MKLVILL : MOLLUSCA FROM PERSIAN GULK, ETC. 243 



SCALA PASIPHAES, 11. sp. PL XI, Fig. 4. 



Sc. testa eleganter fiisifornii, solidula, albo straminea, anfractibus 

 ad 10, quorum apicales parvi, laeves, caeteris rotundatis, veutricosulis, 

 ad suturas impressis, regulariter lamellatis, lainellis crassiusculis, 

 Ifevibus, infra suturas neqiuiquinn angulatis, interstitiis fiequaliter et 

 spiraliter rudi-striatulis, stiiis distantibu^i, paucis, apertura rotuuda, 

 2)eristoraate incrassato, eontinuo. Alt. 10, diam. 4'50nim. 



Hdh. — Persian Gulf, Bushiie. 



An elegant species, of fairly normal appearance, proportionately 

 solid, straw-coloured, witli rounded tumid whorls, the lamellae wliite, 

 smooth, incrassate, not at all angular above, the interstices between 

 the lamellae coarsely spirally striate, striae somewbat distant. 



I am very grateful to M. de Boury for his kind opiTUon as to the 

 distinctness of this species. 1 follow him in continuing to use tbe 

 familiar word ' Sca/a\ despite the fact that the followers of the rigid 

 rule of priority, including myself in a previous paper, bave superseded 

 it by the Boltenian luune Epitonmm. I venture also to express the 

 just hope that this rule may, by common consensus, some day be to 

 some extent so widened that names wbicli have been in constant 

 use, unchallenged till lately, for fifty to a hundred years or more, be 

 allowed to stand. 



[TraaKpdrji, glittering, conspicuous.) 



Trichotropis crassicostata, n.sp. PI. XII, Fig. 5. 



T. testa perparva, breviter fusiformi, imperforata, alba, in speci- 

 minibus omnibus visis epidermide denudata, anfractibus ad 4^, 

 ([uorum apicales 2 raagni, vitrei, globulares, Isevissimi, ad a{)iceni 

 ipsum planati, caeteris longitudinaliter costulatis, costis percrassis, 

 ])aucis, anfractus ultimi ad 10, undique spiraliter rudiliratis, liris 

 distantibus, paucis, interstitiis sub lente spiraliter striatulis, ad basim 

 concentrice liratis, apertura ovato-quadratula, alba, peristomate tenui, 

 canali brevissime rostrato, columella fere lecta. Alt. 4, diam. 2 mm. 



Ilab.—Gnlt of Oman. Lat. 24° 58' N. ; long. 56° 54' E. ; 156 

 fatboms, shell-sand. 



Tbis minute Trichotrophis occurred in bleached condition only in 

 the dredging just I'ecorded above, in company with T. Townseudi, 

 M. & St. ; this last, however, has been fortunately obtained in 

 otiier localities in good condition. The two are somewbat similar, 

 almost indeed identical in form and lip characters, but differing in 

 the character of the longitudinal ribs, tbose ot the species now before 

 us being much fewer, more incrassate, and rudely formed. It is 

 possible that it may be a local variety of T. Townnendi, but we hardly 

 think this will prove to be the case. It has not yet been found to 

 occur in any other of tbe recorded localities for the earlier described 

 species.^ 



LiPPisTES TROPiEUM, n.sp. PL XII, Fig. 6. 



L. testa parva, anguste uml)ilicata, ovato-fusiformi, delicata, alba, 

 vel pallide straminea, anfractibus 6A^, (juorum 2A apicales, uitidi, 



1 Proc. Zool. See. Lond., June, 1901, p. 360, pi. xxii, fig. 7. 



