1864.] COLLECTED BY CAPT. SPEKE. 117 
6. ACHATINA SPEKEI, Dohrn, n. sp. 
Lesta oblonga, solidula, superne obsoletissime granulata, sub epi- 
dermide cornea albida, irregulariter fulvo strigata; spira 
conica, apice obtusula, sutura submarginata; anfr. 6-7, con- 
vexiusculi, ultimus 2 longitudinis equans ; columella oblique 
truncata, areuata, callo tenui induta ; apertura oblongo-ovata. 
Hab. Ad lacum Victoria N’yanza. 
Acceditad Achatinam ustulatam Lamarckii, a qua precipue spira 
graciliore, apice tenuiore, anfractibus superioribus convexioribus, 
columella magis arcuata differt. 
7. CycLosToMA CALCARIUM, Sow. Locality doubtful. 
~8. Lima, sp., and 
«9. PLanorsts, sp. From the Victoria N’yanza and the White 
Nile, as far down as 4° of N. latitude. 
10. Puysopsis AFRICANA, Krauss. Mixed up with Nilotic shells; 
but I suspect it is probable that this South-African species has been 
found in the Kingani River. 
11. LANISTES PURPUREUS, Jonas, and 
12. LanisTEs ovum, Peters. Probably from the Kingani River. 
) 13. Lantsres BOLTENIANUS, Chemn. From the Nile and the 
- Victoria N’yanza. The specimens are larger than those previously 
found further down the river. 
14, AmpuLuArRia speciosa, Phil. From the Kingani River. 
15. NavicELLA PORCELLANA, Linn. From Johanna Island, 
Zanzibar. 
v 16. PALUDINA UNICOLOR, Oliv., and 
v17. Patupina BuLIMoIDES, Oliv. From the Victoria N’yanza 
and the White Nile. Of the latter species there is a gigantic speci- 
men from the lake, more than twice as long as usual. 
18. Mexania TUBERCULATA, Mill., and. 
19. CorsicuLta FLuMiNALIS, Mill. Both probably from the 
Nilotic district. 
20. Unto cartuaAupl, Fér., and 
21. Unto xeyrrt1acus, Caill. Are known as Nilotic species. 
22. Unio MossAMBICENSIS, Peters. Has been described from 
the Zambezi, where it lives together with the following species. 
23. SpaTHA PETERSI, Martens. 
24, SparHa WAHLBERGI, Krauss. Known from the Limpopo 
River in Caffraria. 
