are clearly transitional. For example, the beginning of the anal fin 

 may occur immediately behind the last ray of the dorsal fin, or be 

 shifted farther back by 1 — 2 vertebrae in E. cf. koraensis Danil., and 

 by 3 — 4 vertebrae in E. menneri Danil. 



In view of these distinct passages in the fundamental specific char- 

 acters, as also in the lack — mentioned above — of structural differ- 

 ences in the organs of the anal group in both species of genus Eomyc- 

 tophum Danil., they should perhaps be regarded as conspecific though 

 subject to strong variations concerning the position of the anal fin and 

 the ventral fins. This supposition is supported by the variations curves 

 (Figs. 12, 13) plotted for the variability range of the position of the 

 anal and ventral fins in E. menneri Danil. and E. cf. koraensis Danil. 

 The position of these fins is expressed as a percentage of the body 

 length without the caudal fin as represented by the preanal and the 

 preventral areas. Although the mean value of the two indices displays 

 differences, yet their variability ranges partly overlap. 



Order Perciformes 



Suborder Percoidei 



Family Carangidae 



Genus Equula Cuvier, 1815 



Equula ? sp. 



(Fig. 14; PI. IV, Fig. 1) 



Material: one incomplete specimen, with head skeleton well pre- 

 served; of the trunk — only the scales and rays of fins. 



Dimensions (in mm) 



Body length without caudal fin 24.4 + ? 



Maximum body depth 11.7 

 Length of head to posterior border 



of operculum 7.8 



Horizontal diameter of orbit 3.8 



Predorsal area 11-6 



Preanal area 17.7 



Description. The body of this fish was rather deep; the maximum 

 depth probably represented about 50 percent of the body length with- 

 out the caudal fin. The dorsal profile is almost straight, while the 

 ventral is arcuate (Plate IV, Fig. 1). The head is short, deep, the orbit 

 relatively large (Fig. 14). 



The skull. A high occipital crest, and the parasphenoid which trav- 



34 



