Victorian Fossils, Part XX. 139 



Fam. Pristidae. 



Genus Pristis, Latham. 



Prisfis cudmorei, sp. nov. (Plate IX., Fig. 7). 



Descripfio7i. — Dermal teeth of rostrum, flattened-conical and 

 curved; bluntly pointed. Inner, concave edge rounded; the convex 

 margin cultrate. Base nearly straight across, but slightly hollowed 

 below, the surface in contact with the cartilaginous socket of the 

 rostrum being roughened for attachrnent. Surface of tooth even 

 but for a few longitudinal grooves around the base. The surface of 

 the tooth when magnified shows numerous longitudinal striae, very 

 fine and distinct. 



Dimensions of Holotype. — Length of tooth, 17.5 mm.; width at 

 base, 7.5 mm. ; greatest thickness, 4 mm. The smaller specimen has 

 a length of 15 mm. 



Observations. — None of the fossil forms about which I have been 

 able to gather details show any decided resemblance in shape to the 

 above specimens, excepting Prisfis ensichns, Leidy,i from the 

 Miocene phosphate beds of South Carolina, but this form has a 

 straight-sided tooth which is broader at the base. Undoubtedly the 

 nearest representative is the living Prisfis antiquorum, Latham, 

 found in the Mediterranean and the warmer parts of the Atlantic. 

 The teeth of the rostrum in this species are almost identical in shape, 

 especially the anterior teeth, the only difference being the coarser 

 striae on the teeth of the living species. Strangely enough, the Indian 

 and Australian species (P. zysron, Bleek) has dermal teeth of a very 

 different type, they being thick, long and straight, and with a 

 coarse, fibrous structure near the base. 



Occurrence. — Tertiary (Kalimnan). Beaumaris, Port Phillip. 

 Two teeth referred to the above species were found by Mr. F. A. 

 Cudmore, after whom the species is named, in recognition of his 

 many interesting palaeontological discoveries. 



Fam. Myliobatidae. 



Genus Myliobatls, Cuvier. 



Myliohafis moorahhinensis. Chapman and Pritchard. (Plate IX., 



Fig. 8.) 



Myliohafis moorahhinensis. Chapman and Pritchard, 1907, Proc. 



R. Soc, Vict., vol. XX. (N.S.), pt. I., p. 60, pi. V., figs. 1-3. 



1 Journ. Acad. Nat. Sui. Philad., ser. 2, vol. viii., 1877, p. 252, pi. xxxiv., fii-s. 31, 32. 



