new Mollusca from South Africa. 1 | 
19. Planorbis Bowkert, sp. n. (Pl. III. fig. 19.) 
P. testa pallide cinerea, altiuscula, parum nitente, sublevigata ; 
anfractibus quatuor, deplanatis, rapide accrescentibus, disco supe- 
riore et inferiore eque excavatis ; apertura obliqui-rotundata. 
Long. 8°20, lat. 3°40 mill. 
Hab. North Transvaal (Col. Bowker). 
A species not unlike P. corneus in miniature. The surface 
under a lens is found to be very finely, obliquely, longitu- 
dinally striate. ‘The whorls are rounded, both the upper and 
lower disks being equally excavate. 
20. Planorbis Crawfordi, sp.n. (PI. III. fig. 20.) 
P. testa parva, compressa, obliqui-striata, cinereo-olivacea ; anfrac- 
tibus quatuor, lente crescentibus, discis utrinque subrotundatis, 
inferiore magis applanato; apertura depresso-lunari. 
Long. (sp. maj.) 1, lat. 5 mill. 
Hab. Van Staaden’s River (J. Crawford, Esq.). 
A small compressed species, whorls rounded and not angled, 
somewhat recalling our British P. albus. 
Three specimens. 
N.B.—In our last paper (Ann. & Mag. Nat. Hist. ser. 6, 
vol. xi., January 1893, pp. 20, 21) the descriptions of Pupa 
dysorata and Sykesit were, in part, accidentally transposed. 
Of the former the description should read thus :— 
Pupa dysorata, sp.n. (PI. III. fig. 4.) 
P. testa minutissima, oblonga, levi, apice obtuso; anfractibus quinque, 
tumescentibus, ventricosis; apertura ovali; peristomate albido, 
paullum reflexo, ad marginem columellarem incrassatum uni- 
dentato. 
Long. 1, lat. 55 mill. 
Hab. Griqualand East (#. R. Sykes, Esq.). 
And of the latter :— 
Pupa Sykesit, sp. n. (PI. III. fig. 6.) 
P. testa rimata, minuta, cylindrica, diaphana, apice obtuso ; anfrac- 
tibus septem vel octo, ventricosis, undique confertim longitu- 
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