EXPLANATION OF PLATES. 393 



Sancara, Bergh. 

 Distr. — 2 sp. Mediterranean, Japan. 



Mantle smooth, not distinctly separated from the body anter- 

 iorly ; no caruncula tentacularis. 



Cam A RCA, Bergh. 

 Distr. — 1 sp. Realejo, Central America. 



Caruncula tentacularis low, united with the front of the mantle ; 

 this latter without urticating organs. 



Subfamily PLEUROLEURIN^. 



Without gills. 



Pleuroleura, Bergh. 



Distr. — P. omata, Bergh. Philippines. 



Near Pleurophyllidia,but wanting the gills; tentacular shield 

 without caruncles ; back broad, its lateral edge with numerous 

 urticatory pores ; jaws like those of Pleui'ophyllidia, but without 

 masticatory process, and with a smooth edge. 



EXPLANATION OF PLATES; VOL. IL 



Plate 23. 



FIGURE. PAGE. 



1. Octopus octopodia, Linn., . . . . . .15 



2, 3. Beaks of Octopus, ....... 15 



4. Sucker from the arm of Octopus, . . . .15 



5. Octopus Cuvieri, d'Orb., Mediterranean, . . .15 



6. Cistopus Indicus ; distal view of portions of arms, web 



and pores. Indian Ocean, . . . . , .20 



7. Cirroteuthis Mulleri, Esch. Grreenland, . . .21 



8. Tremoctopus violaceus, Chiaje. Mediterranean Sea, . 22 



9. Parasira catenulata, Fer. Mediterranean Sea, . . 22 



10. Tritaxeopus cornutus, Owen. Australia, . . .21 



Plate 24. 



11. Eledone Aldrovandi, Chiaje. Mediterranean Sea, . 20 



12. Pinnoctopus cordiformis, d'Orb. New Zealand, . .20 



13. AUoposus mollis, Yerrill. Atl. Coast United States, . 20 



14. Calliteuthis re versa, Yerrill. New England, . . 30 



15. 16. Mastigoteuthis Agassizii, Verrill. New England, . 39 



17. Plectoteuthis grandis, Owen. Portion of arm, . . 39 



18. Argonauta Argo, Linn. Tropical Seas, . . .22 



19. Argonauta nodosa, Solander. Tropical Pacific, . . 22 



26 



