114 PROCEEDINGS OF THE MALACOLOGICAL SOCIETY. 



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

 immediate space between being quite smooth, and the ribs are also 

 slightly papillose at the upper end, the papillae merging into the rib. 

 The specitic name is derived from the Greek Trupyivjua, 'a tower,' 

 from the turreted whorls. It may possibly be equally well placed 

 in the genus Mormula, Ad. 



19. Pyegulina Edgaeii, n.sp. PI. VIII, Fig. 21. 



P. testa angusta, fusiformi, gradatula, tenui, Candida, anfractibus 6, 

 ad suturas imprcssis, undique longitudinaliter crassieostulatis, costis 

 scalariformibus, interstitiis transvcrsim tenuissime striatis, apcrtura 

 ovata, margine columcllari fortiter uniplicato. Long. 2, lat. 'lb mm. 



About twenty specimens. This species I venture to name after 

 !Mr. Edgar A. Smith, as a very small token of appreciation for his 

 invariable kindness and assistance. The smaller size, turreted or 

 graduate whorls, thick, longitudinal, scalariform ribs, and extremely 

 line tran.sverse striations, differentiate this little species from Pyrgulina 

 mterstriata, Souverbie, and other allies. 



Amongst the Bombay species of this genus, which is sometimes 

 taken as a section of Odostomia, the following occur, in more or 

 less plenty : — 



P. eallista, Melvill. Twelve of this most beautiful form in the 

 second consignment of shell-sand ; only four in the first. 



P. casta, Adams. A few, not quite typical; may be a different 

 species. 



P. interslriata, Souverbie. I cannot separate the most abundant 

 species at Bombay from this. I have specimens from the Gloyne 

 Collection, from XJpolu, precisely similar. 



P. pyrgomella, n.sp. 



P. Edgar a, n.sp. 



20. Tuebonilla Abeeceombiei, n.sp. PI. VIII, Fig. 7. 



T. testa pergracili, attenuata, albida, nitida, anfractibus 11-12, 

 subturritis, omnibus longitudinaliter recticostatis, costis interstitiisque 

 a3que loevissimis, anfractu apicali in specimine juvenali, heterostropho, 

 vitreo, apertura subquadrata, peristomate simplice. Long. 4, lat. 1mm. 



Three specimens, of which two are juvenile, showing the apical 

 nucleus, and the third mature, but not quite perfect. Conjecturally, 

 the whorls would be eleven or twelve. The longitudinal ribs are 

 straight, the whole surface is very smooth, and the mouth is square. 

 I have much pleasure in associating with this species the name of 

 my friend Mr. Abercrombie, to whose kindness I am indebted for 

 the whole of the material descanted upon in this paper. 



21. TuEBONiXLA soROEiA, n.sp. PL VIII, Fig. 17. 



T. testa gracili, attenuata, albido-ochracea, semipcllucida, tenui, 

 apice heterostropho, anfractibus 11-13, subventricosis, undique longi- 

 tudinaliter recticostatis, costis, interstitiisque Isevissimis, apertura 

 ovata, peristomate simplice. Long. 6mm. sp. maj., lat. 1mm. 



Several specimens, in various stages of growth ; the younger shells 



