EXPLANATION OF THE PLATES. 
PLATE XIII. 
Figure 1.—Architeuthis Harveyi (No. 5). Head and arms, } natural size, from a photo- 
graph of the specimen when freshly caught. The back of the head rests upon an 
oar so as to cause the beak to protrude, while the arms hang down in a reversed 
position. The diameter of the bathing tub was 38-5 inches: a, left, and a right 
ventral arms; @, left, and 6’ right arms of the third pair; c, left, and c’, right 
arms of the second pair; d’, right dorsal arm, mostly concealed behind the others ; 
e, left and e’, right tentacular-arms, folded several times over the oar; 7 to 7, the 
‘club’; 7 to di, the ‘wrist’; 7 to ii, the part bearing large suckers; iii to 7, the 
terminal division; 0, the beak. 
Figure 2.—Part of the body and caudal fin of the same specimen, } natural size, from 
a photograph made at the same time with the preceding; w, mantle cut open; 
t, tip of tail; b, right and /, left lateral lobes of caudal fin. 
PLATE XIV. 
Figure 1.—Architeuthis Harveyi. A restoration, 31; natural size, based on the preced- 
ing figures and on the specimens received. (See note, p. 184). 
PLATE XV. 
Figure 1.—Architeuthis Harveyi (No. 5). Upper mandible, natural size. 
Figure 2.—Lower mandible of same, natural size; lacks a small piece at a. 
Figure 3.—Anterior part of the ‘pen’ of the same specimen, > natural size. The 
dotted lines indicate missing parts. (Restored and drawn by the author). 
Figures 1 and 2 were drawn by Mr. J. H. Blake, from alcoholic specimens. 
Prats XVI. 
Figure 1.—A. Harveyi (No. 5). Portion of the lining membrane of the palate, 
enlarged. 
Figure 2.—A. Harveyi (No.5). Caudal fin, +4; natural size, drawn from the preserved 
specimen. 
Figure 3.—A. Harveyi (No. 5). Suckers of tentacular-arm, natural size ; a, one of the 
largest suckers; b, one of the marginal suckers. 
Figure 4.—The same. Horny marginal ring of one of the suckers from a sessile arm, 
enlarged 2 diameters. 
Figure 5.—A. Harveyi (No. 4). One of the larger suckers from the tentacular-arms, 
natural size. From a dried specimen. 
Figure 6.—Portion of the marginal ring of the same sucker, enlarged. 
Figure 7.—Loligo pallida V. Part of odontophore, much enlarged. 
Figure 8.—Architeuthis Hartingii V. Part of odontophore, enlarged. Copied from 
Harting’s figures. 
Figures 5 and 6 were drawn by J. H. Emerton; the rest by the author. 
