MELVILL— MAEINE MOLLUSCA. 79 



22. Clanculus margaritarius, Pliil. 

 Loc. Coetivy I. 



Seychelles : Praslin I. 

 Amirantes : St. Joseph. 



Chagos Archipelago : Barachois Maurice, Diego Garcia. 

 Allied to C. unedo. Ad. 



23. Clanculus mauritiamis, sp. nov. (Plate 5. fig. 5.) 



C. testa depresso-conica, pallide puniceo-bnmnea, profunde sed aiiguste umbilicata ; 

 anfractibus 6-7, quorum apicales duo minuti, rugosi, caeteris, prsecipue ante- 

 penultimo et penultimo, infra suturas angulatim gradatulis, ubique et arete 

 6-seriatim granulatis, tribus granorum ordinibus infra suturas conjunctim dispositis, 

 tribus iuferis, lineis spiralibus minutis interpositis, regione interstitiali oblique 

 striata, simili modo anfraetu ultimo usque ad peripheriam, ordinibus granorum 

 linea spirali inter se separatis, infra peripheriam tridecim ordinibus conjunctim 

 dispositis, puniceo tinctis et maculatis ; apertura oblique I'otunda, labro pauUum 

 effuso, iutus 4-5-lirato, regione unibilicari paucicrenata ; columella infra plicatula, 

 apud basin conspicue uniplicata. 

 Alt. 9, lat. 12 mm. 



Loc. Mauritius : Station A 4, 500-600 fathoms. 



A pale brownish-pink-coloured Clanculus, with obscure pink spotting basally, de- 

 pressedly conical, narrowly umbilicate, the umbilical region coarsely crenate, six- or 

 seven-whorled, the three lowest whorls possessing, firstly, three rows of close spiral fine 

 granules followed by others which have a fine spiral line dividing them, the interstices 

 being very finely obliquely striate. Next, on the last whorl, below the periphery, the 

 many — about 13 — sj)iral rows of granules are quite close together, with no intermediary 

 lines. The mouth is obliquely rotund, outer lip a little effuse, with four or five spiral 

 short lirse just within the orifice ; columella plicatulate above, and with a strong tooth- 

 like plait at the base. It is allied to C. unedo, A. Ad., and others of that section of the 

 genus. 



24 Monodonta australis. Lam. 



Trochus labio australis, Chemnitz, Coucli.-Cab. xi. fig. 1890. 

 Loc. Seychelles : Praslin I. 



25. Calliostoma duplicatum, A. Ad. 



Log. Amirantes : Station E 2, 29 fathoms, algal rubble. 



A small,* elegant species, allied to the Indian C. scohinatwm, A. Ad., endemic at 

 Bombay. This latter, however, is very much larger and somewhat broader in contour. 



26. Qibbula phasianella (Desh.). 



Turbo phasianellus, Desh. Moll, de Reunion, p. 74, pi. 8. figs. 11-13. 

 Margarita striatula, Philippi (sed ubi descript. f j. 



Loc. Amirantes : St. Joseph I. 



