Plates XXX and XXXI. Third-Stage Lobster. 



The third-stage larva, at the age of nine days, is usually about 11.5 nun in 

 length. The antenn. and the thoracic appendages have continued to develop. 

 The torsaon of the claws of the chelipeds is not well shown in these figures The 

 appearance of the appendages on the sixth abdominal segment are shown to- 

 gether with the modification of the tail-fan. 



