The osteology of Cromeria nilotica and Galaxias attenuatus. 65 
the Salmon, and the rest of the hyoid arch, with its large ossified 
and dentigerous basihyal (Fig. L hy.b), is quite typical. The only 
other feature, of importance, in which this apparatus differs from that 
of Cromeria, is the unmodified disartete condition of the palato-ethmoid 
articulation (Figs. C and E). As in other Teleosts of lowly af- 
finity e. g. Salmon and Pike, a well marked maxillary process is absent. 
The single pterygoid bone resembles that of Cromeria in shape, but 
unlike that it bears a number of large teeth along the inner border. 
The palatine is edentulous ‘). 
All the opercular bones, and five branchiostegal rays are present. 
The gape is bounded mainly by the large dentigerous premaxilla. Of 
the suborbital series of bones two alone remain. 
Looking at the branchial skeleton of Cromeria from the side 
(Fig. H), the first feature which strikes one is the position of the 
dorsal portion relatively to the ventral. In other bony fishes e. g. 
Figs. H—K of Cro- 
MENT 29 1) Kies. ID, 
M of Galaxias. 3:1. 
Fig. H. Lateral view 
of the whole branchial 
skeleton. Figs. J and L. 
Ventral view of the basal 
elements. Figs. K and M. 
Dorsal view of the pha- 
ryngobranchials. 5 
br. b 1—5 basibranchials 1—5, br.c ceratobranchials 1—5, br.e 
1—5 epibranchials 1—5, br. h 1—4 hypobranchials 1—14, br.p 1—5 
pharyngobranchials 1—5, hy. b basihyal. 
1) Günturr probably mistook the pterygoid for a palatine when 
he stated that teeth were present on this bone (Brit. Mus. Cat. of 
Fishes, V. 6, 1866, p. 208). 
Zool. Jahrb. XVIII. Abth, f. Morph. 5 
