DESCRIPTIONS OF NEW SpECIES OF MARINE SHELLS. 511 



there is a double row of transverse gemmas, and the rest of the whorls 

 are ornamented with plain, transverse, raised lines or small costse. The mouth 

 is oblong, and the coluaoellar plait is large and strong. 



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

 precisely similar, having, unfortunately, got mislaid. 



E , ,ia\tju.os is a Homeric adjective for " comely," the Latin formossus, and is 

 well bestowed upon this little shell. 



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



O. testa ovato-fusiformi, tenui, crystallina, lsevi, nitida, anfractibus 6 apud 

 suturas multum impressis, ventricosulis, sub lente spiraliter tenuissime calca- 

 rio-lineatis, apertura ovato oblonga, margine columellari uniplicato, plica recta 

 conspicua. Long. 2, lat. 1 mm. 



A typical Odostomia, 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 ivrioXio^ " eastern." 



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

 O. 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 syrnoliodes, n. sp. PI. Fig. 13. 



0. testa attenuata, f usiformi, alba, parum nitente, delicata, anfractibus (5, 

 apud suturas impressis, apertura oblonga, labro fere continuo, marginem apud 

 columellarem fortlter 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 Syrnola 

 in miniature, hence the specific name. Of the typical form of the genus, 

 allied to 0. plicata, Montagu. 



18. Pyrgulina pyrgomella, n. sp. PJ. Fig. 24. 



P. testa attenuata, fusif ormi, gradata, Candida, anfractibus 7, ad suturas 

 subimpressis, longitudinaliter, ad medium anfractuum, costulatis, costis 

 laevibus, papillosisque infra juxta suturas, apertura oblonga, labro exteriore 

 simplice, paullum reflexo, columellari conspicus uniplicato. Long. 5 mm, 

 p. maj., lat. 1'25 mm. 



Two specimens of a conspicuously beautiful species, of the same facies as 

 Turbonilla scalaris, Phili., but white, whilst the columellar plait gives it 

 generic distinction. 



The longitudinal ribs begin at a little distance from the sutures, the 

 immediate space between being quite smooth, and the ribs ar6 also slightly 



