Neiv and Rare Fossils. 57 



Fain. MYLIOBATIDAE. 



Genus MYLIOBATIS, Cnvier. 



MvLlOBATlS MOORABBlNENSis, Chapman and Pritchard. (Plate X., 

 Fig. 57). 



Myliohatis nioorahhinetisis. Chapman and Pritchard. 1907, 

 Proo. Roy. Soc, Vict., vol. xx. (N.S.). pt. i.. p. 60. pi. 

 v., figs. 1-3. 



This species is represented in the Mallee bores in three samples 

 by median palatal teeth. They agree in all particulars with the 

 type examples from Beaumaris, with the exception of the figured 

 specimen from the Mallee, which has a slightly larger number of 

 ■denticles in a given length on the articulating surface. In its 

 slender form and small size, whilst resembling the above species, 

 it seems quite distinct from the living Myliohatis australis, Mac- 

 leay. The type specimens came from a Kalimnan (Lower Plio- 

 cene) horizon. 



Occurrence. — Bore 4, 163-170 feet (Kalimnan or Janjukian). 

 Bore 9, 315-325 feet (Kalimnan or Janjukian). Bore 10. 225-230 

 feet (Kalimnan) — (figd. specimen). 



Fam. SPARIDAE. 



Genus CHRYSOPHRYS, Cuvier. 



(^) Chrysophrys sp. (Plate X., Figs. 58, 59). 



Obseririfions. — Numerous small, rounded, grinding teeth occur 

 in the clay washings from one or two of the Mallee bores. They 

 are exactly comparable with those found in the 8ea-Breams or 

 Chrysophrys, living at the present time in Australian seas. When 

 the basal surface is examined the structure is .seen to be the same 

 as in the living genus mentioned. Their occurrence as isolated 

 teeth show them to be easily detachable from their cartilaginous 

 setting, and therefore different from the closely paved pharyngeal 

 dentition in Labrodon. Towards the base the tooth is frequently 

 surrounded by a distinct cincture at its junction with the socket. 

 The apex of the tooth is often worn, and shows a conoentrir struc- 

 ture. 



Occurrence. — Bore 3, 201-220 feet (Kalimnan or Janjukian); 226 

 feet (Janjukian). Bore 8, 210-219 feet (Kalimnan or Janjukian). 



