REPORT OF COMMISSIONERS OF INLAND FISHERIES. 225 



EXPLANATION OF PLATES 26 AND 27. 



First larval stage; length, 8 mm.; age, 3 days. 



First antenna: 



Project hardly to the end of the rostrum; endopodites have begun to 

 bud off from the exopodites; the former are furnished with one long 

 seta; the latter are tufted with four or five setse. (The first antennae 

 are here described as if biramous.) 



Second antenn.e: 



Exopodites and endopodites are about equal in length; edges of former 

 are fringed with a variable number of long feathered setse; the ends of 

 the latter are tipped with several long setae; the antennal segments are 

 not yet visible. 



Eyes: 



Very large and prominent; they contain in life a white iridescent pig- 

 ment. 



Maxillipeds, second and third pair: 

 These are furnished with exopodites. 



Chelipeds: 



These are furnished with exopodites or swimming appendages; the 

 dactyl of the claw opens upward and outward. 



Ambttlatory appendages: 



The first two pairs have the rudiments of claws; the last two pairs 

 have not. All are furnished with exopodites; gills (as also is the case 

 with the maxillipeds and chelipeds) are attached beneath the carapace 

 border to the first segment (coxopodite) . 



Abdominal appendages : 



These have not yet appeared, though they may often be seen in the 

 first stage lobster as buds beneath the cuticle, on the under side of the 

 abdomen. 



Tail: 



Has the shape of a simple fan; the exopodites of the last abdominal 

 segment have not yet appeared; the posterior margin is bordered with 

 short, spine-like setae. 



