170 PEOF. OWEN ON NEW AND BAKE CEPHALOPODA. 



PLATE XXXI. 

 Enoploteutltis cookii, Ow. 



Fig. 1. Vertical longitudinal section of mouth, natural size. 

 Fig. 2. Ventral surface of pinnigerous termination of body. 

 Fig. 3. Dorsal surface of pinnigerous termination of body. 

 Fig. 4. Section of pinnigerous termination of body. 

 (Figs. 2-4 much reduced.) 



PLATE XXXn. 



Enoploteuthis coo/iii. 



Fig. 1. Terminal portion of a cephalic arm, natural size. 

 Fig. 2. Cut end of ditto. 

 • Fig. 3. Section of basal part of ditto. 

 Fig. 4. Section of uncigerous acetabulum. 

 Fig. 4'. Outline of ditto, magnified. 

 Fig. 5. Section of uncigerous acetabulum. 

 Fig. 5'. Outline of ditto, magnified. 

 Fig. 6. Section of systemic ventricle, natural size. 



PLATE XXXIII. 



Fig. 1. Restoration o{ Enoploteuthis cookii. 



Fig. 2. Tentacle oi Architeuthis princeps, less than natural size. 



PLATE XXXIV. 



Plectoteuthis grandis. 



Fig. 1. Dorsal surface of cephalic arm and vela, from a section near the base. 

 Fig. 2. Acetabuliferous surface of termination of the arm. 



(Natural size.) 



PLATE XXXV. 



Plectoteuthis grandis. 



Fig. 1. Transverse section of non-acetabuliferous base of cephalic arm. 

 •' Fig. 2. Acetabuliferous surface and vela of basal part of the arm. 

 ^■' Fig. 3. Side view of a basal acetabulum. 



(Natural size.) 



