202 
I'HOF. D. M. S. WATSON AND MR. K. L. GILL ON THE 
dental plates of a normal Dipnoan structure, lie gave no further account of 
them, and never published any figures in illustration of his description. In 
1891 Dr. Smith Woodward gave a figure of an isolated " splenial," since 
when no further details have been published. 
The types are in the Royal Scottish Museum, and between them make the 
structure nearly completely known. 
Fig. sob. 
Uronemus splendens, Ti'fiq. Drawn from plasticene squeezes of a specimen iu the 
Royal Scottisli Museum. X 1. 
A. Dorsal surface of liead. Fu., frontal ; I.Fb., interfrontal ; I.Tem., intertemporal ; 
L.Ang., left angular ; L.Den., left dentary ; L.P.Art., left pre-articular; L.Pt., 
left pterygoid ; BIx. P, maxilla; N A., nasal ; P.O.. post-orbital ; P.V., prevomer ; 
Pb.Fh,., prefrontal ; P.Mx. P, premaxilla ; Pab., parietal ; RAng., right angular ; 
R.Den., right dentary ; R.P.Art., right pre-articular ; R.Pt., right pterygoid. 
B. Ventral surface of head. Reference letters as before, with C.Hy., ceratohyal; Clei., 
cleithi'um ; Op., operculum ; Par.Sp., parasphenoid. 
The best specimen is a nearly complete small fish, preserved mainly as an 
impression in slab and counter slab. 
I have prepared it by removing the scanty remains of bone from the 
impressions, and studied it in plasticene squeezes, which reproduce all surface 
