202 Mr. J. C. MelvlU on 



tion and concentric stvige are, with care, discernible. The 

 apex is prominent, obliquely declining. Within, the surface 

 is shining, purple, paler towards the margin. The septum is 

 small, adpressed, and thickened both in itself and around ; it 

 is placed on the side of the apical declination. 



A specimen of what is almost certainly this shell is in the 

 British Museum, also from Aden, and is mentioned (but not 

 named) by Mr. E. A. Smith in Proc. Zool. Soc. 1891, p. 418, 

 differing from our example in being more elevated and not 

 having such complete uniformity of interior purple colora- 

 tion, but otherwise similar. Named in honour of Mr. Edgar 

 Smith. 



Novaculina xyreces^^ sp. n. (PI. XII. fig. 9.) 



N. testa cylindrico-elongata, inaequilaterali, utrinque bisulca, alba, 

 epidermide olivacea rudi contecta, ad medium plerumque detrita ; 

 umbonibus parvulis, contiguis ; margiue dorsali postice recto, 

 produeto, denique ovato-rotimdato, antice leniter dcclivi, rotun- 

 dato, margine ventrali fere recto ; intus pagina alba, nitida, sinu 

 pallia] i profundo. 



Alt. 15, lat. 32, diam. 8 mm. (spec, majoris). 



An ordinary-looking mollusk, but not agreeing exactly in 

 form with iV. yanyetica, Benson, or the few other described 

 species. We have no particulars of the exact habitat, but no 

 doubt it was found in like situations as the others of this 

 genus in the mud of fluviatile estuaries. It is posteriorly a 

 very elongated shell, more or less covered with a dirty oliva- 

 ceous epidermis, more rounded anteriorly, and has an almost 

 straight ventral margin. The valves gape at both extre- 

 mities. 



Tellina {Tellinella) inanuniissa'f, sp. n. 

 (PI. XII. tig. 10.) 



T. testa oblonga, crassiuscula, pauUum inaequilaterali ; umbonibus 

 parvis, rectis, dorsaliter utrinque leniter declivi ; antice rotundata, 

 postice oblonga, marginem apud ventralem paullum convexa, 

 extus, superHcie albida, a dorso ccntrali ventralem usque ad 

 marginem pulchGrrimeroseo-suffusa,ppiraliter delicate striata, sub 

 leute striis longitudinaliter dccussatis, apud murgiucs fere 

 evanidis ; intus pagina in medio rosea, circiter albo-marginata, 

 linea palliali augulatim ad medium adscendente. 



Alt. 1-50, lat. 2-bO, diam, -25 unc. 



* ^vpr]KT]s, keen, as a razor, 

 t Manumissa, set free. 



