of British Mollusca. -J57 



1870. Jeffreys. " Norwegian Mollusca." Ann. & Mag. Nat. 

 Hist. ser. 4, vol. v. p. 438. 



1870. . " Mediterranean Mollusca." Ibid. vol. vi. pp. 65, 457. 



1872. . " Mollusca of Europe compared with those of 



Eastern North America." Ibid. vol. x. p. 237. 



1873. . Mollusca in Wyville-Thomson's 'Depths of the Sea.' 



1874. . " Some Remarks on the Mollusca of the Mediter- 

 ranean." lleport Brit. Assoc, for 1873, p. 111. 



1876. . " Preliminary Report Biological Results of Cruise of 



H.M.S. 'Valorous' to Davis Strait." Proc. Roy. Soc. 

 p. 177. 



1877. . " Post-Tertiary Fossils and some recent Mollusca of 



Arctic Expedition." Ann. & Mag. Nat. Hist. ser. 4, 

 vol. xx. p. 229. 



1877. . Address Biological Section British Association. Re- 

 port Brit. Assoc. 1877. 



1876-77. . Papers on the "Mollusca of the 'Valorous' 



Expedition." Ann. & Mag. Nat. Hist. ser. 4, vols, xviii. 

 and xix. 



1878-85. . " Mollusca procured during the 'Lightning' and 



' Porcupine' Expeditions." Proc. Zool. Soc. 1878-85. 



1880. . " Deep-sea Mollusca of the Bay of Biscay." Ann. & 



Mag. Nat. Hist. ser. 5, vol vi. (Two papers.) 



18S2. . " Mollusca of Italian Exploration of the Mediterra- 

 nean." Ibid. vol. viii. p. 389. 



1883. . " Mediterranean Mollusca." Ibid. vol. xi. p. 393. 



1882. . Mollusca in Murray's (John) " Exploration of Faroe 



Channel, 1880, in 'Knight Errant.'" Proc. Roy. Soc. 

 Ediub. vol. xi. 



1 883. . " Mollusca procured during Cruise of H.M.S. ' Triton ' 



between the Hebrides and Faroes." Proc. Zool. Soc. J 883, 

 p. 389. 



18S4. . " Concordance of Mollusca inhabiting both sides of 



the Atlantic." Report Brit. A.ssoc. 1884. 



MOLLUSCA. 

 Class I. CEPHALOPODA. 



The Cephalopoda are divided into two orders, those which 

 have eight arms surrounding the mouth, and are therefore 

 termed Uctopoda, and those which, in addition to these eight 

 arms, have two more of different structure, in which clubs 



