72 CATALOaUE OF THE M0LLU3CA 



southern coast, too, there is frequently an intermediate form be- 

 tween this and the last, which looks very like a hybrid, but with 

 us they keep constantly distinct. The fishermen recognise the 

 difference between them, and call this the horse-limpet, rejecting 

 it as too tough for bait. 



3. P. PELLUciDA, Linn. (Blue -rayed Limpet.) 



Patella pellucida, Mont. Test. Brit. 477. 

 On the fronds of Laminaria digitata at and beyond low-water 

 mark, common. 



4. P. L^vis, Penn. 



Patella coerulea, Mont. Test. Brit. Supp. 152. 



At the roots, and occasionally on the stems, of Laminaria 

 digitata, common. 



Great difference of opinion has always existed as to whether 

 or not this is a distinct species from the last. As far as our ob- 

 servations go, we are inclined to think it is. Professor Lov6n 

 remarks that this is not found along with P. pellucida on the 

 Scandinavian shores. 



71. LOTTIA, Graij. 

 1. L. VIEGINEA, Miill. 



Patella parva, Mont. Test. Brit. 480. 



Under stones and on rocks, near low-water mark, frequent. 



We are aware that we do some violence to an artificial ar- 

 rangement by placing this species here, but it is so evidently one 

 of the Patellidce, that we should do much greater violence to the 

 natural affinities by removing it to another order. We cannot, 

 however, agree with Professor Loven in considering it merely a 

 section of the genus Patella. 



Family. Chitonid^, UOrhigny. 

 72. CHITON, Linnceus. 



1. C. FAScicuLARis, Linn. 



Chiton fascicularis, Mont. Test. Brit. 5. 

 Under stones near low-water mark, not uncommon. 



2. C, Hanleyi, Pean. 



Chiton Hanleyi, Bean in Thorpe's Brit. Mar. Conch. 263, f. 57. 



