neio Mollusca ffom Aden, 201 



me, Tt is very small, fusiform, glassj, transparent, eight- 

 whorled, including the apical, quite smooth, not impressed 

 at the sutures, shining-^ and around the middle of the whorls 

 ornamented with regular round masses composed of red 

 dots, which also run more sparingly towards the base of 

 the last whorl. The mouth is oblong, the outer lip thin, 

 simple, the columellar margin nearly straight. 



The label accompanying this species has, unfortunately, 

 got mislaid, and it is possible it was found further to the east 

 than Aden ; but at all events it is an inhabitant of the North 

 Indian Ocean (Arabian Sea). 



Leptothyra yemenensis^ sp. n. (PI. XII. fig. 7.) 



L. testa solidula, globuloso-conica, vix perforata, albida ; anf ractibus 

 quatuor, paullum ventricosis, ad suturas impressis, ultimo rapide 

 accrescente, undique delicate liratis, hie illic puniceo-maculatis, 

 liris in ultimo anfractu circa sex et vigiuti ; apertura circulari, 

 intus alba, labro paullum eiFuso, columella dilatata, et apud 

 basin producta. 



Alt. 4, diam. 4-50 mm. 



Not the least beautiful of the genus, abounding as it does 

 in lovely and often brightly coloured little species. I 

 cannot exactly match this with any of the numerous forms 

 described. It is near L. marmorea^ Pease, from the Hawaiian 

 Archipelago. It differs in being slightly perforate, and the 

 aperture not ovate but circular ; the whorls, too, are hardly so 

 sloping, and the spiral lirte are fine and more pronounced. It 

 resembles in form some of the large Turbinidse with strongly 

 dilated base to the columella, e. g. crassus, Wood, spai'verius, 

 Gmel., funiciolosusj Keeve. The fine lirai are spotted irre- 

 gularly with pink, but the prevailing colour is whitish straw, 

 these spots being very inconspicuous. 



Calyptrcea [Galerus) Edgariana^ sp. n. 

 (PI. Xll. fig. 8.) 



C testa conica, pileoliformi, vertice acuto, oblique declinante, 

 radiatim rudi-costata, costis rugosulis, coucentrice striata, interiore 

 purpurascente, apud marginem pallidiore, appendice interna 

 parva, appressa, circiter induiata, ad latus affixa. 



Alt. 8, lat. ib mm. 



Doubtless a polymorphous species like the majority of its 

 congeners, adapting itself so as to suit any location it may 

 have chosen. The specimen before us is to some extent 

 covered externally with marine growth, but the rugose radia- 



Ann. (& Mag. N. Hist, Ser. 7. Vol. \. 16 



