MELVILL : NEW MARINE SHELLS FROM BOMBAY. 113 



A very small but well-marked shell, its sculpture being distinct. 

 The whorls, six in number, of which two are very small and apical, 

 one tui'reted, being much compressed — almost canaliculate — at the 

 sutures. Below the sutures there is a double row of transverse 

 gemmje, and the rest of the whorls are ornamented with plain, 

 transverse, raised lines or small costal. The mouth is oblong, and 

 the columellar plait is large and strong. 



Only one specimen is in existence, one other, which was in all 

 respects precisely similar, having, unfortunately, got mislaid. 



Ettd\i/iio9 is a Homeric adjective for 'comely,' the Latin formosus, 

 and is well bestowed upon this little shell. 



16. Odostomia antelia, n.sp. PI. VIII, Fig. 22. 



0. testa ovato-fusiformi, tenui, crystallina, laDvi, nitida, anfractibus 6, 

 apud suturas multum impressis, ventricosulis, sub lente spiraliter 

 tenuissime calcario-lineatis, apertura ovato oblonga, margine colu- 

 mellari uniplicato, plica recta, conspicua. Long. 2, hit. 1mm. 



A typical Odostotnia, with translucent, white, polished surface, six 

 whorls, ventricose, deeply impressed at the sutures, giving a gradate 

 appearance to the shell ; under a lens in certain strong lights very 

 indistinct, chalky, transverse lines are seen on the surface ; the aperture 

 is ovate-oblong, the lip simple, the columellar plait being straight and 

 conspicuous. 



The specific name is the Greek rlf T/yX(09, ' eastern.' 



It has some affinity with certain European species, e.g. 0. eulimoides 

 and 0. rissoides, of Hanley. 



Another species of Odostomia has, unfortunately, been mislaid. It is 

 a very distinct form, a little larger than the preceding, with the 

 whorls (seven) deeply channelled at the sutures, shape conically 

 fusiform, columella with strong plait, aperture internally spirally striate. 



17. Odostomia syrnoloides, n.sp. PI. YIII, Pig. 13. 



0. testa attenuata, fusif'ormi, alba, parum nitente, delicata, an- 

 fractibus 6, apud suturas impressis, apertura oblonga, labro fere 

 continuo, marginem apud columellarem fortiter uniplicato. Long. 2*50, 

 lat. 1 mm. 



A smooth, dull white, six-whorled little shell, the apex vitreous, 

 mouth ovate, with a strong straight plait on the columellar margin. 

 Like a Sijrnola in miniature, hence the specific name. Of the typical 

 form of the genus, allied to 0. plicata, Montagu. 



18. Pyrgulina rriiGOMELLA, n.sp. PI. YIII, Pig. 24. 



P. testa attenuata, fusiformi, gradata, Candida, anfractibus 7, 

 ad suturas subimpressis, longitudinalitcr, ad medium anfractuum, 

 costulatis, costis laevibus, papillosisque infra juxta suturas, apertura 

 oblonga, labro exteriore simplice, paullum retlexo, columellari con- 

 spicue uniplicato. Long. 5mm. sp. maj., lat. l"25mm. 



Two specimens of a conspicuously beautiful species, of the same 

 facies as Turhonilla scalar is, Phil., but white, whilst the columellar 

 plait gives it generic distinction. 



