SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 98 



10 11 



Fig. 1. — Thy one lugubris, n. sp. 



1, end plate from young individual 3 mm. long; 2-4, knobbed buttons from 

 inner layer of integument; 5-7, supporting tables from tube feet; 8, 10, 12, 

 plates from tentacles ; 9, plate from superficial layer of integument with ex- 

 ternal side covered by a reticulum; 11, table from introvert. 



All from type, except No. 1 which is from an embryo from the type. 



Scale, mm. 

 100 



