86 first Annual Report 
ordinary length of the body as six inches (i. e., about 150 mm.). 
Joubin® records a specimen having a total length of 195 mm., mantle 
110 mm. The body of our specimen is considerably over twice as 
long as the largest here cited. Its more important dimensions are 
therefore appended below: 
Figure 48. Anatomical details of Polypus bimaculatus 
A, Circulatory system (right kidney removed). B, Male reproductive organs. 
C, Jaw. D, Female reproductive organs. FE, Alimentary canal and liver. F, Ali- 
mentary canal. From dissections by Miss Guernsey. 
Length to tail 680 mm.; length, exclusive of arms, 353 mm.; length, 
exclusive of tentacles, 488 mm.; length of mantle (dorsal) 313 mm.; 
width of mantle 80 mm.; length of fins, total, 188 mm.; length of fins 
along plane of attachment 164 mm.; width across fins, 215 mm.; 
leneth of head 40 mm.; width of head 49 mm.; length of dorsal arm 
101 mm.; length of second arm 120 mm.; length of third arm 116 mm.; 
*Ceph. “Princ.-Alice,” 1900, p. 63. 
