VII 



MOLL USO A S YSTEMA TIC EEVIE V ' 



25 



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

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

 whole shell e. 



_s-2--.< 



-.- 



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

 swimming position ; below, quiescent, watching for prey. 



