Manchester Memoirs, Vol. xlv. (1901), No. 13. 7 



Anterior Parapodia. The transverse lines represent 

 the lengths from top of dorsal to bottom of ventral cirrus, 

 in each case magnified ten times. The lengths of these 

 lines, in mm., are given by the figures in brackets. 

 G. norvegica v.falk- 



landica, 29th segment. (19) 



G. norvegica. 29th segment. (13) 



G. imiltidentata. 17th segment. — (4) 



G. hupferi. 8th segment. (5) 



G. hupferi 28th segment. (5 '6) 



G. congoensis. 28th segment. (ii) 



Median Parapodia. Lengths from top of dorsal to 

 bottom of ventral cirrus, magnified ten times. 



G. norvegica v. falklandica. 



about looth segment. (35) 



G. norvegica. 122nd segment. (35) 



G. hupferi. 71st segment. (lO'S) 



G. imiltidentata. 80th segment. (13) 



Posterior Parapodia. Lengths magnified ten times. 



G. norvegica v. falklandica. (25) 



G. norvegica. (20) 



The accompanying table (pp. 8—9) and diagrams show 

 that, while the anterior parapodia closely resemble the 

 specimens from Norway in size and structure, they differ 

 from those of the tropical species in these respects. It is 

 noteworthy that the lower limb of the notopodium is 

 developed nearer the anterior end of the body in the 

 tropical species, G. hupferi and G. congoensis, than in the 

 species from the Falkland Islands and from Norway. 

 The parapodia of the 28th segment of the two latter 

 correspond with those of the 8th segment in G. Jiupferi, 

 and with the 17th segment in G. imiltidentata, in that the 

 lower limb of the notopodium is absent. 



