40 



PROCEEDIlSrGS OF THE NATIONAL MUSEUM 



VOL. 81 



branes, which have an irregular streaky appearance, though the 

 dictyonal framework is visible from the outside. 



FiGDUH 6. — Farrea beringiana, new species : a. Dermal pentactiii ; 5, small clavula ; 

 c, upper view of head of small clavula ; d, small clavula ; e, large clavula ; f, 

 upper view of head of large clavula ; g, tylohexastcr ; h, tylohexaster ; i, tylohex- 

 aster ; j, discohcxastcr ; k, large extremity of diactin ; I, small extremity of diactin. 

 All X 250 



Spiculation.~ThQ dictyonal framework exhibits notable variations 

 in the different regions of the plate, but chiefly forms perfectly 

 square or rectangular meshes of variable sizes. Most of ih^ beams 



