1901.] MOLLUSKS FROM THE PERSIAN GULF. 395 



CiNGULiNA SPINA Crosse & J^iseh. 



I. Karachi. Much rarer than the last. 



Odostomia antelia Melv. 



P.G. Gulf of Oman, lat. 24° 49' N., long. 55° 56' E. 225 

 fathoms, mud. 



I. Karachi, very rare. Bombay (Abercrombie). 



Odostomia carinata H. Ad. 

 RG-. Bushire. 



1. Karachi, off mud at anchorage. 



Odostomia eutropia Melv. 



P.G-. Bushire ; lat. 26° 23' N., long. 54° 53' E. 250 fathoms. 



M.C. Charbar. 



I. Karachi, on mud in 25 fathoms. 



Very near to two of Adams's Japanese species, 0. subangulata 

 and 0. tenera, especially as concerns tlie body-whorl and carination, 

 but differing in the shape of the mouth. 



Odostomia litiopina, sp. n. (Plate XXIII. fig. 1.) 

 0. testa parva, subrimata, Icevi, tenui, semipellucida, cornea ; an- 

 fractibus 4^, quorum 14 apicales, Iceves, nigrescentes, cceteris ad 

 suturas gradatidis, ventricosis, ultimo oblongo^ tumidido ; apertura 

 ovata, lahro tentd ; columella haud incrassata, uniplicata. 

 Long. 2, lat. 1 mm. 



Hab. Gulf of Oman. Lat. 25° 24' N., long. 57° 27' E. ; at 241 

 fathoms. Also lat. 25° 31' N., long. 57° 14' E. ; 198 fathoms, mud. 



A very minute and somewhat obscure species. It appears to 

 have nearly attained its full growth, though the peristome is still 

 thin. Theprotoconch does not seem heterostrophe, though slightly 

 involved ; the whorls are tumid, thin, olivaceous ; mouth oval ; 

 columella once-plaited. It is superficially not unlike a Litiopa, 

 whence the specific name. 



Odostomia major, sp. n. (Plate XXIII. fig. 2.) 

 0. testa oblonga, Icevi, nitida, alba, apud apicem paullum attenu- 

 ata; anfractibus novem, apicali Icevi, vitrea, Jieterostropho, cceteris 

 planatis, infra sutm-as zona subpellucida interna decoratis, 

 ultimo anfractu obscurissime sub lente spircditer albostriato ; 

 apertura paidlum effusa, ovata, intus striata ; labro continuo, 

 tenui ; columella fortiter implicata. 

 Long. 6, lat. 2 mm, 



Hccb. I. Karachi. 3 fathoms. 



Not so frequent as 0. eutropia Melv., which occurs in the same 

 locality. It is amongst the largest of the genus, and also distin- 

 guished by its oblong, attenuately fusiform shape, perfect smooth- 

 ness, and aperture slightly effuse, striate within, three apical strise 

 showing semipellucently through on the body-whorl. There are 

 no signs of peripherial carination. 



