320 EPvYLUS ROTUNDUS VAR. CIDARIS. 



Erylus rotundus v:ir. megarhabda Lende.nfeld. 

 Ante, p. 309. 



Cortical ai'iiiour composed chiefly of microrhabtls. Rhahd mcgasderes : 

 mostly sharp pointed; blunt forms rare; 330-650 bj' 6-13 /t. Rhabd-clusicrs 

 absent. Orthoplagiotrioenes: rhabdome 170-370 /t long; cladome 160-350 /( 

 broad. Miavrhabds: gradually and sharply pointed; 43-98 by 3-7.5 /t; cen- 

 tral tj'le small or absent. Acanthtylasters with three or more raj's; 12-27 fi 

 in diameter. Small oxyaders: 7.5-17 /i in diameter. Aspidusters : 55-66 by 46- 

 59 by 4.6-S.8 /;. 



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

 Station 3S49; coast of Kauai. "Albatross" Station 3982. 



Erylus rotundus vur. typica Lendbnfeld. 

 Ante, p. 309. 



Cortical armour comjX)sed chiefly of aspidasters. Rhahd megascleres: 

 sliarj) i^ointed or blunt amphioxes, or amphistrongylcs; 310-570 by 6-15 pi. 

 Rh(d)d-clusten: absent. Triacnes: rhabdome 200-220 /.i long, cladome 150- 

 400 n broad. Micwrhabds: variously jjointed or blunt, with or without central 

 tyle; 30-66 by 1.5-4 fi. Acanthtylasters: with three or more rays; 15-31 ja in 

 diameter. Oxyasters: 7-16 _« in diameter. Aspidasteis: 50-77 by 48-70 by 

 4.4-7.8 fL 



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

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

 east coavst of Hawaii. "Albatross" Station 4061. 



Erylus rotundus var. cidaris Lknuenfeld. 

 Antf, p. 310. 



Cortical armour composed chiefly of aspidasters. Rhahd megascleres : chiefly 

 sharji-pointed ami)hioxes; 440-650 by 8-12 fi. Rhabd-clustcrs : 125-180 ;i long. 

 Triaenes: rhabdome 180-190 /( long, cladome 300-440 /< broad. M icrorhabds : 

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

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

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



Central Pacific. Hawaiian Islands: south coa.st of Molokai. "Albatross" 

 Station 3849. 



