] 26 JIK. E. A. SMITH OX L.VND-SHELLS FROM [Feb. 5, 



vLv hwrassatum, marginihus callo tenuijunctis, columellari supra 

 regionem v.nibilicalem fortiter rejle.co. callum crassum formante. 

 Lo)igit. Ij viillim., diam, I5 ; apertura | longa, i lata. 

 Hah. Banguey Island. 



The strong callus over the umbilical region is a characteristic 

 feature. There is very little surface-sculpture observable, merely 

 very faint lines of growth and a few minute spiral striae on the 

 body-whorl, visible only under the microscope. 



82. Georissa flatescexs. (Plate IV. fig. 17.) 



Testa globose turhinata, jlavescens, splraliter striata ; anfractus 

 tres, primus Icevis, globosus, secundus conve,i'lm(ndtis, svpenie 

 s'-ibhumerosiis, idtimus magnus, subglobosus ; apertvra semi- 

 circidaris, obliqua, longit, totiv^ g adcequaiis ; peristoma levit^r 

 iiicrassatum, marginibits callo temii Jimctis, coliimdlari oblique 

 rectiusculo, refl^xo, supra wnbilicum callum crassiitsctdum 

 formante. 



Longit. 1| millim., diam. li ; apertura 1 j longa, | lata. 



Bah. Gomanton, X.E. Borneo. 



Although spirally sculptured somewhat similarly to G. hosei, this 

 species differs in colour and the less angular penultimate whorl. 



83. G-EOBissA BOENEENsis. (Plate IV. fig. 18.) 



Testa imperforata, turbvnata, rufescens ; anfractus quatuor, 

 convexi, siitura canalicidata sejuncti, oblique striati, primus 

 globosus, IfEvis, idtimus antice paulo descendens, ad medium 

 obtuse sidjangulatus ; apertura parva ; peristoma rufum, intus 

 limbatum, marginibus callo fenui junctis. columellari obliquo, 

 via; arcuato, refiexo. 

 Longit. 2g millim., diam. fere 2; apertura 1 longa, | lata. 

 Hah. Gomanton, X.E. Borneo. 



This species has no spiral sculpture, but exhibits mereh' fine 

 striae of growth. The outer lip is distinctly thickened within 

 and of a bright red colour. 



EXPLANATION OF THE PLATES. 



Plate IL 



Fig. 1, 2. Xesta themis, p. 100. 



3. padasensis, p. 100. 



4. thisbe, p. 101. 



5, 6. Hemiplecta egeria, p. 102. 



7. prceculta, p. 101. 



8. densa, var. everetti, p. 101. 



9. rahorujensis, p. 102. 



10. Dyakid Ihidstedti, p. 103. 



11. si<6rf«ii&, p. 104. 



12. Trochonanina heraclea, p. 105. 

 13, 14. alexis, p. 105. 



15, 16. kina-baluensis, p. 105. 



17, 18. whitekeadi, p. 106. 



