I'ECTEN. 295 



of Sowerby (Thesaur. Concli. vol. i. p. 57, pi. 13, f. 40) 

 is very closely allied to this species. 



The animal has a fawn-coloured mantle marked with 

 patches and lines of orange and black ; the edges nearest 

 the shell are furnished with white or pale-yellowish cirrhi, 

 rather thick and long in proportion to the size of the 

 species. The ocelli are large, distant, and comparatively 

 few, pearly and ringed with jet. The body and foot 

 are of a brilliant orange, and the branchial leaflets are 

 lineated with black. It is a very active and irritable 

 creature jumping and swimming about in confinement 

 with great vivacity. All its activity is needed to enable 

 it to escape from its enemies, since haddocks greedily 

 devour it. 



This pretty little Pecten was first observed by Laskey, 

 who took it in the Frith of Forth. A slight variety taken 

 by Turton attached to a Serpula tuhularla in Torbay, 

 was named by that author P. tmnidus. It has since been 

 found in many localities, usually in deep water ; Penzance, 

 alive in twenty fathoms, and Plymouth in twenty-five 

 fathoms (M'Andrew and E. F.). Isle of Man, moored 

 to corallines in twenty-five fathoms (E. F.). Taken from 

 the roots of corallines on the Northumberland and Dur- 

 ham coasts (A. Hancock). In twenty-five fathoms, stony 

 ground. Coquet and northwards to sixty fathoms off 

 Trouphead, where they are numerous and free (Thomas). 

 In numerous localities among the Hebrides, in from 

 eighteen to fifty fathoms water, also in Zetland (M'Andrew 

 and E. F.). Off Lerwick in forty fathoms ; at Ullapool 

 off Skye, and in Loch Fyne (Jeffreys). In four fathoms, 

 Shapinsha, moored to corallina, among thousands of Rissose, 

 and in two fathoms, Stromness, moored to D. acideata 

 (Thomas ; who observes that they can quit their moor- 



