STOMATOPODA. 



509 



are as yet, and remain through several ecdyses, without limbs. 

 The first abdominal appendages however appear at this stage, 

 and a large caudal plate, the telson, terminates the body. 



FIG. 311. Four consecutive Erichthoidina stages, a', a" first and second antennae ; a!-a 6 

 the six abdominal legs ; I-V the five maxillipeds ; 6, 7 and S the posterior thoracic seg- 

 ments, limbless at this stage (from Korschelt and Heider, after Clans). 



It appears probable that the metanauplius represented inFigJSlO A, is a 

 Stomatopod larva in a still earlier stage than the Erichthoidina.* The 

 fully formed condition of the eyes at this early stage, the large size and 

 shape of the carapace, its limitation to the cephalic region and the disposition 

 of its spines are features which connect it with the Erichthoidina. On the 

 other hand the jointed caudal fork recalls the Phyllopod A pus. Its jointed 

 character is a feature retained by no other known Malacostracan larva. 



* Cf. J. J. Lister, On a (?) Stomatopod Metanauplius Larva, Q.J.M.S., 

 xli (1898), p. 433. 



