MKLVILL : GASTROPODA FROM THE PERSIAN GULE, ETC. 165 



profundo, columella tenuiter callosa, alba, nitente, canali producto, lato. 

 Lon<?. 32, lat. 10 mm. 



Hab.—iinU of Oman, lat. 24° 49' N., long. 56° 56' E., 225 fathoms, 

 mud bottom, October 26th, 1900. 



Only one example occurred of a Surcula, delicate in texture, 

 possessing all the attributes of an abyssal species, but with some 

 resemblance to F. (Surcula) undatiruga, Bivona { = tenuis, Gray), from 

 the Mediterranean. That species, however, is nodulous on the angles, 

 with far more frequent and very sinuous thin longitudinal ribs. 

 Some similarity to P. [Surcula) si/mbiotes, Wood- Mason & Alcock, 

 may likewise be traced. This species came from South Indian seas, 

 lat. 7° 04' N., long. 76° 34' 15" E., in 1043 fathoms,^ and is a larger 

 shell, 57 mm. in length, and a great deal broader in proportion, say 

 19 diam., the canal being not so produced, and the whorls fai* more 

 compressed suturally. 



Clathurella Polyhymnia,^ n.sp. PI. X, Fig. 17. 



CI. testa oblongo-fusiformi, tenui, pallide ochracea vel alba, anfrac- 

 tibus 8, quorum apicales 2 vitrei, bulbosi, ca^teris ventricosis quadrato- 

 decussatis, ad juncturas lirarum gemmatis, gemmis nitentibus, inter- 

 stitiis alveolatis, apertura oblonga, labro incrassato, intus tridenticulato, 

 sinu lato, conspicuo, columella quasi-plicifera. Long. 8, lat. 3 mm. 



A very pretty little species, with thickened longitudinal and spiral 

 lirae, beaded at the points of junction. 



Mangilia adamantina, n.sp. PL X, Fig. 18. 



M. testa fu.siformi, semitetragona, solidula, alba, anfractibus 6-7, 

 duobus apicalibus albo-lacteis, vitreis, perla^vibus, his proximo Isevi, 

 arete longitu(Hnaliter gemmato-costulato, cseteris crassicostatis (numero 

 costarum anf ractus ultirai circa 11), simul ac spiraliter arete multiliratis, 

 supra medium unicarinatis, apertura oblongo-ovata, labro crassiusculo, 

 intus iuterdum ochro-marginato, columella fere recta, canali brevi. 

 Long. 4, lat. 1-50 mm. 



A minute, somewhat diamond-shaped form, white, once spirally 

 keeled, moderately longitudinally ribbed, and crossed with numerous 

 spiral lirse, somewhat resembling M. apollinea, described in this paper, 

 but that species is quite smooth. 



Mangilia Aglaia, n.sp. PI. X, Fig. 19. 



M. testa gracillima, fusiformi, delicata, anfractibus 11-12, quorum 

 apicales 3-4 ochi-acei, sub lente pulcherrime decussati, caeteris apud 

 suturas impressis, ventricosis, spiraliter tri- vel quatuor-liratis, liris 

 crassis, undique longitudinaliter costatis, costis anfractuum superiorum 

 rudioribus, ultimi numero circa 14, apertura oblonga, labro incrassato, 

 fimbriato, sinu lato sed non profundo, canali producto. Long. 10, 

 lat. 3 mm., spec. maj. ; long. 8, lat. 2 mm., spec. min. 



' Ann. & Mag. Nat. Hist., ser. vi, vol. xiv, p. 161, pi. iii, figs. 7, 8. 

 ^ Polyhymnia, the Muse of song. 



