ERYLUS ROTUNDUS. 3I9 



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

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

 cladcs, main clades 70-270, end clades 10-160 /t long; clade-anglcs 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. 



Microrhabds: curved, centrotyle, pointed; 30-78 by 2.5-5 /i. Anisoadine 

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

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

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

 156 by 55-82 by 7.4-14 /(. 



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

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

 4055, 4062. 



Erylus rotundus Lendenfeld. 

 .\nte, p. 2"J0. 



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 tlie interior; surface dirty wliite to purj)lish brown or purplish gray or 

 l^urjilish black, one part of the surface often much darker than the rest. Some- 

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

 of the surface. 



Rhabd megasclercs : sharp-point etl amphioxes, blunt amjjhioxes, or am- 

 phistrongyles, variously combined, 310-650 by 6-15 11. Styles, anyuhniy bent 

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

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

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

 125-180 /.(; only in variety cidaris. Orthoplayiotriaenes: rhabdome 170-370 

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

 90-107°. 



Alicrorhabds: slightly cur^Td, variously but generally sharply pointed; 

 30-98 by 1.5-7.5 /t; 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 /«. 

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



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. 



