MANUAL OF THE MOLLUSCA. 



EXPLANATION OF THE PLATES. 



The principal specimens figured were kindly communicated by Mrs. 

 J. E. Gray, Mr. Hugh Cuming, Major W. E. Baker, Mr. Laidlay of Cal- 

 cutta, Mr. Pickering, Sir Chas. Lyell, Mr. Sylvanus Hanley, Mr. James 

 Tennant, and Mr. Lovell Reeve. 



The fractions shew the number of times (or diameters) the figures are 

 reduced, or magnified, 



PLATE I. 



Octopodid*. PAGE 



1. Octopus tuberculatus, Bl. 3-. Mediterranean 67 



2. (mandibles] t 62 



3. Tremoctopus violaceus, $. Chiaje. Messina 65,68 



Teuthida. 



4. Sepiola oceanica, Orb. Atlantic , 71 



6. Loligo vulgaris, Lam. (gladius). . Britain 69 



7- Onychoteuthis Bartlingii, Le Sueur. \. Indian Ocean 72 



8.- -(gladius). 72 



Sepiadee, 



5. Sepia officinalis, L. . Britain 76 



9. Spirula Isevis, Gray. . New Zealand 77 



