bephalothora.x,and liicewise that tne spherical head, 

 furnished with such a large number of processes, is 

 really a sirailar outgrowth and projection from the 

 under surf ae e of tne first portion of tne cephalo— 

 thorax,"by wnich means tne second antennae gradually 

 come to oe on tne dorsal side of tne animal. 



Finally we may De sure tnat tne arcned and elongate 

 Dval port ion, wnich is on the dorsal side of the head, 

 sspecially of the older Penne 11 as, and the pigment 

 flecies and spots, which border and define it,indicate 

 plalnly the animal' s original thoracic part, and the 



ings which are fused with it or follow after it. 

 Thidt the second antennae which are immovable in 



he older stages, in this young stage are very mo vable 

 ind the swimming legs are quite as well developed,is 

 4 necessary result, just as we have been convinced that 

 :he inner antennae, which cannot be found in the o ld- 

 stages, toge ther with the maxillae and maxillipeds, 

 tre present here. 



In the earliest developmental period observed by us 

 ;ne young Pennellas or Pennella larvae,as you may 

 tficcse to eall them,show on the one side no little 

 inalogy to the genus Lonchidrua;but on the other side 

 -he same Pennellas in this stage are stripped of all 



