1927] _ Prlsbry-Bequaert; The Aquatic Mollusks of the Belgian Congo 137 
Bulinus parietalis (Mousson)=Physa parietalis Movsson, 1887, Journ. de 
Conchyl., XX XV, p. 298, Pl. xu, figs. 8-8a. Ondonga, Su ubhoweshern Arion. 
Bulinus Fae ys (Prsdhowi Phigss permembranacea PRESTON, 1912, 
Rev. Zool. Afric., I, 3, p. 327, Pl. xv, fig. 8. Aberdare Range, Kenya Colony. 
Bulinus randabelt bicuieion. See p. 189... 
Bulinus rohlfst (Clessin) = Physa rohlfsi Cumssin, 1886, in Martini and Chem- 
nitz, ‘Syst. Conch. Cab. , 1, 17, Limneeiden,’ p. 349, Pl. xurx Re: 7. Kuka, Lake Chad. 
Bulinus eet ats scion) Physa rumrutiensis Preston, 1913, Rev. Zool. 
Afric., III, 1, p.57. Between Rumruti and Mt. Kenya, Kenya Colony. 
Bulinus schackoi (Jickeli) =Isidora schackoi JickEi, 1874, Nova Acta Ac. Nat. 
Cur. Dresden, XXXVII, 1, p. 197, Pl. vu, fig. 12. Toquor River at Mekerka, 
Abyssinia. 
Bulinus schackot mut. minimus (Pollonera)=Isidora schackoi mut. minima 
PoLLoNERA, 1898, Boll. Mus. Zool. Anat. Comp. Torino, XIII, No. 313, p. 12. Adi- 
Cani near Sneatusny Eritrea. 
Bulinus senegalensis O. F. Miller. See p. 138. 
Bulinus sericinus (Jickeli) =Isidora sericina JicKELI, 1874, Nova Acta Ac. Nat. 
Cur. Dresden, XX XVII, 1, p. 194, Pl. 111, fig. 2 and Pl. vu, fig. 11. Province of Hama- 
sen, near Melero on the T oquor River, Abyssinia. 
Pollonera (1898, Boll. Mus. Zool. Anat. Comp. Torino, XIII, No. 318, p. 11, 
Pl., figs. 26-27) has described a doubtful variety harpula of this species, from pate 
Asians and Debaroa, Eritrea. 
Bulinus strigosus: (EK. v. Martens) =TJ/sidora strigosa E. v. MARTENS, 1897, 
‘Deutsch Ost Afr.. IV, Reschalte Weichth.,’ p. 139, Pl. v1, fig. 11. Lake cae 
near Bukoba. J. Thiele (1911, ‘Wiss. lrgebu. D. Z. Afr. Exp. (1907-08),’ ITI, 
209) records this species from Lakes Mohasi and Bolero in Ruanda (Setbatots 
Coll.). 
Bulinus succinoides (E. A. Smith) = Physa succinoides E. A. Smarr, 1877, Proc. 
Zool. Soc. London, p. 718, Pl. uxxv, figs. 19-20. Lake Nyasa. 
— - Bulinus syngenes (Preston) = Physa syngenes PRESTON, 1913, Rev. Zool. Afric., 
III, 1, p. 56, Pl. v, fig. 10. Lake Naivasha, Kenya Colony. 
Boulinae ichadiensis (Germain)=Physa (Isidora) tchadiensis GERMAIN, 1905, 
Bull. Mus. Hist. Nat. Paris, p. 485; 1906, Mém. Soc. Zool. France, XIX, p. 225, PI. 
Iv, figs. 5-6. Lake Chad. Germain (1905, op. cit., pp. 485-486) has named of this 
species the following varieties, all from Lake Chad: albida, brevispirata, castanea, dis- 
juncta, elata, regularis, translucida, and ventricosa. Of these, the var. regularis has 
been figured in 1906, Mém. Soc. Zool. France, XIX, p. 226, Pl. 1v, figs. 3-4, and 1908, 
in A. Chevalier, ‘L’ Afrique Centrale Francaise,’ p. 498, Pl. v, fig. 6. 
Bulinus transversalis (E. v. Martens) =Isidora irdaenenaeine Dae Martens, 
1897, ‘Deutsch Ost Afr., IV, Beschalte Weichth.,’ p. 139, Pl. v1, fig. 9. Ndukali in 
Bumbide Island, Lake Victoria. 
Bulinus trigonus (EK. v. Martens) =Physa trigona I. v. Marrens, 1892, Sitz. 
Ber. Ges. Naturf. Fr. Berlin, p. 17. Isidora trigona BE. v. Martens, 1897, ‘Deutsch 
Ost Afr., IV, Beschalte Weichth.,’ p. 138, Pl. v1, fig. 8. Near Bukome, Lake Victoria, 
J. Thiele (1911, ‘Wiss. Ergebn. D. Z. Afr. Exp. (1907-08),’ III, p. 209) records this 
species from Lake Mohasi in Ruanda (Schubotz Coll ). 
- Bulinus trigonus var. altus (Germain) =Physa trigona var. alia GERMAIN,, 
1908, in A. Chevalier, ‘L’ Afrique Centrale Francaise,’ p. 495. Lake Chad. 
