II. GENERAL SYSTEMATIC ACCOUNT OF THE GENERA, SPECIES, 

 AND VARIETIES FROM THE PACIFIC OCEAN. 



Erylidae. 



Teti'axonitla with rhabd and teloclade megasderes, and a superficial armour 

 composed of a.spidasters and microrlialjds. Euasters are always present in the 

 ^choanosome. 



For the present I place only one genus, Erylus, in this family. 



ERYLUS Gray. 



Witli uiiiporal afferents and unii)oral efferents or larger tjscules. Without 

 ana- or protriaenes. 



Twenty-two sj)ecies are known. Eight of these occur in the Pacific Ocean. 



SUMMARY OF THE SPECIES FOUND I\ Til!': PACIFIC OCEAN. 



A, The large choanosomal euasters are oxyasters. 

 A2 The teloelades are orthoplagiotriaenes. 



A3 The microrhabds have pointed ends. 



E. placenta Thiele. E. monticularis Kirkpatricli;. 

 B3 The microrhabds are amiihistroiigyle centrotj'les. 



E. decumbens Lindgrcn. 

 Bo The teloelades are cliiefly dicliotriaenes. 



E. oxyaster Lendenfeld. 



B, The large choanosomal euasters are acantht\-lastei"s. 

 Ao The asi)idasters are about twice as long as broad. 



E. nobilis Thiele. E. sollasii Lendenfeld. 

 B2 The aspidastei-s are nearly as broad as long. 



E. rotundus Lendenfeld, var. megarhabda Lendenfeld, var. typica 

 Lendenfeld, var. cidaris Lendenfeld. 1']. calieulatus Lendenfeld. 



