LIST OF ILLUSTRATIONS 



656. Sepia, cultrata, cranial cartilage 



657. ,, „ nuchal cartilage 



658. ,, ,, mantle-cavity 



659. ,, officinalis, jaws 



660. ,, section of buccal mass . 



661. ,, officinalis, enteric canal 

 6(i2. ,, cultrata, dissection of male from posterior aspect 



663. ,, ,, lateral dissection of male 



664. ,, officinalis, longitudinal section of ink-sac 



665. ,, cultrata, vascular system 



666. ,, ,, cephalic ganglia 



667. ,, ,, pedal and pleuro-visceral ganglia 



668. ,, section of eye 



669. ,, cultrata, statolith . 



670. ,, officinalis, renal organs 



671. ,, ,, diagrammatic sagittal section of female 



672. ,, male reproductive organs 



673. ,, sperms and spermatophore 



674. Nautilus pompilius, section of shell 



675. ,, ,, female in shell 



676. Nautilus macromphalus, entire animal . 



677. Nautilus pompilius, lobe of foot 



678. ,, ,, spadix 



679. ,, ,, cephalic cartilage . 

 (580. ,, ,, mantle-cavity of male . 

 081. ,, ,, dissection of male from left side 



682. ,, ,, arteries 



683. ,, ,, renal sacs, ctenidia, &c. 



684. , , , , male reproductive organs 



685. ,, ,, female ,, ,, 



686. ,, macromphalus, egg 



687. Octopus vulgaris 



688. Loligo vulgaris 



689. Argonauta argo . 



690. Octopus lentus, male 



691. Amphitretus pelagicus 



692. Shell of Spirula . 



693. Spirula peronii . 



694. Ammonite . 



695. Shell of Belemnite . 



696. ,, Argonauta argo . 



697. Segmentation of Loligo . 



698. Blastoderm of Sepia 

 J J ,, sections 



Development of Loligo 



699. 

 700. 

 701. 

 702. 

 703. 

 704. 



Diagram to Ulustrate the relationships of the Cephalopoda 



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VOL. I 



