\ 



VII 



MOLLUSC A SYSTEMATIC REVIEW 



25 



FIG. 36. Female of Argonauta Argo (after Verany). Second, third, and fourth pairs of arms 

 stretched downwards, a, Siphon; b, eye; c, first pair of arms, covering with its sail d nearly the 

 whole shell e. 









FIG. 37. Octopus vulgaris, after Merculiano (in "Aquarium Neapolitanum"). Above, in 

 swimming position ; below, quiescent, watching for prey. 



