232 PYRAMIDELLIDiE. 



lappets, homologous Mith the winged processes of tlie 

 sides of the opercnhgerous lobes in liissoa. The opercu- 

 lum is horny, yellow, unsymmetrically pyriform, and 

 marked by lines of growth. 



There are two varieties of this animal ; the one usually 

 regarded as the typical, E. pollia, has bright golden yellow 

 tentacles ; the spaces around the eyes are colourless ; the 

 crown of the head is tinged with yellow ; the bilobed 

 mentum is bordered with a conspicuous line of golden 

 yellow ; the rest of the animal is white. The other 

 (nitida of British collectors) has the entire animal white, 

 except a pink space surrounding the eyes. We have 

 figured both varieties, but confess ourselves unable to dis- 

 tinguish between their shells. 



This beautiful shell is sparingly distributed in from seven 

 to fifty fathoms, on a sandy bottom, along the southern 

 and western coasts of Britain, and all round Ireland. It 

 is found also on the east coast of Scotland. It appears 

 to be most abundant on the south coast of Ireland, but is 

 also sufficiently common in some of its Scottish localities. 

 In twenty- five fathoms ofl:' the Coquet (Thomas). Scar- 

 borough (Bean). 



It ranges fi'om Norway to the Mediterranean, and oc- 

 curs fossil in both coralline and red crags. 



E. DisTORTA, Deshayes. 



Small, pure white, usually distorted and compressed, otherwise 

 very slender ; spire more or less curved ; edge of outer lip greatly 

 arched. 



Plate XCII. fig. 4, 5, 6, and (Animal) Plate K K. fig. 4. 



ireliTpoUla^fry, Mont. Tost. P.rit. p. .3.08 ? 



Melania distorla, PiilLirPl, Moll. Sicil. vol. i. p. 158, pi. 9, 1'. 10. 



