ERYLUS ROTUNDUS. 



319 



140-520 by 8-22 fx, rarely reduced in length and thickened; cladomes very poly- 

 morphic; clades simple or bifurcate; simple clades 120-300 ^(long; bifurcate 

 clades, main clades 70-270, end clades 10-160 /« long; clade-angles 86-116°; 

 in some specimens all the triaene-clades are simple, in some? the majority are 

 simple, the minority bifurcate, in some the majority are bifurcate. 



Microrhahds: curved, centrotyle, pointed; 30-78 by 2.5-5 /«. Anisoactine 

 and hranched microrhabd-derivates: of similar dimensions; rare. Acanthtyl- 

 asters: two to fourteen or more rays; total diameter 10-38 fi. Aspidasters: 

 oval, rounded rhomboidal, or irregular with lobose marginal protuberances ; 95- 

 156 ])y 55-82 by 7.4-14 /i. 



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

 Stations 3847, 3848, 3849; northeast coast of Hawaii. "Albatross" Stations 

 4055, 4062. 



Erylus rotundus Lendenfeld. 

 Ante, p. 2i)0. 



Massive, oval or somewhat irregular, with lobose, gyriform, or digitate pro 

 tuberances. Surface usually more or less rugose. In spirit : dirty white to light 

 brown in the interior; surface dirty white to i)urplish brown or purj)lish gray or 

 purplish black, one part of the surface often much darker than tiie rest. Some- 

 times with whitish spots, marking the position of the pores, on the darker parts 

 of the surface. 



Rhahd megascieres : sharp-pointed amphioxes, blunt amphioxes, or am- 

 phistrongyles, variously combined, 310-650 by 6-15 Styles, angularly bent 

 and branch-bearing rhabd-derivates : of similar dimensions; rare. Aster-like 

 rhabd-clusters: four to ten conical, irregularly distributed, longer, and a number 

 of very short rudimentary, cylindrical, terminally rounded rays; total diameter 

 125-180 fi; only in variety cidaris. Orthoplagiotriaenes: rhabdome 170-370 

 by 6-12 /i; clades often slightly, irregularly curved ; 80-270 /« long ; clade-angles 

 90-107°. 



Microrhahds: slightly curved, variously but generally sharply pointed; 

 30-98 by 1.5-7.5 /«; with or without central tyle, the latter when present small. 

 Acanthtylasters : two to fourteen rays ; total diameter 12-31 /<. Small oxyasters: 

 eight to twenty-two or more, conical, spined rays; total diameter 7-17 /jl. 

 Aspidasters: broad oval to circular; 50-77 by 46-70 by 4.4-8.8 /x. 



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

 Station 3849; coast of Kauai. "Albatross" Stations 3982, 4024, 4128; north- 

 east coast of Hawaii. "Albatross" Station 4061. 



