202 Mv. J. C. MelviU on 



tion and concentric stvi^ 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. (PL XII. fig. 9.) 



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

 epidermide olivacea rudi contecta, ad medium plerumque detrita ; 

 umbonibus parvulis, contiguis ; margine dorsali postice I'ecto, 

 producto, denique ovato-rotundato, autice leniter declivi, rotun- 

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

 palliali profundo. 



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



An ordinary-looking mollusk, but not agreeing exactly in 

 form with N. gangetica, 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 {TeUineUa) manumissa f, sp. n. 

 (PI. XII. fig. 10.) 



T. testa oblonga, crassiuscula, paullum intequilaterali ; umbonibus 

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

 postice oblonga, marginem apud ventralem paullum convexa, 

 extus, superficie albida, a dorso centrali ventralem usque ad 

 marginem pulcherrime roseo-sufifusa, spiraliter delicate striata, sub 

 lente striis lougitudinaliter decussatis, apud margiues fere 

 evauidis ; intus pagina iu medio rosea, circiter albo-marginata, 

 linea palhali augulutim ad medium adscendente. 



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



* ^vprjKris, keen, as a razor, 

 t Manumissa, set free. 



