GILBEKT AND STAllKS— FISHES OF PANAMA HAY 99 



Vc'iUrals small and aiitc-rior in i)usilion, as in the Kyfiticiiuc, consistinji each of i stronp 

 spine, and 5 liranched rays, their base beiny in front of base of pectorals; no enlarged scale behind 

 base of ventrals. Vertical fins low, with rounded lobes, their basal portions well scaled; dorsal with 

 7 low strong spines anti 22 i)rofusely brancheil rays; anal with 3 spines and 18 rays. One species, 

 apparently the type of a distinct sub-family, Khci^matinu:. 



179. Rhegraa thaumasium G'dherl. 

 I'l.ATK. XV, Fic. :ti. 

 R/ugtiia I ha II HI as ill III GiLiiEKi, I.e., p. 3170. 



Head 2 J in length; depth 3; eye 5 in head; U. VII, 22; A. Ill, i.S. Scales 45 in a longitu- 

 dinal series along middle of side. 



Body elongate, moderately comj^ressed, with very short, deep, caudal |jeiiuncle. Anterior 

 profile strongly arched, slightly itepressed above orbits. Interorbital space very narrow, convex, its 

 wiihh two-thirds diameter of orbit. Mouth large, slightly oblique; lower jaw the longer, its tip enter- 

 ing the profile. 



Dorsal spines low, strong, increasing backward, the last spine one-fourth longer than diameter 

 of orl)it. Anal spines short and strong, the middle spine longest. 



Lateral line curved strongly upward from its origin to below third dorsal spine; thence run- 

 ning parallel with the back to below middle of second dorsal, from which point it gradually approaches 

 the base of the dorsal, where it terminates uniler the fifth ray from the last; along its anterior course 

 it is separated from base of dorsal by from 4 to 6 scales (in oblique series). Scales minutely ctenoid 

 except on head, breast, and belly, on nape under anterior dorsal spines, and on base of pectoral. Top 

 of head scaled forward to interorbital space, the anterior scales here, as well as those on cheek, much 

 reduced in size, embedded, so that their outlines cannot be distinguished. 



The following measurements of the type sjiecimen are given: 



mm. 



Total length 85 0ue.b«.ulreJtl.8 



■ '^ of Icnutli to 



Length to base of caudal 70 base of caudal. 



Greatest depth 33 



Least dei)th of caudal peduncle 15! 



Length of caudal peduncle 8 



Distance from tij) of upper jaw to end of opercular flap 37 



Length of snout 6 



Diameter of eye 72 



Interorbital width 3 J 



Tip of snout to end of maxillary 19 



Length of pectoral 27 



Tip of snout to base of upper pectoral ray 35 



Tip of snout to base of ventrals 3 ' 



Length of ventrals 13 



First anal spine 3i 



Second anal spine 6 



Third anal spine 4 1 



First soft anal ray 81 



Longest soft anal ray 15 



First dorsal spine 4 



Last dorsal spine 9 



Longest dorsal ray 15 



Caudal 23 



