IN THE ESNA-IDFU REGION, NILE VALLEY, EGYPT 165 



Troelsen (1957 : 127, text-fig. 4) and Berggren (1962 : 18, 84, test-fig. 2) showed 

 that G. daubjergensis appears for the first time at the base of the Danian in its type 

 area, and ranges throughout the whole Danian stage of Scandinavia, becoming 

 particularly abundant in the upper part where it commonly dominates the planktonic 

 fauna. It was also recorded from the Danian rocks of Denmark, Holland and 

 Belgium (Hofker 1956a, 1959a, 1960a, d, g, i, 1961a 1 , 1962a) ; from the basal Paleocene 

 Globorotalia trinidadensis Zone of the lower Lizard Springs formation of Trinidad 

 (Bolli 1957ft) ; from the Danian of Sweden and of the Gulf and Atlantic Coastal plains 

 (Loeblich & Tappan 1957a, b) ; from the basal part of the Hornerstown formation of 

 New Jersey, which is considered of Danian age (Olsson i960) ; from the Globorotalia 

 trinidadensis Zone of the Paderno d'Adda section of northern Italy, which is regarded 

 to be of Lower Danian age (Bolli & Cita 1960a, 6) ; from the basal part of the Velasco 

 formation of Mexico (Lower Danian) (Hay i960) ; from the Paleocene of Cuba, 

 Mexico and Venezuela (Bermudez 1961) ; from the Lower Paleocene of the Gubbio 

 section, Italy (Luterbacher & Premoli Silva 1962) and from the basal Paleocene of 

 Austria (Hillebrandt 1962). 



All reliable references show clearly that G. daubjergensis is an excellent index 

 fossil for the Danian ; that it ranges throughout the whole stage, being most abundant 

 at its top, and that it does not cross the Danian-Middle Paleocene boundary. All 

 records of G. daubjergensis from rocks younger than the uppermost Danian are either 

 erroneous, or of reworked specimens, while all records from rocks older than the basal 

 Danian are actually Rugoglobigerina or Hedbergella species. 



The assignment of the species to the Lower Danian only, as mentioned by Bolli & 

 Cita (1960a, b) and Hay (i960), is apparently due to the fact that the first-mentioned 

 authors had included the lower part of the Middle Paleocene, distinguished by the 

 abundance of G. angulata (White), in their Upper Danian. Hay (i960) recorded 

 G. compressa (Plummer) as ranging throughout the whole Danian, and G. daubjer- 

 gensis as ranging through the lower part only, while all reliable references show 

 that G. daubjergensis ranges throughout the whole Danian, while G. compressa is 

 restricted to the Upper Danian. 



In the Esna-Idfu region, Globigerina daubjergensis floods the Upper Danian part 

 of the sections studied, (the Lower and Middle Danian being missing) and disappears 

 completely before the first appearance of G. angulata angulata (White) of Middle 

 Paleocene age. The apparently similar forms in the Middle Paleocene are actually 

 G. kozlowskii Brotzen & Pozaryska. 



Globigerina haynesi sp. nov. 

 (PI. 15, figs. 5«-e) 



Diagnosis. A Globigerina with relatively raised dorsal side and moderately 

 inflated ventral one ; quadrate, lobate equatorial periphery ; depressed sutures : 

 very narrow umbilicus and delicately papillose surface. 



Description. Test medium-sized, coiled in a relatively high trochospire ; dorsal 

 side subconical, inflated ; ventral side quadriglobular, moderately inflated ; equatorial 



