Superbranchial Organ in Hypophthalmichthys. 187 
series of gill-rakers. Dr. Giinther * has described the gill- 
rakers as very long, slender, lanceolate; but this is only true 
of the species H. nobilis, Richards.,—H. molitriz, C. & V., 
Hypophthalnichthys molitrix. 
A. Dorsal view of oill-arches, the epibranchials pushed back to show 
the superbranchial organ. B, Side view, the epibranchial 
slightly raised. 
bst. Branchiostegal. cbr. Ceratobranchial. ch. Ceratohyal. ep. Copula. 
ebr, Epibranchial. ef. Epihyal. g. Gill-filaments. g.r. Gill- 
rakers. 2. Superbranchial organ. 
* Cat. Fish. vii. p. 298. 
