B. Bullen Newton — Miocene Shells from Egypt. 203 



Camp 22 (58a). Coll. Geol. Surv. Egypt, No. 816, Box No. Ic; 

 No. 326, Box No. 58a. 



Gbnus DELPHINULA, Lamarck. 

 Annales Museum Paris, vol. iv (1804), p. 108. 



Type. — Turbo delphinus, Linnaeus. 



(?) DELPHINULA, sp. 



Eemarks. — The two specimens referred doubtfully to this genus 

 have very convex whorls and a slit-like perforation at the base 

 of the columella ; the aperture is large, oval, and acuminate 

 anteriorly ; no sculpture can be traced, and no further identification 

 of the specimens is possible. 



Dimensions. — Height, (about) 50 mm. ; diameter, 45 mm. 



Horizon. — Miocene (Helvetian). 



Distribution. — Egypt : between Camps 19 and 22. Coll. Geol. 

 Surv. Egypt, No. 817, Box No. 46c. 



Genus CANCELLARIA, Lamarck. 

 Mem. Soc. Hist. Nat. Paris, 1799, p. 7L 



Type. — Vohita reticulata, Linnaeus. 



CANCELLAEIA, sp. (PL VIII, Figs. 4, 5.) 



Eemarks. — Two limestone casts appear to belong to this 

 genus. They have convex whorls, an elongate turreted spire, 

 a subcanaliculation at the base, and an oval aperture pointed 

 anteriorly. In this last character and their form generally they 

 are doubtless related to C. acutangula of Faujas-de-Saint-Fond, 

 a species common to the Miocene beds of Bordeaux, N. Italy, 

 Corsica, etc. 



Dimensions. — Length, 34 mm. ; diameter, 22 mm. 



Horizon. — Miocene (Helvetian). 



Distribution. — Egypt : between Camps 19 and 22. Coll. Geol. 

 Surv. Egypt, No. 833, Box No. 3^ c. 



MOLLUSCA: LAMELLIBRANCHIATA. 



Genus OSTREA, Linnseus. 

 Systema Naturse, lOth ed. (1758), p. 696. 

 Type. — 0. edulis, Linnseus. 



OSTREA DIGITATA, Eichw., var. ROHLFSI, Fuchs. 

 Ostrea digitata, Eichiwald : Natur. Skizze Lithauen Volhynien und Podolien, 1830, 



p. 213. 

 Ostrea digitalina, Du Bois de Montpereux : Conchiologie Foss. Wolhyni-Podolien, 



1831, p. 74, pi. viii, figs. 13, 14. 

 Ostraeit, Rohlfs : Von Tripolis nach Alexandrien, vol. ii (1871), pi. iv, fig. 1 (no text). 

 Ostrea Rohlfsi, T. Fuchs : Denk. Akad. Wiss. (Wien), vol. xli (1879), p. 106, pi. vi, 



figs. 0-8. 

 Ostrea digitalina, var. Rohlfsi, T. Fuchs : Palseontographica, vol. xxx (1883), 



pp. 44 (26), 55 (37), 61 (43) ; pi. xii (vii), figs. 3-6 ; pi. xxii (xvii), figs. 1-3. 

 ? Ostrea digitalina, Mayer-Eymar : ibid., p. 74 (8). 



Remarks. — Although belonging to the group of oysters charac- 

 terized by 0. digitata of Eichwald (misspelt 0. digitalina b}' most 

 authors), this form exhibits some differences, especially in sculpture, 

 which require the adoption of the composite determination introduced 

 by Fuchs, as 0. digitata, var. Rohlfsi. Probably a new name would 

 have been preferable for the Egyptian shell, for, while agreeing with 



