PALINURUS OR THE SPINY LOBSTER OF BOMBAY. 389 



The eyestalks are of great length; they, the antennules, and the 

 antennae are all borne on the anterior margin of the carapace. 

 You will note the gradual shifting of the position of the eyes 

 from the ventral surface of the embryo in the egg to the an- 

 terior margin in the phyllosome and finally to the dorsal surface 

 of the adult. 



The liver can be seen through the transparent disc as a more or 

 less branched diverticulum of the mid-gut. 



The abdomen is very small, and you can see six pair of small 

 appendages, the pair of the first somite disappearing before the adult 

 condition is reached. In most phyllosomes the posterior margin of 

 the hinder disc is notched to receive the abdomen. 



The nerve cord is double ; in the specimen sketched there were 

 six distinct thoracic ganglia. The reproductive organs cannot be 

 recognised. 



The phyllosome stage lasts a month or two, during which time it 

 moults about four times ; at the last moult the discs exchange for a 

 carapace of the adult pattern. 



The phyllosomes sketched should not as yet be definitely regarded 

 as those of the species or perhaps the genus described. The 

 phyllosomes of the various members of the family have not yet 

 been differentiated. 



