Land- & Fresh-water Mollusca. 11 



lb (p. 213), 30 (p. 15), 93 (p. 39), 62 (p. 70, pi. 12, f. 20 — 22). 3) Physa wahl- 

 Wtgi Krauss 59 (p. 84, pi. 5, f. 13), 9 (I, p. 180), 72 (p. 100), 75 (p. 214), 30 

 p. 15), 62 (p. 71, pi. 12, f. 23, 24), 93 (p. 39, 42). 4) Bulinus scalaris Dunker 

 I (p. 164), 31a (p. 8, pi. 2, f. 5—6), 9 (I, p. 179), 72 (p. 100), 75 (p. 214), 

 10 (p. 15), 93 (p. 44), 62 (p. 71, pi. 12, f. 27 — 28). 5) Bulinus schmidti Dunker 

 (1 a (p. 9, pi. 2, f. 7—8), 9 (I, p. 179), 72 (p. 100), 75 (p. 213), 30 (p. 15), 93 

 p. 44). 62 (p< 71, pi. 12, f. 25 — 26). 6) Bulinus fischeriana Bourguinat 9 (I, p. 

 46, pi. 11, f. 1 — 3), 74 (p. 214), 93 (p. 40). 7) Physa clavulata Morelet 93 

 p. 93, pi. 9, f. 6), 30 (p. 15). 8) Physa semiplicata Morelet 93 (p. 91), 75 (p. 

 114), 30 (p. 15). 9) Physa turriculata Morelet 93 (p. 91), 75 (p. 213). 10) Physa 

 pirn lata Morelet 93 (p. 90, pi. 8, f. 3). 11) Physa beccarii Paladilhe 100 (p. 

 3, pi. 1, f. 7 — 8). 12) ? Isidora striata Mus. Frankof 54 (p. 199). 13) Physa 

 Urea Parreyss 54 (p. 199). 14) Physa jickclii Krauss 54 (p. 199). 



13. Limicolaria sennaariensis (Parreyss). 



a) Main species. 



Alt. 68,5 mm. Lai. 25,5 mm. Length of the opening 24,5 

 mm., its breadth 24,5 mm. 



Hob. Between Gebelain and Renk (The White Nile). Six 

 dead specimens with the epidermis preserved. Four of the speci- 

 mens have the length of the opening shorter than the breadth 

 of the shell. In the other two the length of the opening is of 

 the same size as its breadth. 



b) var. gracilis v. Martens. 



Alt. 73 mm. Lot. 25,5 mm. Length of the opening 29 mm., 

 its breadth 14,5 mm. 



Hab. Between Gebelain and Renk (The White Nile). Three 

 specimens without the animal. In all of them the length of the 

 opening exceeds the breadth of the shell. The specimens differ 

 in their size from those known before. 



c) var. crassior n. n. 



Alt. 79 mm. Lat. 33 mm. Length of the opening 29,8 mm., 

 its breadth 20 mm. 



Hab. Between Gebelain and Eenk (the White Nile). One 

 specimen without the animal and with the coloured bands blea- 

 ched. The specimen agrees with one described and pictured by 

 Kobelt (58, p. 71, T. 23, f. 4) from Senaar, which he holds 

 to be a variety of sennaariensis, but to which he has not given 

 any name. 



