IN THE ESNA-IDFU REGION, NILE VALLEY, EGYPT 205 



compressa and labelled specimens of G. membranacea from the Lower Foraminiferal 

 beds of the northern Caucasus and has concluded that G. ehrenbergi and G. compressa 

 are distinct species." 



Jennings (1936), Toulmin (1941), Cushman & Todd (1942), Shifiiett (1948), 

 Bronnimann (19526), Hamilton (1953) and Reyment (i960) described as G. compressa, 

 forms which probably belong to Globorotalia emilei sp.nov. Cushman & Bermudez 

 (1949), Subbotina (1953, pars), Olsson (1960), and Hillebrandt (1962) described as 

 G. compressa, forms which are probably Globorotalia pseudobulloides (Plummer). 



Subbotina (1953) had confused G. compressa (Plummer) with both G. pseudo- 

 bulloides (Plummer) and G. ehrenbergi Bolli, while Hofker (1956c, 1958a) described as 

 Globigerina compressa Plummer, forms which are completely different from Plum- 

 mer's original description and figures (see synonymy). 



Hypotypes. P.45601-03. 



Horizon and locality. Figured specimens, pi. 17, figs, la-c, from sample 

 No. 31, Gebel Owaina section ; figs, za-c, from sample No. 30, Gebel Owaina section ; 

 figs. 3<z-c, from sample No. 7, Gebel El-Kilabiya section. 



Stratigraphical range. Globorotalia compressa (Plummer) was first described 

 from the upper Midway group of Texas (the Wills Point Formation), which, according 

 to Loeblich & Tappan (1957a, b) is of Upper Danian age. 



It was also recorded from the Upper Danian at its type locality in Denmark, and 

 in southern Sweden (Bronnimann 1953 ; Reichel 1953 ; Troelsen 1957 ; Loeblich & 

 Tappan 1957a, b ; Hofker 1960^ ; and Berggren 19606, 1962). 



All reliable records show that G. compressa (Plummer) is a very short ranging 

 species, restricted to the Upper Danian. All records of G. compressa from the Mae- 

 strichtian (e.g. Meyer 1959 and Hofker 1958a, etc.), from the Middle or Upper 

 Paleocene, or from the Lower Eocene (e.g. Jennings 1936 ; Toulmin 1941 ; Cushman 

 & Todd 1942 ; Shifiiett 1948 ; Bronnimann 19526 ; Hamilton 1953 ; Bolli 19576, and 

 Reyment i960) are found to be erroneous. Again, the extension of the range of the 

 present species throughout the Danian (e.g. Hay i960) or throughout the Danian 

 and the Lower Montian (e.g. Bolli & Cita 1960a, 6) is incorrect. 



In the Esna-Idfu region, G. compressa (Plummer) occurs as a common to abundant 

 form in the Upper Danian and dies out completely before the first appearance of 

 G. angulata angulata (White) which marks the Danian-Middle Paleocene boundary. 



Globorotalia cf. convexa Subbotina 

 (PI. 22, figs. 3a-c) 



? 1953 Globorotalia convexa Subbotina : 209, pi. 17, figs. 2a-y. 



? 1957a Globorotalia convexa Subbotina ; Loeblich & Tappan : 188-189, pi. 48, figs. $a-c ; 

 pi. 50, figs, ya-c ; pi. 53, figs. 6a-8c ; pi. 57, figs. 5«-6c ; pi. 61, figs, ^a-c ; pi. 63, figs. \a-c. 



Description. Test medium sized, unequally biconvex, coiled in a low trocho- 

 spire ; dorsal side slightly raised ; ventral side strongly inflated ; equatorial periphery 

 subcircular, moderately lobate ; axial periphery rounded ; chambers on the dorsal 



