Bay of Bengal and the Arabian Sea. 367 



the other, which proves to belong to a previously described 

 species, I append the synonymy. 



Pirula investigatoris. 



Sycotypus, sp., Wood-Mason & Alcock, Ann. & Mag. Nat. Hist. 1891, 



vol. vii. pp. 15, 1G (cut, fig. 2). 

 Sycotypus invediyatoris, Wood-Mason & Alcock, MSS. 



Testa ventricose pyriformis, mediocriter tenuis, dilute fuccscens, hie 

 illic longitudinaliter saturatius strigata, undique spiraliter tenuiter 

 lirata, lineis incrementi arcuatis tenuissimis cancellata ; spira 

 aliquanto elata ; anfractus 7, celeriter accrescentes, convexiusculi, 

 supremi 2| (nucleus) keves, ultimus ventricosus, infra medium 

 constrictus ; apertura elongata, longit. totius 1 fere sequans, antice 

 in canalem obliquam latem producta, intus albida, subsulcata ; 

 labrum tenue, in medio arcuatim promiuens, postice ad suturam 

 subsinuatum ; columella spiraliter convoluta, usque ad apicem 

 intus visibilis, callo tenuissimo albo supra suturam producto 

 iuduta. 



Longit. 97 millim., diam. maj. 56, min. 47 ; apertura cum rostro 

 81 longa, in medio 27 lata. 



Ilab. Off Ganjam coast, east coast of India, in 98 to 102 

 fathoms, on a sandy bottom. 



The distinguishing features of this interesting species are 

 its ventricose form, high spire, thin texture, and the smooth- 

 ness of the sculpture. The spiral or transverse riblets are 

 very fine and close together, a little flattened, and generally, 

 but not constantly, alternately more slender. The longitu- 

 dinal raised lines are thread-like, very much curved, and 

 chiefly visible between the riblets. The colour of the shell is 

 light brown or " warm cinnamon," with longitudinal streaks 

 of a darker tint in the same curve as the lines of growth. 

 " Colour of the animal delicate pink, the edges of the mantle 

 shading into a lemon-yellow." 



Solariella infundibulum^ Watson. 



Trochus (M argarita) infundibulum, Watson, Report Gaster. ' Chal- 

 lenger,' p. 84, pi. v. fig. 3. 

 Solariella infundibulum, Pilsbry, Man. Conch, vol. xi. p. 319, pi. Ixvi. 



Trochus infundibulum, Dall, Nautilus, vol. iii. pp. 2-4 (description of 



soft parts). 

 Solariella metallica, Wood-Mason & Alcock, Ann. & Mag. Nat. Hist 



1891, vol. viii. p. 444, figs. 12 a, b. 



Hab. Off Bermuda, 1075 fath. ; off Marion Island, in the 

 Southern Ocean, 1375 fath. (' Challenger'') ; 100 miles east- 



25* 



