NATICA. 341 



specimen (in Mr. Leckenby's Collection) has been found at 

 Searborougli. Dr. Knapp has taken several from had- 

 docks*' stomachs caught off the Frith of Forth. Professor 

 MacGillivray has found it at Aberdeen. Lieut. Thomas 

 has taken it in fifteen fathoms, Eda Sound ; in seven fathoms, 

 Sanda Sound ; and in forty fathoms on the east coast of 

 Orkney ; in all instances on a coral (nullipore) or shelly 

 ground, never alive, but evidently quite recent. Mr. 

 Jeffreys and Mr. Barlee have dredged it in the Zetland 

 seas, where it has been once taken by Mr. MacAndrew in 

 forty-five fathoms. 



It is a boreal and arctic species, and ranges to the coasts 

 of North America. As a fossil it is plentiful in the red 

 crag, and in the mammaliferous crag of Bramerton (Lyell, 

 Searles Wood). 



N. pusiLLA, (Say?) Gould. 



Small, white, covered Avith a yellowish ash-coloured epidermis ; 

 spire blunt, very short ; whorls not scalar : umbilicus a mere 

 chink. 



Plate C. fig. 7. 



Natica pusilla. Say, Journ. Acad. N. S. Philadelph. vol. ii. p. 257? — Gould 



(1841), Invert. Massach. p. 237, f. 166. — Philippi, Neue 



Conch, vol. ii. p. 44, Nat. pi. 2, f. 9. — Dekay, New York 



Fauna, Moll. p. 123, pi. 7, f. 45. 



„ Groenlandica, Beck (1842) in Moi.ler, Index Moll. Groenl. p. 7 (from 



type). — Hanl. Brit. Marine Conch, p. xxxiv. fig. 55.— 



King, Annals Nat. Hist. vol. xviii. p. 243 Alder, 



Moll. Northumb. and Durh. p. 69. — Searles Wood, 

 Crag Mollusc, vol. i. p. 146, pi. 12, f. 5. 

 „ livida. Bean, Brit. Marine Conch, p. 265. 

 „ alfja, " LoVEN," Philippi, Neue Conch, vol. i. p. 17, Nat. pi. 1, f. 13. 



We are not quite certain that this is the species that 

 Say intended by his Natica pusilla ; it is assuredly, how- 

 ever, the shell identified as such by Dr. Gould. 



