Reference List of South African Non-marine Mollusca. 211 
1863 Achatina octona, Chem., Pfr., Conch. Cab. p. 342. pl. 37 (1865), 
Pt 6204 DF. 
1868 a FA »  Morel., Voy. Welwitsch, Moll. p. 80. 
pliG. to. NL. 
1897 Subulina octona, Chem., von Mts., D.-O.-Afr. p. 123. N. 
1906 . Brug., Pilsb., Man. of Conch. xviii. pp. 73, 222. 
pl.12,f.8, 9, 11, 12. pl. 39, f.28-37, 39,40. DF. 
1907 Opeas octona, Chem., Dixey & Longstaff, Trans. Entom. Soe. 
pascal) U, 
Type—uwbi ? 
Hab. Ruopesia. Rain Forest, Victoria Falls (Dixey & Long- 
staff). 
An American species, introduced into nearly every part of the 
globe. Pilsbry’s synonymy is chiefly followed above. 
426, SUBULINA VITREA, Mousson. 
1887 Stenogyra (Subulina) vitrea, Mouss., J. de C. xxxv. p. 296. 
pled be Due 
1892 e chapman, M. & P., A.M.N.H. ix. p. 90. pl. 6, £.3. DF. 
1906 Subulina vitrea, Mouss., Pilsb., Man. of Conch. xvii. p. 94. 
pled. 00, DE, 
- " chapman, M. & P., Pilsb., ibid. p. 92. pl. 14, f. 46. DF’. 
1910 <I vitrea, Mouss. (=chapman, M. & P.), Bttg., Abh. 
Senckenb. Naturf. Ges. Frankfurt, xxxii. p. 148. N. 
Type of chapmani in British Museum ; vitrea in Zurich Museum. 
Hab. OVAMPOLAND (chapmani, Chapman). Ku-Ganab, south- 
east of Ondonga (vitrea, Schinz). 
Judging from the figures and descriptions, Bottger seems to have 
good reason for uniting the above-mentioned species, which came 
from the same district. 
Genus OPEAS, Albers, 1850. 
(Die Helic. p. 175.) 
Type of Genus, O. subula, Pfr. (gracile, Hutt.). 
427. OPEAS CRAWFORD! (Mely. & Pons.). 
1893 Stenogyra crawfordi, M. & P., A.M.N.H. xii. p. 105. pl.3,f.4. DF. 
1906 Opeas crawfordi, M. & P., Pilsb., Man. of Conch. xviii. p. 149. 
pls Lo, fot Dae 
1910 . " Conn., A.M.N.H. vi. p. 265. N. 
