404 S. L Smith—Early stages of the Lobster, 
the branchial processes are distinctly lobed along the edges, and 
ave begun to assume the form of true branchie. The seg- 
or clothing of hairs or sete, The penultimate segment is s 
without appendages. 
Third Stage—In the third stage (pl. IX, figs. H, F, @) the 
larvee are about half an inch (12 to 13™™) in length, and the 
integument is of a much firmer consistency than in the earlier 
stages, The antennule are still rudimentary, and considerably 
shorter than the rostrum, although the secondary flagellum has 
increased in length, and begins to show division into numer 
ous segments. The antennz retain the most marked feature of 
the early stages—the large size of the scale—but the flagellum 
is much longer than the scale, and begins to show division 
into segments. The mandibles, maxille, and first and second 
verse articulation near its eeeanty, and both are ™ 4 
except the outer edge of the outer lamella, with Jong P umos? 
