oj the Fiahevji Board fur Scotland. 317 



It is often taken in the stuniachs of Cod, Haddock, Whiting (rarely), 

 Plaice, Sail-Jtuhe, Long-rough dab, Common dab, and Gurnard, (rarely). I 

 have taken as many as 85 perfect specimens from tiie stomach of one 

 haddock i;}|in. long. 



SPATANGID^. 



Spatangus. 



Spatangus pm'pureufi, 0. F. Miill (Leske). 



1885. Spatangus purpureus, Pearcey, Proc. Roy. Phys. Soc, 



Edinb., vol. viii., p. 404. 

 1892. Spatangus purpureus, Bell, Brit. Mus. Cat., pp. 1G5, 1G6, 



pi. xvi., fig. 10. 

 1892. Spafangiis pitrpureiis, Scott, F.B. for Scot. Report, ^11, 



pt. iii., p. 126. 

 1897. Spatangus purpureus, Pearcey, F.B. for Scot. Rept., 



pt. 16, p. 61. 



I have taken Spatangus purpureus in moderate numbers at seven of 

 the off-shore stations in the Moray Firth, and especially fine specimens on 

 and near Smith Bank. Those taken in the deeper water, 30 to 42 

 fathoms, on a muddy bottom, generally have the minute bivalve mollusc, 

 Montaciita suhstriata, attachecl to their spines. 



Spatangas piirp^ireus is a very rare form in the Cromarty Firth. 



The bathymetrical range of the species extends, in the British seas, from 

 5 to 530 fathoms. Its natural habitat, however, is in depths of from 20 

 to 50 fathoms, on a bottom deposit of sandy mud, where it is often taken 

 in aliundance. 



Spatangas jmrpiireus has been found in the stomachs of Cod, 

 Iladdocl; and Cat-fish. 



ECHINOCARDIUM. 



Ecliinocardixim cordatum, Penn. 



1885. Echinocardium cordatum, Pearcey, Proc. Roy. Phys. Soc, 



Edinb., p. 404, vol. viii. 

 1892. Echinocardium cordattim, Bell, Brit. Mus. Cat., 



pp. 169, 170, pi. xvi., figs. 1-4. 



1896. Echinocardium cordatum, Scott, F.B. for Scot. Rept., pt. 



15, p. 162. 



1897. Echinocardium cordatum, Pearcey, F.B. for Scot. Rept., 



16, pp. 57 to 63. 



Echinocardium cordatiim, the commonest of all the British Heart 

 Urchins, is but sparingly distributed over the off-shore stations of the 

 Moray Firth, its natural habitat being in shallow-water sandy bays 

 along the coast, where it can be taken in great quantity. I have 

 taken it in small numbers at thirteen of the special stations in the Moray 

 Firth, but I have not found it in the Cromarty Firth, where the nature of 

 the bottom deposits is unfavourable to its existence. 



The bathymetrical range of this species extends from the low^ spring 

 tide mark to 75 fathoms, in the British seas, 



Echinocardium cordatum, has been found in the stomachs of Haddock, 

 Cod, Cat-fixh, Whiting, Plaice, and Halibut. 



