1901.] MOLLUSKS FROM THE PERSIAN GULF. 455 



spira celata, a pice umbilicato; aperture supra angusta, ad basim 

 effusiore ; columella simplice, paullwm mcrassata. 

 Alt. S. diam. 3'25 mm. 



Ha.b. Persian Gulf. Bushire and near Fao. 

 Gulf of Oman, Maskat. 15 fathoms. 

 Gulf of Oman. 208 fathoms. 

 Mainly conspicuous by its fragility and delicate transverse 

 undulating stria?, these being punctate in the upper portion of 

 the body-whorl. The mouth is slightly dilated below, lip fairly 

 straight, columella slightly thickened. Several examples. 



Ctlichxa citExiLABius, sp. n. (Plate XXIV. fig. 22.) 

 C. testa bi-evi, calcareo-alba, subperforata, bullata, ovata, crassi- 

 vscula, undique arctisgime spiraliter minute punctata ; apertura 

 obloneja, supra constricta, infra paullum Jilatata, labro incrassato, 

 pulchre crenxdato ; columella ad basim effusa, "hand plicata, 

 simplice. 

 Alt. 3*50, diam. 1*75 mm., sp. maj. 



llab. G-ulf of Oman, lat. 2±- 5' X'., long. 57° 25' E. 

 205 fathoms, mud. 



Minute, but highly sculptured with close spiral punctuation, 

 the outer lip thickened and beautifully crenulate, a peculiarity we 

 have seen in no other Tectibranch we can remember. Our speci- 

 mens are mostly full-grown, though they be all so inconspicuous. 

 About fifty examples were dredged at the above locality. 



Cylicitxa ctlixdracea Pennant. 



P.G. Gulf of Oman, Maskat. 15 fathoms. 



Lat. 27° 18' X"., long. 51° 52' E. 27 fathoms, mud. 



Lat. 24° 05' X'., long. 57" 35' E. 205 fathoms, mud. 



1. Bombay (Abercrombie). 



Evidently the British, European, and Mediterranean species. 



Cylicitxa faoe>-sis, sp. n. (Plate XXIV. fig. 23.) 

 C. testa angusta, cylindrica, tenui, alba, paullum nitente, urn- 

 bilicata, longitudinaliter hie illic irregulariter indistincte striata, 

 spiraiiter apud extremitates distincte ail medium leniter sulcato- 

 striata ; apertura angusta, lunata, infra latiore, labro elliptico, 

 crassiusculo ; columella obscure uniplicata, crassiuscula, alba, 

 nitente. 

 Alt. 8, diam. 3*30 mm. 



Hab. Persian Gulf, Busbire, and towards Fao. 

 A narrow, barrel-shaped Oylichna, thin, whitish, slightly shining, 

 spirally striate, but more conspicuously so at the extremities ; outer 

 lip rising just beyond the umbilicus, scarcely angled, thence 

 somewhat elliptic, rounded at the base ; aperture narrow, columella 

 obscurely onee-plaited. 



Three ?ery minute species of Oylichna, O. consanguinea, per- 

 pusiUa, and pumilissima, all of E. A. Smith, have been described 

 (Ann. V Ili-t. Ber. 1. i\. pp. 352, 363) as dredged bj Col. Pelly 

 in the Persian ' l-ulf at 1 I Eat \\<>\w<. 



