164 PROCEEDINGS OP THE GEOLOGICAL SOCIETY. [Feb. 6, 



The following Eeptilian remains may be noticed among the fossils 

 from Uitenhage. 



1. A small serrated Tooth resembling some belonging to Acakt- 

 THOPHOLis (Huxley, Geol. Mag. vol. iv. p. 65, pi. 5. fig. 4). It was 

 sent to the Geological Society several years ago by Dr. Atherstone, 

 It is imbedded in a greyish sandstone (reddish in part) with cal- 

 careous cement, and is from the " Wood-bed Series." 



2. A small and imperfect femur of a Lacertilian, from the Zwart- 

 kop Eiver Heights (Dr. Euhidge). 



e. General RemarJcs on the Fauna of the Uitenhage Formation. 



The collections of Jurassic fossils from South Africa acquired by 

 the Society since the publication of Mr. Daniel Sharpe's descriptions 

 of Messrs. Bain and Atherstone's specimens contain many new 

 forms, and some few specifically identical with extra-African species. 

 Ey the aid of these new materials, I have been enabled to arrive at 

 a nearer approximation as to the age of the beds which have yielded 

 them. 



The donors to whom the Society is indebted for these valuable 

 acquisitions are Dr. Eubidge, F.G.S., Messrs. Stow and Longiands, 

 Major Eock, and Capt. Harvey. 



The earliest publication of any fossils of Secondary (Jurassic) age 

 from the Cape of Good Hope was by Hausmann in 1837 ; the two 

 species mentioned by him were subsequently figured and described 

 by Goldfuss. Krauss increased this number by the addition of 

 7 species. Mr. D. Sharpe added 22 species to those previously de- 

 scribed ; and the species added by the foregoing descriptions make 

 up a total of 74 species for the Jurassic rocks of South Africa. 



Krauss proposed to place the beds yielding Trigonia Haiismanni, 

 Astarte Herzogii, &c. in the Cretaceous series ; and the evidence 

 afforded by the few species at his command vrarranted that arrange- 

 ment, the Trigonke having affinities with Post-jurassic species. But 

 since then undoubted Cretaceous fossils have been discovered in 

 Hatal ; and these have no affinity whatever with those found to the 

 south in the Uitenhage district. The late D. Sharpe's opinion, that 

 the Secondary fossils from this part of South Africa were com- 

 parable with those which are found in ' the middle and lower part 

 of the Oolitic series,' is much strengthened by the nature of the 

 additional material. 



The great mass of the fossils are Bivalves, which constitute two- 

 thirds of the entire fauna, as far as known. Cephalopods are repre- 

 sented by six species ; but individuals are rare ; the Gasteropoda are 

 fairly represented. A Berenicea, three Ser^idw, a Cidaris, and a 

 Coral are the only representatives (as far as our collection serves) of 

 the several classes to which they respectively belong. 



The extreme rarity of the remains of Cephalopods, Polyzoa, Echi- 

 nodermata, and Madreporaria calls to mind the conditions of life 

 which prevailed during the deposition of the Great Oohte, and in a 

 less degree of the Eorest-marble and the Cornbrash, in this country. 



