56 



WEALDEN AND PURBECK FOSSIL FISHES. 



course of the upper slime-canal is also distinct. In the deepest part of the trunk 

 there appear to be about 8 scales in a transverse series above that traversed by 

 the lateral line, and about 10 scales below this. 



1. Eomesodon barnesi, A. S. Woodward. Plate XIII, fig. 1 ; Text-fig. 22. 



1906. Mesodon barnesi, A. S. Woodward, Proc. Dorset Nut. Hist. Field Club, vol. xxvii, p. 187, pi. b, 

 figs. 1 — 4. 



Type.— Nearly complete fish ; collection of the late F. J. Barnes, Esq. 



Specific Gliaracters. — Elevation of back sharply rounded, and maximum depth 



Fig. 22. — Eomesodon barnesi, A. S. Woodward; incomplete fish, two-thirds nat. size. — Portland Stone 

 (Roach Bed) ; Portland, Dorset, eth., mesethmoid; occ, supraoccipital ; orb., orbit; }>lv., pelvic fin; 

 r.spl., right splenial ; v., vomer. F. J. Barnes Collection. 



of trunk about equalling the total length of the fish to the base of the caudal fin. 

 Teeth smooth, a few of those of the lateral series having a faint apical pit with 

 traces of crimping on the border ; splenial teeth closely arranged, those of the 

 principal series broader than long, flanked within by one row of small round teeth 

 and external^ by three series, of which the median is the smallest, and the outer 

 about equal in size to the inner series. Dorsal tin with about 30, anal fin with 

 about 2o rays. Granulation of external bones and scales coarse; enamelled 

 denticles few and conspicuous on dorsal and ventral ridge-scales. 



