640 ME. E. B. NEWTON ON [Nov. I9II, 



Occurrence. — The specimen is associated with a cream-coloured 

 limestone containing various forms of foraminifera, including Ortho- 

 phragmina. etc. 



L o c a 1 i t y . — Lamludeh. 



EOSTELLAEIA Sp. (PI. XLVI, fig. 10.) 



Remarks. — Under this genus are included two limestone-casts 

 of fragmentary preservation, both exhibiting parts of the basal and 

 penultimate whorls. These whorls are depressed and divided by a 

 prominent suture, the basal being furnished with a median obtuse 

 angulation from which descends obliquely and conically the 

 remainder of the whorl to the somewhat tapering extremity. The 

 aperture is elongate, more or less of oval shape and nearly perpen- 

 dicular, and at the base of the columella is a deep slit-like cavity 

 from which originally would have extended a possible narrow 

 canaliculation. The specimens are of different sizes, and evidently 

 belonged to fairly large individuals like the Strombus amplus of 

 Solander = Rostellaria macroptera of Lamarck, 1 although the casts 

 give no indication of the extensive labrum which characterizes that 

 species. 



Dimensions in millimetres : — 



Larger specimen. Smaller specimen. 



Length 63 54 



Width (front aspect) 45 37 



It is interesting to note that Dr. Oppenheim 2 refers to some 

 doubtful fragments of a Rostellaria found in the Priabonian clays 

 of Possagno, of the group macroptera, and with resemblances to 

 JR. cf . marceancci of Deshayes, described and figured by Fuchs from 

 beds of similar age in Russia (Kalinovka), although the casts from 

 Cyrenaica show no particular relationship to this last-named form. 



Occurrence. — Specimens are associated with a light- coloured 

 limestone, weathering to a reddish tint, in which NurnmuUtes and 

 other microzoa are observable. 



Localities. — 'After shrine of Sidi Abdullah'; south-east of 



Gisoetia gigantea (Minister in Goldfuss). (PL XLVI, fig. 8.) 



Strombus giganteus Miinster in Goldfuss, ' Petrefacta Germanise ' 1844, vol. iii, 



pi. clxix, fig. 3 & p. 14. 

 Ovula (Strombus) gigantea Lefevre, Aim. Soc. Malacol. Belgique, 1878, vol. xiii, 



pi. iii, figs. 1-3, pi. iv, figs. 1-3, pi. v, fig. 1, pi. vi, fig. 1 & pp. 22-40. 

 Gisortia gigantea Oppenheim, Palaeontographica, 1906, vol. xxx, pt. 3, No. 2, 



p. 304. 



Remarks. — This is a small limestone-cast which may be 

 referred to Miinster's species, originally described from the Kres- 

 senberg (Lutetian) Beds. 



Dimensions. — Length (approx.) = 55 mm.; width = 40 mm. 



The species is characteristic of the Lutetian stage of the Eocene 



1 See G. P. Deshayes, « Descr. Coq. Foss. Paris ' vol. ii (1835) p. 620 & 

 pis. lxxxiii, fig. 1, lxxxiv, fig. 1, lxxxv, fig. 10. 



2 Palaeontographica, vol. xlvii (1901) p. 211. 



