THE METAMORPHOSES OF CRUSTACEA 71 



behind, and a rostral spine which is several times 

 as long as the body of the animal. A great develop- 

 ment of spines also 

 characterizes the larva 

 of Munida (Fig. 27). 



The larval form of 

 the Common Lobster 

 has already been de- 

 scribed, and it will be 

 noticed that the dif- 

 ferences from the 

 adult are much less 

 than in the case of 

 the Crab. From the 

 fact that this larva 

 has swimming exopo- 

 dites on its legs, like 

 the adult Mysidacea 

 and Euphausiacea 

 (formerly grouped to- 

 gether as " Schizo- 

 poda "), it is said to 



be in the " schizopod stage." The larva of the 

 Norway Lobster {Nephrops norvegicus) is essentially 

 of the same type, but the great development of the 

 spines on the abdomen and of the forked telson 

 gives it a striking appearance. 



A very remarkable type of larva is found among 

 the Spiny Lobsters and their allies (Scyllaridea). 



Fig. 27 — First Larval Stage of 

 Munida nigosa (see Plate VI.). 

 X 10. (After Sars.) 



