168 PROCEEDINGS OF THE MALACOLOGICAX SOCIETT. 



name of Mr. B. R. Lucas, who first found it, with some other interesting 

 forms, in shell-sand from the station given above. 



AcTiEON PPLCHRIOR, n.sp. PI. X, Fig. 26. 



M. testa rotundo-ovata, vel oblonga, dolioliformi, tenui, delicata, 

 albo-lactea, vel pallide fusca, subcrystallina, anfractibus 5, apice 

 obtuso, globulari, apud suturas compressis, ventricosulis, undique 

 arete spiraliter sulcatis, sub lente forti longitudinaliter tenuissime et 

 oblique striatulis, apertura ovata, labro tenui, columella paullum 

 incrassata, nitida, vix plicata. Long. 3'50, lat. l'75mm. 



Mab. — Persian Gulf, off Bahrein, 6 fathoms, coral sand. 



Yariable in form, one specimen being almost round, the majority, 

 however, are oblong, tun-shaped, with remarkably blunt, vitreous, 

 globular apex, the substance subpellucent, milky-white, or suffused 

 with fuscous, whorls five, closely spirally furrowed, and microscopically 

 longitudinally obliquely striolate. The very narrow umbilicus is 

 half concealed by the columellar margin ; it is but slightly plaited. 

 Several examples. Allied to Actaoti auntrinus, Watson,^ from Culebra 

 Island, south West Indies, at 390 fathoms. 



Retusa bysma,^ n.sp. PI. X, Fig. 27. 



R. testa parva, conico cylindrica, alba, supra truncatula, longi- 

 tudinaliter arctissime sulcata, versus apicem sulcis minus conspicuis, 

 lineis scalptis spiraliter superficiem totam circumcingentibus, anfr. 

 3-4, apertura oblonga, versus basin cochleariformi, labro tenui, fere 

 recto, columella paullum oblique convexa. Alt. 4, diam. 2 mm. 



Utriciilus famelicus, Watson, seems the nearest ally to this little 

 species, which is basally broader in proportion, that being a most 

 attenuate shell. The longitudinal lines of growth and deeply seated 

 crown are similar in both. 



Ctlichna pithiscus,^ n.sp. PI. X, Fig. 28, 



C. testa parva, ovata, compressa, alba, nitida, undique spiraliter 

 arete tenuiter striatula, apertura oblonga, supra angustiore, infra 

 paululum effusa, labro tenui, columella versus basim etfusa, simplice. 

 Alt. 2-75, diam. 1-30 mm. 



A good many examples of a small, white little species, slightly 

 compressed laterally, oval in form, regularly spirally very minutely 

 striolate, there being no pitting or delicate punctuation, as exists in 

 the nearly allied C. crenilabris, M. & S.,* from the same locality, but 

 irregular longitudinal striae cross the spiral lines. 



1 Rep. Challenger Exped., vol. xv, p. 628, \A. xlvii, fig. 2. 



2 Puir/xa, a bung, or cork, from the form. 

 ' indicTKos, a small barrel. 



* Proc. Zool. See, 1901, pt. ii, p. 455. 



