in the middle of the root of the 

 caudal. A black spot above the origin of the lateral band. Opercles, back, and vertical 

 fins with black dots. 



Two specimens, 7 inches long, were collected by Mr. Salvin in the River of Cahabon. 



184. Heros sieboldii. 

 Kner & Steindachner, Abhandl. bayer. Ak. Wiss. x. (1864) p. 13, Taf. 2. fig. 2. 



This fish is probably not sufficiently distinct from H. godmanni ; it is from New Gra- 

 nada, and the dark markings are arranged in irregular cross bands. 



185. Herds guttulatus. (Plate LXXVIII. fig. 3.) 

 Gunth. Proc. Zool. Soc. 1864, p. 152. 



D. jg. A. g. L. lat. 33. L. transv. j|. 

 Very closely allied to H. godmanni. 



The fold of the lower lip is interrupted in the middle. The height of the body is 

 contained twice and three-fifths in the total length (witliout caudal), the length of the 

 head thrice and a fifth. Head as higli as long. The upper profile of the head descend- 

 ing in a gentle curve. Scales on the cheek in four or five series. The first dorsal spine 



