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 Charles Lyell, Mr. Sylvanus Hanley, Prof. 
James Tennant, and Mr. Lovell Reeve. 
The fractions show the number of times (or diameters) the figures 
are reduced, or magnified. 
CO MT OD 1h 
PLATE I. 
Octopodide. 
> Page 
. Octopus tuberculatus, Bl 4. Mediterranean ..........,... 163 
GHAMAULES) Gere ciclas. «aco ¢, «1s ole ee diene eels» en ieee 156 
. Tremoctopus violaceus, ¢. Chiaje. Messina .......... 159, 164 
Teuthide. 
. pepiola Atlantica, Orb. Atlantic... ..e. sc. scee ce oe 169 
. Loligo vulgaris, Lam. (gladivs). 4. Britain................ 167 
. Onychoteuthis Bartlingii, Le Sueur. 4}. Indian Ocean...... 171 
S(GIGMUUS). Fe vias debs ss oe gles os see 171 
Sepiade. 
; Sepia officinalis, L. 1. Britain ....2.2......+ -7- eee ooh 
Spirulide. 
. Spirula levis, Gray. §. New Zealand .............se0eeee 178 
