MoUusca of the Arabian Sea, &c. 87 



in the Persian Gulf; it occurs, according to Mr. Townsend, 

 from low-water mark to 5 fathoms on muddy sand off the 

 Mekran coast of Beluchistan. 



Mangilia perlonga, sp. n. (PL I. fig. 5.) 



M. testa multum attenuata, fusiformi, solida ; aufractibus octo, in- 

 chisis diiobus apicalibusvitreis, perlaevibus, nitidis, longitudinaliter 

 fortiter paiicicostatis, costis ultimi anfractus in numero septem, 

 spiraliter rudi-liratis, et inter liras arctissime tenuistriatis, liris 

 in anfractibus supernis tribus, in penultimo quatiior, in ultimo 

 obscurioribus, sex vel septem ; apertura ovata, labro crassiusculo, 

 sinu perobscuro, columella recta, canali brevi. 



Long. 7*50, lat. 2 mm. 



Hah. Karachi. 



A very attenuate species, fusiform, solid, eight-whorled, 

 inclusive of the two glassy shining apical, longitudinally 

 strongly ribbed ; ribs few, being seven on the last whorl, 

 crossed spirally with few intersecting liise, and between these 

 run many fine stiiations. The aperture is ovate, outer lip 

 thickened, sinus very obscure, columella straight, canal short. 



Allied in form to M.fulvocincta, Nevill, an Indian species, 

 but more attenuate, and with only two, as against four, 

 vitreous apical whorls. Dimensions about the same. 



Mangilia thesheloidts ^ , sp. n. (PL I. fig. 6.) 



M. testa fusiformi, versus apicem attenuata, solidiuscula : anfractibus 

 septem, apicali (in nostris speciminibus imperfecto) nigrescente, 

 caeteris turritis, ventricosulis, la3te ochraceis, apud suturas et ad 

 medium anfractus ultimi inter costas brunneo-zonatis, et aliter 

 superficie omni brunneo-ochraceo sparsim depicta, costis longitu- 

 dinalibus fortibus spiraliter striatis, anfractu ultimo ad undecim ; 

 apertura angusta, oblonga ; labro esteriore albo, incrassato, sinu 

 perobscuro ; columella recta, apud basim brunnescente. 



Long. 8, lat. 4 mm. (sp. maj.). 



Hah. Karachi. 



Shell fusiform, attenuate towards the apex, somewhat 

 solid, seven-whorled, the apical whorl imperfect in all the 

 examples examined, tinged with blackish brown; the rest of 

 the whorls are turrcted, tumid, brightly ochraceous, orna- 

 mented with strong longitudinal ribs, which number eleven 

 on the last whorl ; these are crossed by spiral close strife, 

 which are not shown on older worn specimens. The most 

 conspicuous feature is a series of darker blackish-brown zones, 



* Theskeloides, from the resemblance to M. theskela. 



