Victoria Nyanza or Lake Oukir6w6. 125 



aliisque spiralibus tenuibua confertis decnssatis sculpti, ultimua 

 in medio angulatus, autico baud descendeus ; upertura ovato- 

 auriformis, longit. totius | ada^quaiis : peristoma temie, vix con- 

 tinuum, marginibus callo tenuissimo nitente juuctis, eolumellari 

 leviter incrassato, subreflexo. 

 Longit. 14 millim,, diam. 9| ; apertura 7 longa, 5^ lata. 



This species is remarkable for its small size, the dull, 

 spirally and obliquely striated surface, and the peripheral 

 angulation of the body-whorl. It was obtained at the Vic- 

 toria Nyanza by Bishop Hannington. 



This is not the young of V. victorioe^ but evidently a speciea 

 which does not attain larger dimensions than those given 

 above. It is distinguished from that species not only by its 

 size but by the more distinct spiral sculpture, the more 

 shouldered whorls, the deeper suture, and the absence of an 

 umbilicus. 



10, Vivi'parus cepoides. (PI. XII. fig. 4.) 



Testa anguste umbilicata, ovata, turrita, tenuis, epidermide viride 

 induta, strigis obliquis saturate olivaceis zonisque vel lineis paucis 

 obsoletis picta, parum nitida, interdum limo rufo obtecta ; an- 

 fractus 0, convexi, superne humerosi, incrementi lineis obliquis 

 striisque spiralibus plus minus obsoletis sculpti, sutura profunda 

 sejuneti ; ultimus rotundatus, ad peripheriam baud angulatus ; 

 apertura magna, ovato-rotundata, intus cteruleo-alba, longit. 

 totius 2 adicquaus ; peristoma tenue, marginibus callo tonui 

 junctis, eolumellari leviter incrassato, sed vix reflcxo. 



Longit. 33 millim., diam. maj. 22| ; apertura 17| longa, 13| lata. 



Ilah. Either the Victoria Nyanza or from the Nile between 

 3° and 14° N. lat. {Oapt. Speke). 



This species is com]jaratively thin and is remarkable for tlie 

 shouklering of the whorls, the deep suture, the green-striped 

 epidermis, and the large aperture. The spiral stride, although 

 not strong, are quite apparent, being more conspicuous 

 around tlie umbilicus than elsewhere. 



All the four specimens collected by Capt. Speke were more 

 or less coated with a rust-like deposit. They vary very 

 little, excepting the spire may be somewhat longer in some 

 specimens than others. 



11. Cleopatra Guillemei, Bourguignat. 

 (PI. XII. fig. 5.) 



Cleopatra Guillemei, Bourguignat, Esp. nouv. et gen. nouv. Ouk(5rdw^ 

 et Tanganika, p. 6. 



Like C. huUmoides (Olivier), but readily distinguished by 

 the grooves around the umbilicus. 



