166 CATALOGUE OF THE MOLLUSCA 
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. petiuctpa, 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. travis, 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 itis. Professor Lovén 
remarks that this is not found along with P. pellucida on the 
Scandinavian shores. 
71. LOTTIA, Gray. 
1. L. virarnea, JZull. 
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 isso evidently one 
of the Patellide, that we should do much greater violence to the 
natural affinities by removing it to another order. We cannot, 
however, agree with Professor Lovén in considering it merely a 
section of the genus Patella. 
Famity. Currontpm, D’Orbigny. 
72. CHITON, Linneus. 
1. C. FascrcuLaRis, Linn. 
Chiton fascicularis, Mont. Test. Brit. 5. 
Under stones near low-water mark, not uncommon. 
2. C. Hanusyi, Bean. 
Chiton Hanley, Bean in Thorpe’s Brit. Mar. Conch. 263, f. 57. 
