PLATE XXV 



CEPHALOPODA : DIBRANCHIA 



i. Spirula Peronii, Lamk. 



2. Conoteuthis Dupiniana, d'Orb. Fossil: Neocomian. 



3. Belemnitella mucronata, Sby. Fossil : Chalk. 



4. Spirulirostra Bellardii, d'Orb. Fossil : Miocene. 



5. Beloptera belemnitoides , Blainv. Fossil : Eocene. 



6. Belosepia sepioidea, Blainv. Fossil : Eocene. 



7. Sepia officinalis, Linn. The "Bone." 



8. Sepia officinalis, Linn. The whole animal. 



9. Loligo Forbesi, Steenstrup. The "Pen." 

 10. Onychoteuthis Banksii, Fer. 



11. Onychoteuthis Banksii, Fer. The "Pen." 



12. Argonauta hians, Solander. (C/. Plate XXL, Fig. 4. 



13. Polypus tuberculatus, Blainv. 



14. Polypus tuberculatus, Blainv. Hectocotylized arm. 



* * All Figs, from drawings by S. P. Woodward. 



