REPORT ON THE ASTEROIDEA. Xxl 
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 pedicellariz. 
The following is Perrier’s* summary of his classification, given verbatim :— 
1. FORCIPULATA. 
Pédicellaires pédonculés, droits ou croisés. 
Familles: Brisincipa, PEDICELLASTERID®, ASTERIADA, HELIASTERIDA. 
2, SPINULOSA. 
Pédicellaires en pince, résultant d’une modification des piquants. 
Familles: EcuinasterID&, PrrrasTERID&, ASTERINID®. 
3. VALVATA. 
Pédicellaires valvulaires ou en saliére. 
Familles: Linck1aAp, GONIASTERID, ASTEROPSID&. 
4, PAXILLOS. 
Pédicellaires formés par un ossicule squelettique et les piquants qui le recouvrent. 
Familles: ARCHASTERID®, ASTROPECTINIDA. 
On subsequent pages of the same memoir the names “ Spinulosee” and “ Valvatee” are 
changed to “ Echinulate”” and “ Valvulate”° respectively, and the following additions 
are made to the families mentioned :—In the order Spinulosee, the families “ Mithrodinz”’ 
and Solasteridee are included,* and in the order Valvatze (or Valvulatee) the families 
“ Gymnasteriadz,” Pentacerotidee, Antheneidz, and Pentagonasteridz take the place’ of the 
Goniasteridze and Asteropsidze of the above list. ‘Three pages further on another family, 
Goniopectinide,” is also referred to this order, Valvulatee ; but in the descriptive part of 
the memoir, the type (and only) genus, Goniopecten, is placed’ under the family Archas- 
3 
teridse in the order Paxillosee. 
Op, cit., pp. 167, 206, 
Op, cit., p, 164, 
Op. cit., p. 168. 
1 Op, cit., p. 154, 
3 Op, cit., pp. 164, 167, 221. 
5 Op, cit., p. 165, 
T Op, cit., p. 249, 
a & Pw 
