1870. | MR. H. ADAMS ON AFRICAN SHELLS. 379 
subduplicato, interno brevi, recto, ad marginem columellarem sub- 
continuo, externo annulato, expanso. Operc. normale. 
Diam. maj. 16, min. 14, alt. 9} mill. 
Hab. Taiwan, Formosa. 
9. MELANIELLA BREVICULA, H. Ad. (Plate XXVII. fig. 12.) 
M. testa ovoidea, decollata, solidula, longitudinaliter oblique striata 
et lineis nonnullis vix elevatis cincta, olivaceo-fusca, interdum nigro- 
castaneo fasciata ; spira anfr. superstitibus 3, convexiusculis, su- 
tura impressa ; anfractu ultimo inflato ; apertura ampla, pyri- 
JSormi, antice producta, teste longitudinis } equante ; intus ceru- 
lescente ; columella callosa, alba. 
Long. 17, lat. 10 mill. 
Hab. Amoy, China. 
10. Dreissena swinHoel, H.Ad. (Plate XXVII. fig. 13.) 
D. testa solidiuscula, arcuatim triangulo-cordiformi, nitida, plicis 
rugosis, irregularibus, concentricis et costis medianis paucis radi- 
antibus munita, castanea ; apicibus terminalibus, proximis, com- 
pressis ; valvis fastigio umbonali valde elevato, acuto, sinuato ; 
margine dorsali arcuato, portione ligamentali recta ; margine ven- 
trali incurvato, in medio hiante ; intus livescente. 
Long. 14, lat. 9, alt. 5 mill. 
Hab. On rocks in the Yangtsze river at Kweifoo, China. 
6. Descriptions of Two New Species of African Land Shells. 
By Henry Apams, F.L.S. 
(Plate XXVII.) 
1. Hexrx (Corttia) pAmarensis, H. Ad. (Plate XXVII. 
figs. 14, 14a.) 
H. testa umbilicata, discoidea, solidula, oblique confertissime capil- 
laceo-striata, supra albido-fulva, infra albida, ad peripheriam pal- 
lide fulvo fasciata ; spira convexa, apice obtuso, sutura impressa ; 
anfr. 6, convexiusculis, ultimo antice soluto, subito descendente, 
peripheria subcostato-carinato, basi convexo, juxta aperituram com- 
presso; apertura perobliqua, angulato-circulari ; perist. continuo, 
late expanso, lamina parietali valida intrante et dentibus tribus 
obtusis profundis illi oppositis munito. 
Diam. maj. 9, min. 7, alt. 4 mill. 
Hab. Damara Land, South-west Africa (Coll. Angas). 
This species is closely allied to H. seulpturata, Gray, which is 
from the same locality. 
2. Ennea (Gonospira) rINGENS, H. Ad. (Plate XXVII. 
fig. 15.) 
E. testa rimata, fusiformi, ovata, solida, longitudinaliter confertim 
