150 
M. SASAKI. 
Explanation of Plate IV. 
Onnitastrcphcs volatilis sp. nov. 
Fig'. I. Dorsal view of male, x 1/2. 
Fig" 2. I^aterai aspect of the same, x i /2. 
Fig. 3. Camera drawing of horny rings from third left arm, x 30. a) 
From sucker of sixth row from base of arm; b) from sucker of tenth row; 
c) from sucker of fifteenth row. 
Fig. 4. Hecotocotylus, x i /2. a) Inner aspect ; b) lateral aspect 
showing sculpture. 
Fig. 5. Camera drawings of oblique-lateral view of horny ring from 
largest tentacular sucker, x 13. 
Fig. 6. Ventral aspect of gladius, x 1/2. 
Symplectoteiiiliis Inminosa sp. no\'. 
Fi g. 7. Ventral view of male, x 1/2. 
Fig. 8. Lateral aspect of head of female, x 1/2. 
Fig. g. Camera drawings of horny rings from second left arm, x 30. 
a) From sucker of sixth row from base of arm ; b) from sucker of tenth row. 
Fig. 10. Inner aspect of hectocotylus, x 5/4. 
Fig. II. Camera drawings of horny rings from tentacle, x 30. a) 
From largest sucker in inner row; b) from marginal sucker in hand portion. 
Fig. 12. Ventral aspect of body of male showing luminous organs 
after flaying, x i /2. 
Fig. 13. Ventral aspect of gladius, x 1/2. 
