186 
SELACHII. 
1883. Sandalodus morrisii , J. \V. Davis, Trans. Roy. Dublin Soc. [2] 
vol. i. p. 437, pi. liv. figs. 1-6. 
1883. Vatieinodus sp., St. John & Y orthen, Pal. Illinois, vol. vii. p. 81. 
1883. Deltodopsis sp., St. John & Worthen, tom. cit. p. 160. 
Type. Detached dental plates ; British Museum. 
A very large species, the long axis of the “ upper ” dental plate 
attaining a length of 0*12, and its maximum breadth being about 
0-055. “Upper” dental plate with anterior ridge, extending from 
the outer apex to the inner border, prominent, its summit angulated, 
placed very near to the antero-lateral border. “ Lower ” dental 
plate much thickened towards the sharply rounded posterior angle, 
and the root extending beyond ; coronal surface moderately convex, 
faintly exhibiting antero-posterior elevations and depressions in its 
anterior portion. 
As already remarked by Davis, the association of the two forms 
of large teeth ascribed to this species, both in the Limestone of 
Bristol and Oreton, seems sufficient proof of their pertaining to one 
and the same fish. The so-called genus Vatieinodus also appears to 
the present writer superfluous, and may be conveniently deemed a 
synonym of Sandalodus ; indeed the type species, T . vetustus , 
appears almost specifically indistinguishable from 8. morrisii. 
Form. Sf Loc. Lower Carboniferous Limestone ; Gloucestershire 
and Shropshire. 
\ -- 
(i.) Triangular Variety (? Upper Jaw). 
P. 202—3. Type specimens figured by Morris and Roberts, tom. cit. 
pi. iii. figs. 2, 3 ; Oreton, Shropshire. Weaver-Jones Coll. 
P.207—9, Three specimens; Oreton. Weaver-Jones Coll. 
42175-42180. Six specimens; Oreton. Baugh Coll. 
41191. Two imperfect specimens, one small; Oreton. 
Purchased , 1868. 
P. 2484, P. 2487. Two broken dental plates, the first figured by 
Davis, tom. cit. pi. liv. fig. 6 ; Oreton. hnniskillen Cod. 
P, 4717. Yery large dental plate, measuring 0-12 from the outer 
apex to the inner border ; Oreton. Purchased , 1884. 
36194. Fragment of small dental plate; Oreton. Purchased , 1861. 
P. 215. Small dental plate, probably of a young individual of this 
species, showing a deep suture-like transverse line near 
the inner margin : Oreton. The specimen is figured by 
Morris & Roberts, loc. cit. pi. iii. fig. 4, and is associated 
