310 Bulletin American Museum of Natural History [Vol. LIII 
Baizea leucoraphe Ancey. E. A. Smiru, 1904, Proc. Malacol. Soc. London, VI, 
2; Dido. 
Baizea (Ponsonbya) leucoraphe ANcEY, 1907, Bull. Scientif. France et Belgique, 
(5) LX, (1906); pe 255: 
Lake Tanganyika: originally described from the lake without more definite 
locality (EK. C. Hore Coll.). 
Fig. 61. Bazzea leucoraphe (Ancey). . Length 4.8 mm. 
Subgenus Covunsoisia Bourguignat 
Coulboisia BourGuIGNAT, 1888, ‘Iconogr. Malacol. Tanganika,’ pp. 39 and 40 
For two species: Coulboisia giraudt Bourguignat and C. smithiana Bourguignat. Type 
by designation of 8. B. Baker (1923): Stanleya| =Coulboisia] giraudi Bourguignat. 
?Stanleya BourcuienatT, 1888, ‘Iconogr. Malacol. Tanganika,’ pp. 39 and 40 
(not of Bourguignat, 1885). Monotype: Stanleya neritoides Bourguignat = Stanleya 
rotundata EK. A. Smith. 
Stanleya Bourguignat. HE. A. Smirx, 1904, Proc. Malacol. Soc. London, VI, 2, 
p. 93. 
Baizea (Coulboisia) giraudt (Bourguignat)! 
Stanleya giraudi BourauieNnat, 1885, ‘ Notice Prodrom. Moll. Giraud Tanganika,’ 
p. 88. EH. A. Samira, 1904, Proc. Malacol. Soc. London, VI, 2, p. 94. 
Stanleya (Coulboisia) giraudi Bourguignat. ANncry, 1907, Bull. Scientif. France 
et Belgique, (5) IX, (1906), p. 254. 
Coulboisia giraudt BourGuIGNAT, 1888, ‘Iconogr. Malacol. Tanganika,’ Pl. xvut, 
figs. 16-17; 1890, Ann. Se. Nat. Zool., (7) X, p. 247, Pl. xvun, figs: 16-17. S. B. 
Baker, 1923, Proc. Ac. Nat. Sc. Philadelphia, LX XV, p. 174. 
Lake Tanganyika: Mlilo (type locality; Giraud Coll.). 
Baizea? (Coulboisia?) rotundata (E. A. Smith) 
Stanleya neritordes BourGuiGNat, 1888, ‘Iconogr. Malacol. Tanganika,’ Pl. XVII, 
figs. 13-15; 1890, Ann. Sc. Nat. Zool., (7) X, p. 246, Pl. xvu, figs. 138-15. ANCEY, 
1907, Bull. Scientif. France et Belgique, (5) IX, (1906), p. 254. S. B. BakER, 1928, 
Proc. Ac. Nat. Sc. Philadelphia, LXXV, p. 174. 
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__iLf Coulboisia is a subordinate group of Baizea, as we believe, the name of this form will have to be 
changed, at least in case it proves to be a valid species or subspecies. 
