FROM TANGANYIKA AND KENYA 165 



Ampullospira dejanira (d'Orbigny) 

 PL 28, fig. 8 



1852. Natica Dejanira d'Orbigny : 209, pi. 296, figs. 1, 2. 



i960. Ampullospira eudora (d'Orbigny) ; Joubert, pi. 12, figs. \a, b (non d'Orbigny sp.) 



Material. Several specimens (nos. G.76392-96, G.76398, G.76406-08). 



Localities and horizon. Wilderri hill, n miles S.S.W. of Rahmu, N.E. Kenya ; 

 low hills at Dusse, ij miles S.E. of Rahmu, N.E. Kenya. Upper Oxfordian, Seir 

 Limestones. 



Remarks. The specimens included in this species are characterized by their 

 elevated spire, which occupies from rather more than one-third to about one-half of 

 the total height of the shell, by their highly and evenly convex whorls, and by the 

 considerable breadth of the last whorl, the maximum diameter of which much ex- 

 ceeds the height of the aperture and is approximately equal to the total height of the 

 last whorl. An umbilicus appears to be absent. The largest specimen, when com- 

 plete, was about 55 mm. high and the diameter of its last whorl was about 44 mm. 

 When first recorded, these specimens were referred to the species Ampullospira 

 eudora (d'Orbigny) (1852 : 211, pi. 297, figs. 1-3), which has an equally elevated 

 spire, but they differ from that species in their relatively broader and more strongly 

 convex last whorl, and agree more closely with d'Orbigny 's figures of A. dejanira, a 

 species which he records from a number of French Upper Oxfordian localities. 



Ampullospira quennelli sp. nov. 

 PL 29, figs. 2a, b, c, 3a, b, c 



Specific name. After Mr. A. M. Quennell, formerly Director of the Tanganyika 

 Geological Survey, collector of the holotype. 



Diagnosis. Shell of medium size for the genus (height of holotype 34 mm.), 

 globose, height exceeding diameter. Spire slightly obtuse, its height rather less than 

 one-third of that of shell ; spire whorls with moderately convex outer face, separated 

 by a sharp angulation from a flat or slightly concave sutural ledge which is of moder- 

 ate width on last whorl. Last whorl broadly convex at periphery and with an evenly 

 convex basal outline. Umbilicus apparently absent. Growth-lines slightly prosocline. 

 Breadth of aperture about two-thirds of its height. Details of inner lip uncertain 

 (owing to obscuring matrix). 



Holotype and paratypes. Nos. G. 91998, GG. 10324-26 respectively. There 

 are, in addition, several internal moulds, mostly deformed by pressure, which 

 probably belong to this species. 



Localities and horizons. Nchia stream, 2 miles W.N.W. of Mandawa, Tangan- 

 yika ; Lonji stream, E.N.E. of Nandenga, Tanganyika ; both Callovian. Im- 

 perfect specimens from about the same horizon and probably referable to this species 

 are from the Lonji stream, E.N.E. of Mandenga, from the Lihimaliao stream, at a 

 point I mile E. of Njenga, and from the Mbaru stream, at a point 1 mile N.W. of 



