REPORT ON THE ASTEROIDEA. xxi 



which were originally more important than at present. As the outcome of these consi- 

 derations, Perrier relinquished the division of the Asteroidea into two sections or sub- 

 divisions, and divided the class into four orders, which he considers may be characterised 

 by the form of the pedicellariae. 



The following is Perrier's 1 summary of his classification, given verbatim : — 



1. FORCIPULAT.E. 



Pedicellaires pedoncules, droits ou croise's. 



Families : BeISINGID^E, PEDICELLASTERIDiE, ASTERIAD^E, HELIASTEMDiE. 



2. SPINULOSES. 



Pedicellaires en pince, resultant d'une modification des piquants. 

 Families : EchinasteriDyE, Pterasterid.e, AsterinidyE. 



3. VALVAT^E. 



Pedicellaires valvulaires ou en saliere. 



Families : Linckiad/E, GoniasteridyE, AsteropsidyE. 



4. PAXILLOS^E. 

 Pedicellaires formes par un ossicule squelettique et les piquants qui le recouvrent. 

 Families : Archasteridje, Astropectinhxe. 



On subsequent pages of the same memoir the names " Spinulosaj" and "Valvatae" are 

 changed to " Echinulatae " z and " Valvulatae " 3 respectively, and the following additions 

 are made to the families mentioned : — In the order Spinulosse, the families " Mithrodime " 

 and Solasteridse are included, 4 and in the order Valvatae (or Valvulatoe) the families 

 " Gymnasteriadae," Pentacerotidae, Antheneidae, and Pentagonasteridae take the place 5 of the 

 Goniasteridae and Asteropsidas of the above list. Three pages further on another family, 

 Goniopectinidae, is also referred to this order, Valvulatae ; but in the descriptive part of 

 the memoir, the type (and only) genus, Goniopecten, is placed 7 under the family Archas- 

 teridae in the order Paxillosae. 



1 Op. tit., p. 154. 2 Op. tit., pp. 167, 20G. 



3 Op. tit., pp. 1G4, 1G7, 221. 4 Op. cit., p. 164. 



5 Op. cit., p. 165. G Op. cit, p. 168. 



7 Op. cit., p. 249. 



