MOLLUSCA. 7") 



Class GASTEROPODA. 



Order I. Cyclobranchiata. 



Fam. Chitonidae, Guilding. 



Genus Chiton, L. 



Chiton fascicularis, L. Jeffreys, Brit. Moll. iii. p. 21 1 . 

 v. pi. 55. f. 3. 



Abundant under stones between tide-marks. This species, 

 like the limpet, forms considerable cavities in sandstone, so 

 that specimens become almost immersed. 



Chiton cinereus, L. Op. cit. iii. p. 218, v. pi. 55. f. 2. 



Common in deep water, and in the stomachs of the cod, 

 haddock, and flounder. 



Chiton marginatus, Pennant. Op. cit. iii. p. 221, v. pi. 56. f. ■'>. 

 Frequent under stones between tide-marks. 



Chiton ruber, Lowe. Op. cit. iii. p. 224, v. pi. 56. f. 4. 

 Occasionally between tide-marks at the East Rocks. 



(Chiton hivis (Pennant), Mont. Op. cit. iii. p. 226, v. pi. 56. f. 6. 

 Under stones at the verge of extreme low water during 

 spring tides. Rare ; but the examples are large. 



Order II. Pectinibranchiata. 

 Fam. 1. Patellidae, Guilding. 

 Genus 1. Patella, Lister. 



Patella vulgata, L., and var. depressa. Op. cit. iii. p. '2'M\, 



v. pi. 57. 



Common everywhere; occasionally eaten. The soft shale, 

 and sandstone are extensively pitted by this form. 



l2 



