254 



angle running far up the fpire ; the lower one formed by 

 the tail or canal ; thcfe are more or lefs channelled be- 

 neath : flefh-colour. Length near two inches. 



This fliell is fubjei^ to great variety with refpefl to the 

 outer lip, which increafes by age: young (hells have all 

 the appearance of a Murex, without the lead expanfion 

 of the lip. and all gradations are to be met with from that 

 to the perfett fhell. 



Da Costa fpeaks of this fpecies as pretty general on 

 many parts of the Englijli, Welch, and iiCOttiJJi coafls. 



We have found it not uncommon at the mouth of the 

 Ex, on Dnwlijli Warren in Devo-njliire, but rarely perfecl, 

 except after violent Ilorms. 



Live (hells are fometimes obtained at Torcrofs by deep 

 dredging; but more frequently old and worn fpecimens 

 which are invariably inhabited by a new and fingular fpe- 

 cies o^ Sipunculus, who clofes up the aperture with agglu- 

 tinated (and, leaving only a fmall round hole, within which 

 it recedes. This animal is capable of withdrawing its an- 

 terior part within the other, in the fame manner that the 

 corr mon Limax draws in the larger tentacula, to which 

 the eyes are alhxed; it has no other mode of contracting 

 or expanding. 



The animal of the 5. pes. Pelecani has a long fnout, 

 and two filiform tentacula of a pink colour : the former 



fpotted 



