from the Persian Gulf, &c. 145 



Allied most nearly to the much larger T. Candida, Ad., 

 and also to T. mater na and unicincta, Melv. From the 

 last of these it differs in more frequent costulations and 

 absence of any spiral coloured baud ; from materna in greater 

 delicacy of substance, and also in the straight smooth riblets 

 beinjr closer and almost double in number. 



Turbonilla umbrina*, sp. n. (PL IV. fig. 11.) 



T. testa attenuata, solidula, compacta, sordide brunnea, lam ; an- 

 fractibus 15-10, inclusis apicalibus heterostrophis, omnibus ad 

 suturas impressis, undique arete costulatis, costis crassis, rectis, 

 interstitialiter superficie laevi, ultimo anfractu infra peripheriam 

 laevigata, costis evanescentibus ; apertura fere rotunda, parva, 

 labro vis effuso, columella recta. 



Long. 8, lat. 1*75 mm. 



Hab. Karachi, 1906. 



A somewhat coarsely built Turbonilla, of a dull brown 

 colour throughout; whorls fairly impressed suturally, longi- 

 tudinal riblets frequent, straight, close, interstices quite 

 smooth; mouth, proportionately speaking, small, roundish, 

 columella! - margin straight, outer lip hardly effuse. It was 

 very rare at the above locality. 



Eulimella squarrosida, sp. n. (PI. IV. fig. 16.) 



E. testa alba, delicata, tenui, anguste fusiformi, versus apicem 

 paullum cauda ta ; an tract ibus ad 14, quorum apicales 3 valide 

 heterostrophi, cseteris paullulum ad suturas impressis, laevissimis, 

 sub lente longitudinaliter albo-strigatis, ultimo anfractu duos 

 proximos longitudine exsequante ; apertura squarrosa, peristomate 

 tenui, columella fere recta. 



Long. 4*50, lat. 1 mm. 



Hob. Persian Gulf, Mussandam, 55 fathoms. 



A species plain in form, hardly impressed suturally ; whorls 

 smooth, straight ; mouth square, outer lip and columella 

 nearly straight. This differs from all the eight species 

 hitherto included in this fauna, perhaps coming nearest to 

 E. venusta f, ]\lelv., distinguished by its elegant pagodiform 

 whorls. 



* Umbra, shade, from the dusky colour. 

 t Proc. Make. Soc. vol. vi. 1904, p. 50, pi. v. fig. 15. 



