1868.] DUNCAN CEETACE0T7S ROCKS OF SINAI. 45 



Wady Bader. One Echinoderm, Heterodiadema Lihycum, Agass. et 

 Desor, sp., was noticed to afford some evidence of the zone of Hippu- 

 rites in Sinai ; and now Dr. Le Neve Foster in his section (cf. Tih) 

 points out the existence there of Hippurites ; and Mr. Banerman's col- 

 lection contains some from Wady JS^agh el Bader. The propriety of 

 the assertion that a Turonian as well as a Cenomanian chalk existed 

 in Sinai is therefore to be admitted. Mr. Bauerman and his col- 

 leagues have added by direct observation a higher stage to that 

 previously known to exist amongst the Cretaceous series in the 

 west of the Sinaitic peninsula. There are slight evidences of the 

 existence of a chalk over the Hippurite -limestone ; but this must be 

 stratigraphically the base of the white chalk of North-western Eu- 

 rope. 



No fossils are in the collection now under consideration, nor were 

 there any in Mr. Holland's, pointing to a Neocomian, Gault, or Upper 

 Chalk horizon (chalk with ffiboits). 



A study of M. Coquand's * Geologic et Paleontologie de la Region 

 sud de la province de Constantino' (1862), and the examination of 

 a collection of Algerian fossils in the possession of John "Wickham 

 Flower, Esq., F.G.S., place the affinities and distribution of the 

 Sinaitic Cretaceous fossils in a very definite relation with those of 

 the following etages : — 



1. Khotomagien, 2. Mornassien, 3. Provencien, 4. Santonien? 



The Rhotomao-ien is the African zone of : — 



Ammonites Mantelli, Sow. 



rhotomagensis, Brongn. 



varians, 8ow. 



Scaphites sequalis. Bow. 

 TurriUtes costatus, Lam. 

 Pecten asper, La^m,. 



It contains a considerable number of Echinodermata and Ostreae ; 

 and the commonest of these are found in Mr. Banerman's collection. 



Coquand's Carentonien (the zone of Asjjidiscus cristatus, Lam. sp.), 

 has not been traced in the Sinaitic chalk, nor has his Angoumien 

 series ; but the Mornassien, the zone of the Echinodermata par 

 eoccellence, immediately beneath the zone of Hippurites cornu vacci- 

 num, and the Caprotinas (the Provencien) are well represented 

 there. The Provencien is distinguished in the present collection by 

 the Caprotinas. 



The following is a list of the species found by Mr. Bauerman, with 

 their localities in Sinai, Algeria, Europe, and in other parts : — 



1. Discoidea subuculus, Klein. Tih: Rhotomagien, Upper Greensand. 



2. ForgemoUi, H. Coquand. Tih : Rhotomagien. 



3. Epiaster distinctus, Agass. Wady Nagh el Bader : Zone oi Pecten asper and 



N.E. Arabia. 



4. tumidus, Desor. W. N. B. : Cenomanien, France*. 



5. Periaster oblongus, D'Orh. W. N. B., Tih: Cenomanien, France. 



6. Hemiaster Cenomanensis, Cotteau. Tih, W. F., W. N. B. : Cenomanien, 



France; Bagh. 



7. Pbymosoma Delamarrei, Desor. W. N. B. : Mornassien. 



8. Pseudodiadema variolare, Brongn., sp. W. N. B., Tih: Upper Greensand, 



Ked Rock. 



* W. N. B. = Wady Nagh el Bader. W. F. =-- Wady Ferrari. 



