Fos.s/7 Brpfih's. :^•^'^ 



I have seen from Tafelberg and Donnybrook, there are rarely 

 more than 3 premaxilJary teeth and never more than 7 maxillary, 

 or 9 mandibular teeth. The 4 premaxillary teeth measure 7.2 

 mm., and the <S maxillary 15 mm. The premaxillaries are fairly 

 similar to those in P. trifjonia'jifi^ but the nasals are considerably 

 more convex. The other bones of the skull are very much like 

 those of the better known species, exce])t that the quadi'ato-jugal 

 is a comparatively small l)one, and the postorbital fairly well 

 develo]ied. There is no temporal vacuity. The small temporal 

 vacuity which has been described and figured in the British 

 ]\Iuseum type of P. trigoniceps has, I am inclined to think, been 

 artificially produced ; i f it has not, then it is only exceptionally 

 present. Among the large series of skulls in the Albany Museum 

 there is only one which might support the idea of there being a 

 lateral vacuity, and in all perfectly preserved specimens the tem- 

 poral roof is seen to be without any oj^ening. 



ArchwosHchu^ Cairncrofisi, n.g. et n. sj). 



Hitherto the Ecca beds have ])een conspicuous for the absence 

 of reptilian fossils. Mr^oi<auru>i tenuideu^ occurs in the Ui)per 

 Dwyka shales, and possibly in those of the lower P]cca, but with 

 this possible exception no vertebrate remains have been found 

 throughout the 2,600 feet of Ecca shales and sandstones. Within 

 the last month Mr. J. L. Cairncross, while engaged in boring for 

 water in the Prince Albert district, about 10 miles north-west of 

 the township, was fortunate in discovering some reptilian l)ones 

 in a clay pellet conglomerate bed which i)robably belongs to the 

 lower Ecca series. 



The most satisfactorily pi-eserved specimen is the right maxil- 

 lary bone of a large carnivorous reptile. Unfortunately the 

 matrix is too hard to allow of much in the way of development, 

 but the alveolar margin and the palatal surface are satisfactorily 

 displayed. 



In front there is a large canine tooth of which unfortunately 

 the greater part of the ci'own is lost. The antero-posterior diame- 

 ter of the tooth at its base is probably about 25 mm. Where 



