255 



Plate XVI«. 



Figure 1. — Architenthis Harreyi V. (No. 5). Teeth of the odontophore, from the 



anterior portion, enlarged 18 diameters; a, median; &, inner lateral; c, and d, 



the two outer lateral teeth ; e, marginal plates. 

 Figure 2. — The same. Teeth from the same specimen, from farther back, on the 



dorsal portion of the odontophore. Lettering as in figure 1. 

 Figure 3. — The same. Anterior portion of odontophore. showing the teeth nearly in 



their natural positions, enlarged. 

 Figure 4. — The same. Portion of the membrane lining the palate, showing teeth and 



hard granules, enlarged. 

 Figure 5. — The same. Two of the granules from the membrane lining the mouth, 



enlarged 18 diameters. 

 Figures 6 and 6". — The same. One of the largest and least oblique of the horny 



rings from the suckers of the sessile arms; top and side-views, enlarged H 



diameters. 

 Figures 7 and 7». — The same. One of the medium sized, and more oblique suckers 



of the sessile arms ; top and side-views, enlarged 1^ diameters. 

 Figure 8. — The same. Another similar sucker, but smaller and more oblique ; top- 

 view, enlarged 1^ diameters. 

 Figures 9 and 9rt. — The same. One of the horny rings from one of the smooth-rimmed 



suckers on the 'wrist' of the 'club ' of the tentacular-arms; top and side-views, 



enlarged 3 diameters. 

 Figures 10 and 10a. — The same. One of the small suckers from the terminal portion 



of the 'club,' top and side-views, enlarged 3 diameters. 

 Figures 1 to 5, and 8, are camera-drawings by the author. The others are by J. H. 



Emerton. 



Plate XVII. 

 Figures 1 and 1*. — Architeuthis princeps Verrill (No. 14). A marginal ring from one 



of the large suckers of the tentacular-arm ; 1, side-view, enlarged 1^ diameters ; 



1", portion of the rim, enlarged 3 diameters. 

 Figures 2 and 2*. — The same. One of the medium-sized oblique sucker-rims from a 



sessile arm, enlarged li diameters ; top and side-views. 

 Figures 3 and 4. — The same. Top and side-views of one of the smaller sucker-rims 



from a sessUe arm, enlarged 3 diameters. 

 Figures 5 and 6. — The same. Top and side-views of a complete sucker, with its 



pedicel, from a sessile arm, enlarged li diameters. 

 Figure 7. — The same. Top-view of one of the smaller, very obhque sucker-rims 



from a sessile arm, enlarged 3 diameters. 

 Figure 8. — The same. Portion of the horny rim of a medium-sized sucker from a 



sessile arm ; top-view, enlarged 6 diameters, from a camera-drawing. 

 Figure 9. — The same. Side-view of the horny ring of one of the largest and least 



oblique of the suckers of the sessile arms, enlarged 1| diameters. 

 Figure 10.— The same. Side-view of the horny ring of one of the marginal suckers 



of the tentacular-club, enlarged 3 diameters. 

 Figure 11. — A. princeps (No. 13). Portions of the horny ring of one of the large 



suckers of the tentacular-arm, much enlarged ; a and b, portions of the margin, 



from the outside ; c, portion seen from the inside. 

 Figures 8 and 11 are camera-drawings by the author; all the others are by J. H. 



Emerton. 



