Geological Society. 211 



as one of exceptional interest, which the speaker had so far not 

 been able to investigate. 



The depression between the Mathews and associated ranges and 

 the Abyssinian frontier on which the Marsabit and Hurri volcanoes 

 were situated, and the origin of the Kiiroli Desert (Elgess), were 

 the outstanding featui'es of the district that required further 

 elucidation. 



Mr. Gr. C. Crick stated that the Cephalopoda submitted to him 

 by the Lectm-er consisted chiefly of crushed ammonites from dark- 

 grey shales at Kukatta on the Juba River (lat. 2° 8' N.), there 

 being also a belemnite preserved in a yellowish-brown rock-fi-agment 

 from Serenli on the same river and somewhat north of Kukatta. 

 He regarded all the ammonites as referable to Perisjihinctes and 

 its section Virgatosphinctes, and to species which had previously 

 been described from the neighbourhood of Mombasa. From tliis 

 assemblage of forms he concluded that the shales at Kukatta were 

 of Upper Oxfordian (Sequanian) age. He stated that the belemnite 

 from Serenli indicated the presence there of a slender sulcate form, 

 similar to those previously recorded from British Somaliland on the 

 north and from the neighboTu-hogd of Mombasa on the south ; but, 

 although of Jurassic age, it was too imperfectly shown in the 

 rock-fmgment for accm'ate determination. 



Mr. R. BuLLEK Newtois" said that he had examined a small 

 series of non-marine Kainozoic molluscan remains belonging to 

 recent species, and associated with hard and soft limestones, 

 calcareous sandstones, and conglomerates, which had been collected 

 by the Lecturer, and had determined them as follows : — 



Amptjllaeia ovata (?) OKvier. Locality.— Lak Buna. 

 Distribution. — Recent: Victoria Nyanza, Tanganyika, Nile; 

 Post-Pliocene: Egypt; Miocene: Victoria Nyanza. 



Melania tubeeculata (Miiller) (= curvicosfa Deshayes). 

 Localities. — ^Archer's Post ; Lak Buna ; Chikali Khofu, 



Distribution. — Recent: Nile, Rudolf, Nyasa, Tanganyika, 

 India, etc.; Post-Pliocene: Egypt and Sahara; Pliocene: 

 Lake Assal, French Somaliland (formerly regarded as Abyssinia) ; 

 Miocene : Rudolf (Omo River), Greece, North Italy, etc. 



Cleopatea bulimoides (Olivier). Localities. — Lak Buna; 

 Chikali Khofu. 



Distribution. — Recent: Nile, Rudolf, French SomalUand, 

 Zanzibar; Post-Pliocene: Egypt; Pliocene: French Somali- 

 land; Miocene: Victoria Nyanza. 



BYTHi^nA and PlajSTOEBIS spp. Locality. — Waihir. 



