290 A HISTORY OF EECENT CRUSTACEA 



Alima is tlae larva of . . . Squilla. 



Alimeriohthus Squilla {Ohloridella group). 



Lysioerichthus (sliort-spined) Lysiosquilla. 



Jjysioerichthus (long-spined) . Lysiosquilla 



(Gwonis group). 



Uriclithalima Ooronida. 



PsevdericJdhus Pseudosquilla. 



Oonerichthus Gonodaciylus. 



An unknown form .... Protosquilla. 



In support of this aflBliation Brooks says, ' Faxon lias 

 reared a Squilla ennpusa from an Alima larva. The Chal- 

 lenger collections show that the larva of Lysiosquilla macw- 

 lata is one of the short-spined Lysioeriehthi ; I have reared 

 Lysiosquilla (Ooronis) exoavatrix, one of the more primitive 

 Lysiosquillce, from a long-spined Lysioeriohthus. Claus has 

 figured a series which shows beyond question that at least 

 one species of Pseuderichthus becomes a Pseudosquilla, and 

 the Challenger collections furnish equally good proof that 

 the Ohiragra group of Gonodadyli come from Gonerichthus 

 larvae, and I therefore believe that we may very safely 

 assume that all the Lysioerichthus larvae are young Lysio- 

 squillce, all the Alima larvae young Squillce, Alimerichthus 

 one of the lower Squillce or Chloridellce, all the Gonerichthi 

 young Gonodadyli, Lrichthalima very probably a young 

 Coronida, and all the Pseuderichthi very probably young 

 Pseudosquillce.' 



