1901.] MOLLFSKS FEOM THE PEESIAIS" GULF. 455 



spira celata. apice umhilicato; apertura supra angusta, ad basim 

 effusiore ; columella simplice, pauUum incrassata. 

 Alt. 8, diam. 3*25 mm. 



Ho.h. Persian Gulf. Busliire and near Fao. 

 Gulf of Oman, Ma,skat. 15 fathoms. 

 Gulf of Oman. 208 fathoms. 

 Mainly conspicuous by its fragility and delicate transverse 

 undulating strise, 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. 



Cylichxa CEEisHLABEis, sp. n. (Plate XXIV. fig. 22.) 

 C testa hrevi, calcareo-alba, siihperforata, bullata, ovata, cfassi- 

 uscula, undique arctissime spiraliter 'minute punctata ; apertura 

 oblonga, supra constricta, i7ifra patdlum dilatata, labro incrassato, 

 pidchre cremdato ; columella ad basim effusa, hand p)licata, 

 sim.jUice. 

 Alt. 3'50, diam. 1*75 m,m,., sp. maj. 



Hab. Gulf of Oman, lat. 24° 5' N., 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 ai-e mostly full-grown, though they be all so inconspicuous. 

 About fifty examples were dredged at the above locality. 



CxLiCHisrA CYLiisrDEACEA Pennant. 



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



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



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



I. Bombay (Abercrombie). 



Evidently the British, European, and Mediterranean species. 



CTLiCHisrA EAOENSis, sp. n. (Plate XXIY. fig. 23.) 

 C. testa ayigusta, cylindrica, tenv.i, alba, paullwn nitente, urn- 

 bilicata, longitudinaliter hie illic irregulariter indistincte striata, 

 spiraliter apiid eoctremitates distincte ad medium leniter sulcato- 

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

 crassiuscido ; columella obscure uniplicata, crassiuscula, alba, 

 nitente. 

 Alt. 8, diam. 3"30 mm. 



Hab. Persian Gulf, Bushire, and towards Fao. 

 A narrow, barrel-shaped Cyliclma, 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 once-plaited. 



Three very miuute species of Cyliclma, C. consangimiea, per- 

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

 (Ann. N. Hist. ser. 4, ix. pp. 352, 353) as dredged by Col. Pelly 

 in the Persian Gulf at 14 fathoms. 



