2 56 
Plate XVIII. 
Figure 1. — Architeuthis princeps V. (No. 10). Upper jaw, natural size. 
Figure 2. — The same. Lower jaw ; the dotted line shows the parts that are present 
on the opposite side. 
Figure 3. — Architeuthis princeps (No. 1). Part of lower jaw, natural size. 
Figures 1 and 2 were drawn by the author ; figure 3 by J. H. Emerton. 
Plate XIX. 
Figure 1. — Architeuthis princeps Y. (No. 14). Caudal fin from beneath; from the 
specimen a few days after it had been placed in alcohol. 
Figure 2. — The same specimen, after it had been preserved several months in strong 
alcohol. 
Figure 1 was drawn by J. B. Holder, M.D. ; figure 2, by the author. 
Plate XX. 
Architeuthis princeps Y. (No. 14). General figure ; from the recently preserved speci- 
men ; restored, in part, in accordance with the measurements of the freshly 
caught specimen ; xg- natural size. Drawn by the author. 
Plate XXI. 
Figure 1. — Sthenoteuthis megaptera Verrill. Body seen from beneath, $ natural 
size ; from the alcoholic specimen. 
Figure 2. — The same. Part of the membrane lining the palate, enlarged 8 diameters ; 
a, and b , from different places. 
Figure 3. — The same. A single row of teeth from the odontophore, enlarged 8 
diameters. 
Figure 4. — The same. Teeth from the odontophore, enlarged 1 6 diameters ; a , two 
median teeth ; b, inner lateral teeth ; c and d , teeth of the two outer lateral rows. 
Figure 5. — The same. Two of the outer lateral teeth, profile-view, enlarged 16 
diameters. 
Figure 6. — The same. Several lateral teeth in their natural sequence, enlarged 16 
diameters. 
Figure 7. — The same. Two of the next to the outer lateral teeth, enlarged 16 
diameters. 
Figures 8 and 8 a . — The same. Twenty-second sucker from the ventral arm ; front 
and side-views, enlarged 3 diameters. 
Figure 9. — The same. One of the largest suckers from the club of the tentacular- 
arm ; front view, enlarged 3 diameters. 
Figures 8, 8 a and 9 are by J. H. Emerton ; the others by the author ; 2 to 7 are 
camera-drawings. 
Plate XXII. 
Histioteuthis Collin.su Verrill. Side-view of the head and arms; from the preserved 
specimen, \ natural size. Drawn by J. H. Emerton. 
Plate XXIII. 
Figure 1. — Onychoteuthis robusta (Dali). Side-view of one of the specimens, as found 
on the beach, -/g natural size. 
