146 NEWTON: CRETACEOUS CONCHOLOGY OF S. AFRICA. 
Olcostephanus (Ammonites) Atherstonet, Sharpe 
Olcostephanus (Ammonites) Baint, Sharpe 
GASTROPODA. 
Monodonta Hausmanat, n. sp. 
LAMELLIBRANCHIATA. 
Cucullea Krausst, Tate 
Trigonia Tatei, n. sp.(=T. casstope, Tate non d’Orbigny) 
Seebachia [n.g.| (Astarte) Bronni, Krauss 
During 1884 Professor Rupert Jones? formulated a scheme 
of the geological strata of South Africa in which the Uitenhage 
Beds were severally named, and bracketed Jurassic, in the 
following descending order -— 
(1). Trigonia beds. 
(2). Wood beds. 
(3). Saliferous beds. 
(4). Zwartkop Sandstone. 
(5). Enon Conglomerate. 
Schenck? in 1888 founded the term ‘‘ Utamfunaschichten ” 
Jurassic : 
Uitenhage 
formation 
for the beds previously described by Griesbach as the Izinhluza- 
balungu deposits, which included the Upper Cretaceous rocks 
of South Africa. The Uitenhage formation, named the ‘ Uiten- 
hagenschichten,” he considered Lower Cretaceous, and adopted 
a similar arrangement of its beds to that furnished by Rupert 
Jones. 
Prof. G. A. F. Molengraafe* published a useful chart in 
1890, illustrating the various opinions held by geologists from 
earliest times as to the geological structure of South Africa. In 
tabulating the Cretaceous rocks he gives Schenck’s arrange- 
ment, but brackets the Utamfunaschichten as ‘‘ Obere Kreide” 
(= Upper Cretaceous) and the Uitenhagenschichten as 
“* Neocomian ” (=Lower Cretaceous). 
t On the Geology of South Africa. Mature, 1884, vol. xxx., pp. 553-554- 
2 Die geologische Entwickelung Siid-Afrikas. Peterxmann's Mitteilungen, 1884, vol. 
XXXIV., P. 231. 
3 Schets van de Bodemgesteldheid van de Zuid Africaansche Republiek, etc. Tzjdschr. 
Konink. Nederlandsch, Aardrijksk. Genoots. Jaargang 1890. 
J.C., viii., Jan. 1896, 
