192 ME. E. B. XEWTOtf ON NON-MAEINE MOLLTJSCA^ [June I914, 



also, to E. von Martens, the species does not occur in either Lakes 

 Tanganyika, Albert Edward, or Nyasa, nor has it been recorded 

 from Lake Rudolf ; the southernmost locality for the shell appears 

 to be the Tana River in British East Africa, 1 distant probably 

 some 600 miles east of the deposits whence Dr. Oswald collected 

 his fossils. 



Occurrence. — The specimens found in Beds 14 & 15, which are 

 the most numerous, were associated with Chelonian and Crocodilian 

 remains ; the specimens from Bed 32 occurred with Ampullaria 

 and Cleopatra. 



Localities. — South Nira (Beds 14 & 15) ; Kachuku (Beds 14 

 & 21) ; Nira (Beds 14 & 32). 



Family Yivipaeid^:. 

 Cleopatea bulimoides (Olivier). (PL XXX, figs. 10 & 11.) 



Cyclostoma bulimoides Olivier, ' Voy. Emp. Othoman, Egypte, Perse' 1804 (An 12) 



vol. iii, p. 68 & pi. xxxi, fig. 6. 

 Paludina (Cleopatra) hulimoides Troschel, ' Das Gebiss der Schnecken ' 1857,. 



vol. i, pt. 2, p. 100 {Cleopatra, founded on the structure of the radula, Olivier's 



bulimoides being the type) ; E. von Martens, 'Conchylien aus Zanzibar, &c.' 



Nachtr. Deutsch. Malak. Gesellsch. 1869, p. 154. 

 Cleopatra bulimoides Jickeli, Nova Acta Acad. Cses. Leop.-Car. vol. xxxvii (1874) 



p. 240. 

 Original diagnosis: — Parvulum,fusiformi-oblongum, corneum; zonafitsca y 

 umbilico angusto, apertura ovali. 



Remarks. — Upwards of a hundred specimens in various states of 

 preservation represent this small species. They are of conical oblong 

 contour, possessing about six convex whorls, a slightly oblique, 

 small, and oval aperture, as well as a rather insignificant rimate 

 perforation. The surface is marked by a series of irregular longi- 

 tudinal striations, sometimes sinuated near the suture, the earliest 

 or apical whorls being more or less angulate immediately below 

 the suture and, moreover, furnished with strong spiral costse. It 

 often happens in recent examples that decortication of the apex has 

 taken place, and thus destroyed this early spiral sculpture ; it can 

 be obscurely seen, however, in a British Museum specimen (among 

 others in the same box) collected by Capt. S. S. Flower, at Giza, 

 Egypt, but in the fossil examples this ornamentation is far better 

 preserved. There appear to be no figures illustrating such sculpture, 

 although it constitutes an important feature in the history of the 

 species. References have been made to the unicarinated condition of 

 the uppermost whorls both by Jickeli and by E. von Martens ; but, 

 so far as the presence of spiral costse is concerned, such a character 

 would appear to have hitherto escaped the notice of conchologists. 



Dimensions in millimetres : — 



Complete specimen Imperfect specimen of larger size 



(medium size). (three last ivhorls only). 



Height 13 15 



Diameter ... 7 8 



1 E. von Martens, Monatsber. K. Preuss. Akad. Wissensch. 1878, p. 296. 



