1394 



CRUSTACEA. 



From these transitions the relation of the antennae of the young to 

 the pedicel of the mature animal is obvious. Both have the same 

 base ; and the lower part of the pedicel at least is the homologue of 

 the disk terminating these antennas. The upper part may be, as 

 Darwin, suggests, an elongation of the proper head of the Cirriped. 



Of the figures here referred to, figure 3, is from a species collected 

 off Tierra del Fuego, on floating sea-weed ; 5, was taken in the Pacific, 

 latitude 30° north, longitude 179° east; 6, January 21, 1839, in lati- 

 tude 40° south, longitude 55i° west; figures 7, 8, in latitude 2° north, 

 longitude 18° west, on October 30, 1838. 



