PATELLA. 429 



noticed on the southern coast an intermediate form between 

 this and vulgata, which looks very like a hybrid: "the 

 fishermen recognise the difference between them, and call 

 this the Horse-limpet, rejecting it as too tough for bait." 

 This rejection of the animal as bait seems general ; in the 

 little island of Herm, near Guernsey, the two species are 

 never found mixed ; and poultry, which are there fed upon 

 Limpets, turn from the athletica, whilst they greedily 

 devour the common kind (S. H.). Dr. Johnston, in his in- 

 teresting account of the Berwickshire Limpets, says that 

 the fishermen distinguish these as " Yawds" and that they 

 " have a tough leathery foot of a cream-yellow colour, and 

 tentacula of the same colour, but a shade lighter. They 

 are found near low-water-mark, and are said to be less 

 common than the other varieties. They are almost worth- 

 less as baits." Lieut. Thomas informs us that the fishermen 

 in the Orkneys make a distinction between the Limpets 

 near high- and those near low- water-mark, and say that the 

 fish will hardly take the first, when they will freely bite at 

 the latter, which, if the low-water form be the species 

 before us, is contrary to the usual observation. 



P. pellucida, Linnreus. 



Not ribbed, smooth or nearly so, usually with radiating linear 

 markings of blue or bluish green : margin quite entire. 



Plate LXI. fig. 3, 4, and (Animal) Plate A. A., fig. 1. 



Lister, Hist. Conch, pi. 542, f. 2G, 27. 

 Patella pellucida, Linn. Syst. Nat. cd. 12, p. 1260. — Pbnn. Brit. Zool. ed. 4, 

 vol. iv. ji. 143, pi. 90, f. 150. — Pulteney, Hutchins, Hist. 

 Dorset, p. 51.— DoNOV. Brit. Shells, vol. i. pi. 3, f. J — 

 Mont. Test. Brit. vol. ii. p. 477. — Maton and Hack. 

 Trans. Linn. Soc. vol. viii. p. 233. — Rack. Dorset Catalog. 

 p. 58, pi. 23, f. 5. — Ti'RT. Conch. Diction, p. 137.— 

 Fleming, Brit. Anhn. p. 286. — Johnston, Berwick. Club. 



