XV1 
Errata 
ae 99, line 14 from top, for Ellobide read Ellobiude. 
100, line 15 from bottom, for massensis read massaensis. 
106, line 28 from bottom, for hermaphoditic read hermaphroditic. 
109, line 7 from bottom, for 112 read 111. 
113, last line, for 1980 read 1890. 
114, line 13 from top, for Tanganika read Tanganyika. 
122, line 14 from top, for Ufina read Ufipa. 
122, last line, for V read VI. 
129, line 4 from top, for Planrobis read Planorbis. 
136, line 8 from top for Sturany read Ancey. 
140, line 13 from bottom, for 142 read 141. 
143, line 20 from top, for lla—c read 1, la-c. 
143, line 22 from top, for cecur read occur. 
148, line 3 from bottom, for Ancyclide read Ancylidz. 
149, line 18 from top, after basal insert plate. 
150, line 13 from top, for Eleswhere read Elsewhere. 
150, line 9 from bottom, for farguhari read farquharv. 
159, line 16 from bottom, for 1812 read 1912. 
165, last line, for vir read XVIII. 
166, line 16 from top, for Ethiopion read Ethiopian. 
166, line 17 from top, should start: Hydrocena noticola Benson, 1856. 
170, line 21 from top, delete =Neriita urceus O. F. Miller. 
173, line 6 from top, for Intenational read International. 
173 last two lines, delete the sentence beginning with See. 
176 last line, for renulate read crenulate. 
183 first line, for Ampullarius read Pomacea. 
183 line 9 from bottom, for lybicus read lubycus. 
186 line 22 from top, for Ampullaria read Cyclostoma. 
194 line 2 from bottom, insert 1908 before in. 
197 line 14 from top, for Celadomus read Meladomus. 
201, line 2 from bottom, for callin read calling. 
207, line 5 from bottom, for Alli read Alhi. 
209, line 2 from bottom, for 1095 read 1905. 
210, line 17 from bottom, for Bourguiguat read Bourguignat. 
214, line 16 from top, for P. read B. 
225, transfer the word Type from line 16 (from top) to end of line 14. 
231, in caption of Fig. 28, for a—-b read a-f. 
244, line 15 from bottom, for maisuiq read mais qui. 
245, line 5 from top, for itons read tions. 
264, line 18 from top, for 1900 read 1908. 
288, at end of line 19 from top, add I. 
306, line 5 from top, for Kampampa read Kapampa. 
306, line 8 from top, for Mapala read Mpala. 
313, line 7 from top, for MasriLt& read MABILLE. 
313, line 19 from bottom, for Mkulungula read Mkulungulu: 
313, line 9 from bottom, for foas read foai. 
315, line 11 from top, for 62 read 63. 
315, line 7 from bottom, for 35 read 15. 
