34 AKT. 1. T. TJI!\rA : HEXACTINELLTDA, III. 



d''. — Without aspidoplumicome. Gastralia pentactinic. Discohexaster in one kind 



Placopegma. 



a'.— Paratangentials of dernialia beset with small erect spines on the outer 



surface. Witli s'eve-plate and anchoring needles. Discohexaster up to 



100;/. in diameter Placopegma sohUum. (B. of Bengal). 



h^. — Paratangentials of dermalia without spines. Discohexaster spherical, 



140 \i. in diameter 



Placd-pegma sj)., F. E. Sen. *99, p- 44. (SW. of Vancouver Is.). 



I now proceed to give fall descriptions of the genera and 

 species that occur in the Sagami Sea. 



LEU COPS ACUS=^= Ij. 

 Ijima, '98, p. 42. 



Leucopsacids with small, ovoid or spindle-like body, which 

 may be stalked. Parenchymalia chiefly hexactins ; diactinic 

 parenchymalia present, but play a subordinate part. Gastralia 

 represented by hexactins similar to those of the parenchyma. 

 Discohexasters in part hexactinose and in part hexasterous. 



lEUCOPSACUS ORTHODOCUS j Ij- 



PI. III., figs. 14-26. 



Leucopsacifi^ orthodocus, Ijima, '98, p. 42. 



The species is based on two specimens, obtained by myself 

 at different times at and near Doketsba from a depth of, say, 

 214-429 meters (117-235 faths.). 



* >.£vxbi:, white ; <\ia.Y.aç, drop, 

 ■j" ôp8bç, straight ; cov.hç, bearn, 



