152 Zoological Society. 



margin ; aperture with the anterior margin folded in the form of a 

 gutter or channel ; surface cancellated. 

 Hemitoma, Swainson. 



1. SuBEMARGiNULA GALEATA, A. Adams. S. testd griseo-rufes- 

 cente, elevato-conied, tenvi, vertice suhcentrali, postice inclinato, 

 costis tuberculosis, radiantibus, albidis, et lineis transversis, ele- 

 vatis, subclathratis, costd anficd prominenti ; aperturce mar- 

 ffine dentato, aniice valde sinuate, sinu intus in canalem pro- 

 ducto. 



Hab. Philippine Archipelago. Mus. Cuming. 



2. SuBEMARGiNULA ARABiCA, A. Adams. 5. tcstd albidd, 

 crassd, depresso-conicd, vertice obtuso subcentrali, postice in- 

 clinato ; costis radiantibus tuberculosis et liris elevatis trans- 

 versis clathratd ; aperturce margine incrassato, crenato, anticb 

 sinuato, sinu intus in canalem producto. 



Hab. Red Sea. Mus. Cuming. 



3. SuBEMARGiNULA ALVEOLATA, A. Adams. S. tcstd tcnut, 

 albd, subpellucidd, depresso-conicd, vertice subcentrali, postici 

 inclinato ; costis radiantibus lirisque transversis irregulariter 

 alveolatd ; costis ad liras nodulosis ; alveolis pellucidis ; aper- 

 turce margine dentato, antice sinuato, sinu intus in canalem 

 producto. 



Hab. Honduras. Mus. Cuming. 



4. SuBEMARGiNULA IMBRICATA, A. Adams. S. tcstd ovato- 

 oblongd, subquadr angular i, cinereo-albidd, vertice parvo, cen- 

 trali, postice inclinato ; costis radiantibus imbricato-asperis, 

 intequalibus, et lineis crassis irregularibus incretnenti decus- 

 satd ; aperturce margine dentato, antich valdh sinuato, sinu 

 subquadrato, intus in canalem producto. 



Hab. Mouth of Victoria River, north-east coast of Australia, under 

 stones, low water. Mus. Cuming. 



5. SuBEMARGiNULA PUMiLA, A. Adams. iS. testd orhiculato- 

 ovali, valde depressd, apice subcentrali, postice inclinato ; costis 

 radiantibus, nodosis, incequalibus, et lineis elevatis concentricis 

 incrementi, decussatd ; aperturce margine denticulato-crenato, 

 antice profundi sinuato ; sinu subquadrato, intus in canalem 

 producto. 



Hab. ? Mus. Cuming. 



6. SuBEMARGiNULA CATiLLUf^, A. Adams. S. tcstd elongato- 

 ovali, valde depressd, vertice vix elevato, postick inclinato ; 

 costis radiantibtis nodulosis, crassis, et lineis incrementi trans- 

 versis, ornatd ; aperturce margine irregulari, crenulato, intus 

 calloso, antice valde sinuato. 



Hab. ? Mus. Cuming. 



7- SuBEMARGiNULA DENTicuLATA, A. Adams. S. testd clon- 

 gato-ovali, albd, novem-radiatd, vertice acuto postice inclinato, 

 costis novem, crassis, rugulosis, radiantibus ; intervalUs costel- 

 latis, costellis longitudinalibvs, asperulatis ; aperturce margine 



