124 BULLETIN OK THE ML'SEUM OF COMPARATIVE ZOOLOGY. 



EXPLANATION OF PLATES. 



PLATE IV. 



Fig. L Octopus pnnctuttis Gahh. Male. Dorsal view, from an alcoholic specimen, 

 somewhat restored. R"duced to one fourth natural size. 



PLATE V. 



Fig. L Ortopus bimacidalus Verrill. Male. Side view. Une half natural size. 

 Somewhat restored from an alcoholic specimen. 



" la. The same. Ilectocotylized arm. Side view, showing the marginal groove 

 spread open and the very small terminal organ. Fnlarged two diam- 

 eters. 



" 2. OdojJHS pnnrtatits Gabb. Distal iiortion of the hectocotylized arm, front 

 view, siiowing the terminal organ, spread ojien, and the coniinencenient 

 of the marginal groove, with a few' of the distal suckers. Enlarged two 

 diameters. 



PLATE VI. 



Fig. L Ociopits I'iinnriilatu.sVerriW. ]\Iale. Front view of the inner surf ace of the 

 web and arms, showing the entire length of the right arm of the second 

 and third pairs, and the basal portion of the other arms. To illustrate 

 ]iarticularly the great size of certain suckers of the lateral arms. 



