290 A HISTOfiy OF EECENT CKUSTACEA 



Alima is tlie larva of ... 8qni.Ua. 



Alimerichthus Squilla (Chloridella group). 



Lysioerichthus (short-spin ed) Lysiosquilla. 



Lysioerichthus (long-spined) . Lysiosquilla 



(Coronis group). 



Erichthalima Coronida. 



Paeudericldhus Pseudosquilla. 



Gonerichthus Gonodactylus. 



An unknown form .... Protosquilla. 



In support of this affiliation Brooks says, ' Faxon has 

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

 lenger collections show that the larva of Lysiosquilla macu- 

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

 Lysiosquilla, (Coronis) excavatrix, one of the more primitive 

 Isysiosquillcti, from a long-spined Lysioerichthus. Glaus 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 Chiragra group of Gonodactyli come from Gonerichthus 

 larvee, and I therefore believe that we may very safely 

 assume that all the hysioericlitlms larvas are young Lysio- 

 sqidllcK, all the Alima larvse young Squillce, Alimerichthus 

 one of the lower Squillca or Chloridettce, all the Gonerich thi 

 young Gonodadylij Erichthalima very probably a young 

 Coronida, and ail the Pseuderichthi very probably young 

 Pseudosquillce.' 



