Pxiij of Bengnl and the Arahian Sea. IT)!) 



Hah. Station 2f)0, W. of Ca|)0 (.'omoriii, 487 tath., green 

 mud and sand ; Slation 3.'}8, (jiill" oi" Manar, 401 lath. 



The specimens i'rom Station 260 are Tnnch larger than any 

 examples uhich I have seen from Japan, the original locality 

 of this species. The largest is 80 mm. long and 37 broad. 



Like the specimens mentioned at the above rcFerence all 

 tliose in the present scries have the top of the spire eroded. 

 The operculum is narrow, 17 mm. in length, and has the 

 right margin serrated. 



Pontiothauma? ahyss'icola, Smith. 



Pontiothaiima ahi/ssicola, Smith, Ann. & Mag. Xat. Hist. 189-^, vol. .\vi" 

 p. 2, pi. i. fifr. ^ ; Illiist. Zool. ' Investigator,' MoUusca, pi. v 

 tigs. 2, 2 a (onlarged j ; Pace, Journ. Linn. Soc, Zool. vol. x.vviii* 

 p. 459, pi. xlii. figs. 10-14 (anatomy), 



Hab. Station 268, S.E. of Cape Comorin, 556-595 fath., 

 green mud and sand. 



According to Mr, Pace this species should be removed 

 from Puntiothuuma. although in many respects it closely 

 agrees with that genus. 



Pontiothauma minus, sp. n. 



Testa ovato-fusiformis, alba; aufractus 8?, superiores detriti, cseteri 

 supra coneavi, infra convexiustuli et costati, costis subangulatis, 

 spiraliter tenuiter lirati lineisque incrementi tenuibus striati, 

 ultimus costis infra medium evanidis, antice contractus ; apertura 

 alba, longit. totius j jequans ; labrum tenue, supra vix sinuatum ; 

 columella Igevis, callo albo circumscripto induta ; canalis anterior 

 latus, brevis, subrecurvus. 



Longit. 30 mm., diam. 14 ; apertura cum canali 15 longa, 5 lata. 



Hab. Station 318, off W. of Ceylon, 1085 fath. 



Another specimen, in worn condition, is rather larger than 

 the type, being 39 mm. in length. The costse in this species 

 are about eighteen in number, somewhat acute, and do not 

 reach to the suture above, but terminate at the depression at 

 the upper part of the whorls. The transverse lira are fine, 

 contiguous, and continuous over and between the costse. 

 Animal without eyes or operculum, and the foot is much 

 flattened behind. 



Pontiothauma Pacei, sp. n. 



Testa late fusiformis, alba ; anfractus 10 ?, superiores detriti, caeteri 

 supra concave declives, in medio leviter angulati, oblique cosfati, 

 spiraliter tenuiter lirati lineisque incrementi flexuosis sculpti, 

 ultimus paulo inflatus, antice angustatus ; apertura cum canali 



12* 



