202 Mr. R. B. Xewton on Fossil MoUa<c<i tCv. 



It is possible that this fraginetit may belong to Roudaireia 

 r^r?<i of Muuiei-Ohalnias*, tiie type of that genus and the 

 equivalent of Coquancl's anressensis, a well-known shell 

 ranging from Senonian to Danian times, as found in various 

 African localities, e-pecially in Tunis and Egypt. So far as 

 can be seen, tlie specimen appears to differ from VenieUa 

 forhesiana of vStoliczkaf, an allied species of Lower Senonian 

 age from India, Zululand, &o., in being narrower and more 

 delicately constructed in the nmbonal region and in possessing 

 the horizontal character of the ridges ; the specimen also 

 \\ ould appear to have been more compressed, especially near 

 the carination. 



The other related species from India are Cyprina cristata 

 and cordiads of iStoliczka, described antl figured in the same 

 work. 



It is of interest to note that Dr. Solger \ has determined 

 some bivalves from the " Mongokreide " of the Cameroons 

 as belonging to this genus, with resemblances to Roudaireia 

 anressensis, Coquand, sp., but without illii<trations, which 

 would indicate that the Upper Cretaceous rocks of that are.i 

 are continued into Southern Nigeria. 



For the present, however, it is considered best to ret'er 

 Ml-. Parkinson's fragment to the species anressensis with a 

 query, until further material is forthcoming for fuller con- 

 firmation as to its true specific relations. In the meantime 

 the siiecimen is of great "eological interest, as its presence 

 indicates the existence oi Upper Cretaceous deposits belonging 

 somewhere between the Upper Senonian and the Danian 

 stages of that period. In this late portion of the Cretaceous 

 the species has been recorded from Algeria, Tunis, Tripoli, 

 Egypt {Oxtrea overwegi be Is of the Libyan Desert), Palestine, 

 and Syria §, and a related form from the Cameroons 

 ( = Kamerun). 



(C) An Orhitoidal Limestone from Southern yi(/eria. 



Mr. Parkinson's geological specimens from Southern 

 Nigeria include a j)iece of limestone of yellow-ochreous 

 colour made up entirely of what appears to be one form uf 



* 'Mission M. le Com. lloiulaire Cliotts Tuiiisiens,' 18S1, pis. iv. I't v. 

 pp. 74-77. 



t See II. B. Newton, Trftut). Koyal Soc. South Africa, 1909, vol. i. 

 p. 67. 



I " Die Foss. Moni;olireido Ivainoriin," in Ur. Ernst Escli's ' lieitrivi^e 

 zur Geolopie von Kainernn," liKM, p. L'-U). 



§ Blanckeiiliorn. ' Beitnitre /ur UeoloM-it. Syriens," 18i)0. pp. -24, 25, iV. 



