320 



ERYLUS ROTUNDUS VAR. CIDARIS. 



Erylus rotundus var. megarhabda Lkndenfeld. 

 Ante, p. 309. 



Cortical armour composed chiefly of microrhabds. Rhabd megascleres: 

 mostly sharp pointed; blunt forms rare; 330-650 by 6-13 fi. Rhabd-clusters 

 absent. Orthoplagiotriaenes: rhabdome 170-370 n long; cladome 160-350 f.i 

 broad. Microrhabds: graduafly and sharply pointed; 43-98 by 3-7.5 jj.; cen- 

 tral tyle small or absent. Acanthtylasters with three or more rays; 12-27 p. 

 in diameter. Small oxyasters: 7.5-17 /x in diameter. Aspidasters : 55-66 by 46- 

 59 by 4.6-8.8 /i. 



Central Pacific. Hawaiian Islands: south coast of Molokai. "Albatross" 

 Station 3849; coast of Kauai. "Albatross" Station 3982. 



Erylus rotundus var. typica Lendenfeld. 

 Ante, p. 309. 



Cortical armour composed chiefly of aspidasters. Rhabd megascleres: 

 sharp pointed or blunt amphioxes, or amphistrongyles ; 310-570 by 6-15 fx. 

 Rhabd-clusters: absent. Triaenes: rhabdome 200 220 fi long, cladome 150- 

 400 /JL broad. Microrhabds : variously jjointed or blunt, with or without central 

 tyle; 30^66 by 1.5-4 /t. Acanthtylasters: with three or more rays; 15-31 a in 

 diameter. Oxyasters: 7-16 n in diameter. Aspidasters: 50-77 by 48-70 by 

 4.4 -7.8 fi. 



Central Pacific. Hawaiian Islands: south coast of Molokai. "Alba- 

 tross" Station 3849; coast of Kauai. "Albatross" Stations 4024,4128; north- 

 east coast of Hawaii. "Albatross" Station 4061. 



Erylus rotundus var. cidaris Lendenfeld. 

 Ante, p. 310. 



Cortical armour composed chiefly of aspidasters. Rhabd megascleres : chiefly 

 sharp-pointed amphioxes ; 440-650 by 8-12 Rhabd-clusters: 125-180 /i long. 

 Triaenes : rhabdome 180-190 /i long, cladome 300-440 fi broad. Microrhabds : 

 gradually and sharply pointed, more or less centrotyle; 32-50 by 2-4.5 fi. 

 Acanthtylasters: with two or more rays; 12-31 ft in diameter. Small oxyasters: 

 8-14 ft in diameter. Aspidasters : 65-75 by 62-69 by 5-7 /<. 



Central Pacific. Hawaiian Islands : south coast of Molokai. "Albatross" 

 Station 3849. 



