228 Bulletin American Museum of Natural History [Vol. LIII 
Anceya 
3. Last whorl roundly subangular, not keeled; whorls about 18 in a length of 12 mm. 
Subgenus Burtonilla E. A. Smith....... A. terebriformis (E. A. Smith). 
Hasse cnemcled by afiarrany meee so cis ts dete gaeeee See eek aoe cee es A, 
4, With about 11 to 14 whorlsin entire shells 4to12 mm. long. Subgenus Anceya, 
DD DOL ee Thine cas tie Seve cme Oe ach a Sirus Wuseih, Tasdhn vette bate ale cacw ole &* 3. 
With about 64 to 744 whorls in specimens about 3 mm. long. Martelia 
Dautzenberg... nae ES GRE Pe 
5. Columellar fold anit or vextreniels? seeds ana 12 pia on the an ie. 
A. bella Pilsbry and Bequaert. 
Cotume tar colkiwellidevetopeds ai Dots. couine) lk ire b tects Wee ea wl vee ae oe 6. 
Last whorl with a deeply immersed median palatal fold, seen by transparence 
Parone) the shell, or by breaking it back; ribs rather straight. 
A. giraudi Bourguignat. 
ING eltar Ol within toe lash WhOre fo. eek ee ley eee ve be t, 
7. Very slender; about 8 curved ribs on the penult whorl. 
A. admirabilis Bourguignat. 
Stouter shells, with about 11 to 13 ribs on the penult whorl; banded with reddish 
Oleh tile WOU ia si aor aay hak reece eh hel A. rufocincia KE. A. Smith, 
oe 
Martelia 
8. Periphery prominent, but not keeled or spinose; axial ribs rather numerous. 
M. tanganyicensis Dautzenberg. 
Periphery carinate; the axial ribs fewer and somewhat spinose. 
M. dautzenbergi Dupuis. 
Syrnotopsis EH). A. Smith 
Senna te A. Smiru, 1880, Ann. Mag. Nat. Hist., (5) VI, p. 426. Monotype: 
Syrnolopsis lacustris EB. A. Smith. ‘ 
Stormsia “Bourguignat’’ GERMAIN, 1919, Bull. Mus. Hist. Nat. Paris, p. 356. 
As asynonym of Syrnolopsis, with Syrnolopsis carinifera E. A. Smith as type. 
Syrnolopsis lacustris KE. A. Smith - 
Text Figures 26a-g and 27a, b 
Syrnolopsis lacustris E. A. Smiru, 1880, Ann. Mag. Nat. Hist., (5) VI, p. 426; 
1881, Proc. Zool. Soc. London, p. 288, Pl. xxxu1, figs. 21 and 21b. Green, 1881, Journ. 
de Concha. XXIX, p. 119, Pl. IV, fig. 6. Peleencor 1886, Bull. Mus. Bldat: Nat. Belgi- 
que, LV, p. 107. aes 1888, ‘Iconogr. Malacol. Tanganika,’ Pl. x, figs. 14— 
17; 1890, Ann. Sc. Nat. Zool., (7) X, p. 142, Pl. x, figs. 14-17. E. v. MARTENS, 
1897, ‘Deutsch Ost Afr., IV, easchede Weilith ° poet, Pi wa ie 46... A. 
ea 1904, Proce. Molaro. Soc. London, VI, 2, p. 97. Gratin, 1905, Bull. Mus. 
Hist. Nat. Paris, p. 259; 1908, ‘Rés. Beeaat, Voy. Afrique Foa,’ p. 675. ANcry, 
1907, Bull. Scientif. Pratiée et Belgique, (5) IX, (1906), p. 255. 
Fascinella lacustris E. A. Smith. Tasco, 1884, Sitz. Ber. Ak. Wiss. Wien, 
Math. Naturw. KI. , XC, Abt. 1, p. 68; Pl. 1, fig. 10. 
Syrnolopsts wander Bonecuranag: 1885, ‘Notice Prodrom. Moll. Giraud 
Tanganika,’ p. 18; 1888, ‘Ieonogr. Malacol. ey, Pl. x, figs. 22-24; 1890, 
Ann. Se. Nat. Feel (7) X, p. 144, Pl. x, figs. 22-24. Ancry, 1907, Bull.. Paent 
France et Belgique, (5) De (1906), pp. 255 and 266. 
