170 PEOF. OWEN ON NEW AND EAEE CEPHALOPODA. 



PLATE XXXI. 



EnopJoteuthis cooJdi, 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 XXXII. 



Enoploteuthis cooMi. 



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. iSection 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 oi EnoploteutMs cooJdi. 



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



PLATE XXXIV. 



Plectoteutliis 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. 



Plectoteutliis 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.) 



