240 MRS. JANE L0isC4STArF OX KUN-MARINE 



600 metres. My speoimen is largei- but has much the same proportions; 

 it measures, alt. 82, cliam. 70 ; aperture, alt. 56, diam. 37 mm. It has only 

 three whorls preserved, the apex being broken. 



This species is common in all the lakes and rivers of Egypt as well as 

 throughout the whole Nile basin ; it also occurs in Abyssinia. It has thus a 

 more extended rang-e northwards than A. icernei. 



Ampullaeia weenei, Fhil. 



Amjmllcn-ia wernei, Philippi, 1851, ' Conchyl.-Cab.' ed. 2: Genus Ampullaria, p. 19, 

 pi. o. fig. 4, and pi. 17. fig. 2. 



About fifty specimens w( re taken. The species occurred throughout the 

 course of the White Nile traversed, namely at Abba Island, both opposite 

 Fashi Shoya and also at Tawila, Kosti, Hillet Abbfis, Grebel En, south of 

 Melut, Lul, Waw, Taufikiya, Duleb (Sobat River), Bahr el-Zarafa, Lake 

 Shambe, Kanisa, and Rejaf Wooding Station. I am uncertain whether to 

 refer a number of immature shells found at Malek to this species or to 

 A. I'ordofana. 



A laroe individual from Hillet Abbas consistino- of six whorls measures, 

 alt. 103, diam. 97; aperture, alt. 77, diam. 45 mm. It was alive, as well as 

 another nearly as big. Shells from Tawila almost equal these in dimensions, 

 and the operculum belonging to a still larger shell was found at Gebel En. 



A. icernei has been reported from near Kassalato the north and throughout 

 the basin of the Upper Nile southward to the Great Lakes, as well as west- 

 ward in the Bahr el-Ghazal and Chari River. Von Martens mentions a 

 variety which was collected by Prof. Peters in Querimba Island. 



LxVNISTES CAEINATUS, OUi\ 



Cyclustoma carinata, Olivier, 1804, 1812, ' Voy. Emp. Ottoman,' vol. ii. p. 39, vol. iii. 

 p. 68, Atlas ii. pi. 31. fig. 2. 



This species was found at intervals throughout nearly the whole distance 

 traversed, namely at Ad-Duwem, Abba Island, Kosti, Hillet Abbas, Masran 

 Island, Gebel En, Renk Wood Station, Mashra Zartifa Wood Station, Kaka, 

 S. of Melut, Kodok, Lul, near each end of the Bahr el-Zarafa, Lake Shambe, 

 Kanisa, Malek, and Sheik Tombe. Of the sixty specimens taken, many were 

 living ; the largest, however, which is from Kaka, was dead and devoid of 

 epidermis. 



Lanistes carhiatiis occurs both in Lower and Upper Egypt ; in the Sudan 

 being reported from Sennaar on the Blue Nile, and the Bahr el-Ghazal as 

 well as its tributary the Djur, and, as noted above, in the White Nile up to 

 the borders of Uganda, in the Victoria Nyanza, Lake Lembea, and as far 

 east as the Tana River. It also is found fossil in Recent and Post-Pliocene 

 deposits in Egypt, and in Miocene beds near the Victoria Nyanza. 



