68 CATALOGUE OF THE MOLLUSOA 



below low-water mark. The plain variety only is found on this 

 coast, which is the C. arctica of Montagu in the " Testacea Britan- 

 nica." He afterwards united it with C. Europoea in the Sup- 

 plement. 



Family. Naticid^, Gray. 

 64. NATICA, Adanson. 



1. N. CATENA, La Costa. 



Nerita glaucina, Mont. Test. Brit. 469. 



Natica monilifera, Lam. Anim. s. Vert. 2nd Ed. viii. 638. 

 On sandy shores, not common. Embleton Bay, rare. — Mr. R. 

 Emhleton. Seaton Carew. — Mr. W. Backhouse. Whitburn. — 

 Bev. G. C. Abbes. 



2. N. Alderi, Forbes. 



Nerita glaucina, var. B., Turt. Conch. Diet. 125. 

 Natica Alderi, Forbes Mai. Monen. 31, t. 2, f. 6, 7. Thorpe 

 Brit. Mar. Conch. 148, f. 82. 

 From the coralline zone, common. Frequently met with in 

 the stomachs of haddocks. 



We have seldom, if ever, observed this species cast on shore. 

 It seems to live in deepish water on our coast, though on the 

 westeiai coast of Scotland near Ardrossan it inhabits the sand 

 near low water mark, and is thrown up plentifully on the beach 

 along with N. catena. We have observed that several other mol- 

 lusks inhabit shallower water on the western coast of Great 

 Britain than they do with us. 



The Rev. G. C. Abbes and Mr. R. Howse have met with the 

 plain variety at Whitburn. 



3. N. INTRICATA, Don. 



Nerita intricata, Don. Brit. Shells, t. 169. 

 From the fishing boats, Cullercoats. — J. H. F. 



4. N. MoNTAGUi, Forbes. 



Nerita rufa, Mont. Test. Brit. Supp.l50,t.30,f.3? (excl.var.) 

 Natica Montagui, Forbes Mai. Monen. 32, t. 2, f. 3-5. 

 From the coralline and deep-water zones, rather rare, occa 

 sionally met with in the fishing boats at Cullercoats and Whit- 

 burn. Mr. Howse dredged several living specimens in seventeen 



