396 R. B. Neicton — Fossils from Nubian Sandstone, Egypt. 



but when carefully examined such, resemblance is not maintained, nor 

 do they compare with any closeness to similar shells found in the later 

 deposits of the Cretaceous Series. Russegger regarded his Cyclas faha ? 

 as indicating Greensand, Quadersandstein, or Wealden, but as the 

 specimen was never figured or described, its scientific value at the 

 present day is unimportant. It may be mentioned, however, that 

 none of the unioniform shells now described could possibly be mistaken 

 for the genus Cyclas. 



The fact that a marine organism accompanies the shells appears to 

 be ample testimonj^ of the estuarine conditions which prevailed during 

 the deposition of the beds, as doubtless the valves, probably in the 

 dead state, were brought along by river action to the neighbourhood 

 of the sea, and so became associated with marine life. 



So far as the Annelid tubes are concerned, their determination as 

 Galeolaria filiformis appears to be correct, and although this is 

 a species which ranges throughout the Cretaceous system, it is 

 satisfactory to learn of its occurrence in the Arialyur Group 

 ( = Senonian) of India, and in the rocks of the Baharia Oasis of the 

 Libyan Desert of Egypt accompanying Cenomanian mollusca {Exogyra 

 Olis iponens is, etc . ) . 



The Inoceramus, as pointed out, belongs to a groap of forms which 

 are restricted to Upper Cretaceous rocks, and mostly to the Campanian 

 stage of the Senonian period. Paul Choffat ' records /. Cripsi, var. 

 typica, of Zittel as having been found in a sandstone outlier at Mira 

 in Portugal associated with Hoplites Van, var. Marroti, of Coquand, 

 and determined as of Campanian age. Fournel's* Cripsi (= regularis, 

 Orbigny) is found in the Senonian of Algeria. 



According to Madagascar^ lists Cripsi (Goldfuss) occurs in that 

 country, and is regarded as Senonian. Both Stoliczka * and Kossmat ° 

 recognize the same form in the Upper Senonian of Southern India, 

 as also does Professor Yokoyama ^ in the Senonian of Japan. Further, 

 Whiteaves' has recognized it in the Senonian of Vancouver, whilst 

 under the names of Sagensis of Owen and Barahini of Morton, 

 Whitfield^ has identified it among the fossils of the Raritan Clays, etc., 

 of New Jersey, United States. 



When it is considered that the typical form of Inoceramus of 

 Turonian times is the labiatus of Schlotheim, and that the true 

 Cripsi of Mantell belongs to the Cenomanian, there seems little 

 doubt that the new species now described, with a facies peculiarly 

 Senonian, might accurately be relegated to that period and possibly to 

 its Campanian stage. 



Although a distance of some 25 miles separates the localities from 



' Eecueil de Monographies Stratigraphiques systeme Cretacique du Portugal, 

 pt. ii, Le Cretacique Superieur au Nord du Tage, 1900, p. 228. 



' Eichesse Minerale de I'Algerie, 1849, vol. i, p. 370, pi. xviii, tigs. 31, 32. 



•^ Lemoine, E'tudes Geologigties dans le Nord de Madagascar, 1906, pp. 222, 230. 



* Mem. Geol. Surv. India, Pal. Indica, 1871, p. 405, pi. xxvii, tig. 3. 

 ^ Eecords Geol. Surv. India, 1897, vol. xxx, p. 82 (correlation table). 



* PaliBontographica, 1890, vol. xxxvi, p. 175, pi. xviii, flgs. 6, 7. 

 ■^ Geol. Surv. Canada, 1879, pp. 170-3. 



» Mon. United States Geol. Surv., 1885, vol. ix, pp. 75-9, pi. xiv, figs. 15, 16, 

 and pi. XV, figs. 3-5. 



