157 



Descriptions of marine Gastropoda from Ceylon, Sfc. ; — 



by Messrs. G-. and H. Nevill. 



[Received and read 3rd February, 1869.] 



This paper is a continuation of the one we had the honour of 

 placing before the Society at the August meeting of last year (18G8). 

 These new species, as likewise those previously described, were, with 

 one exception, collected in the Southern Province of Ceylon, mostly 

 near Balapiti ; the Rapana, one of us had previously also found at La 

 Reunion (Bourbon). We have also seen several of the small species 

 of TitocHiDiE from Bombay and Arakan, probably all of them are to 

 be met with along our coasts, though the small and interesting 

 little species, we have here named Muchelus Seychellarum, we have 

 never met with anywhere in these seas, except at the Island of Mahe, 

 one of the Seychelle group. 



Clanculus Ceylonicus-N. S., Pi. XVII, Fig. 7. 



T. parva, turbinata ; anfractibus senis, convexiusctdis, albescentibus, 

 prope suturam posteriorem maculis fuscis transversaliter prolomjath 

 notatis, ad suturam anterior em puncturatis ; costulis spiralibus quinis 

 in quoque anfractu granulosis ; sutura subprofunda ; ultimo anfractu ad 

 peripheriam subrotundato ; basi leviter convexiuscida, granulato-costu- 

 lata, umbilicata : umbilico margine incrassato ac denticulato circum- 

 scripto ; apertura qiiadr angular i, labro intus crasse costulato, labio 

 calloso, recto, ad medium obsolete, antice crasse dentato. 



Alt. 7 Mil.—Diam. maj. 7 Mil. 



Abundant. — S. Prov. Ceylon ;— also occurs at Bombay. 



Euchelus Seychellarum— N. S. } Pi. XVII, Fig. 10. 



T. parva, depresso-conica, sub-globulosa, alba, solidida ; anfractihm 

 quaternis, convexiusctdis, sutura impressd junctis, costulis spiralibus 

 minute sed confertim granulatis ornatis ; ultimo anfractu ad peripheriam 

 rotundato ; basi convexd, spiraliter (jranulato-costulata, anguste 

 umbilicata ; apertura subrotundata : labro uniforme arcuato, ad mar- 

 ginem obtusiusculo, intus sulcato ; labio recto, oblique decurrente, antice 

 denticulo parvo instructo. s 



Alt. 2J Mil.—JDiam. maj. 3 Mil. 



Scarce.— Island of Mahe (one of the Seychelle group). 



