Plate 1 



Barentsia discreta Busk 



(All figures drawn with aid of camera lucida) , 



Figure A: One zoid, drawn from the right side. Rigid peduncle shows a faint annula>l 

 tion or incipient joint (J), lacking in peduncles of other zoids in the collection sample,. 

 Scale a. 



Figure B: Basal part and flexible musclla of two zoids. Left musclium rests on base 

 off our stolons; right one shows two stolons. Scale a. 



Figure C: Soft, flexible, muscular pedicel; top of rigid peduncle; and base of fleshy calyx 

 Scale c. 



Figure D: Calyx as seen from left side. Structures topping the stomach were difficulii 

 to distinguish and are not pictured very well here. Darkest area is location of liver anc 

 gonads and is the ambiguous area referred to. Lophophore contracted and curved over sc 

 tentacles are tangled In vestibule. Scale b. 



Figure E: Enlargement of annulated peduncle region of figure A. Thick inner chitinouM 

 cuticle layer is interrupted by the irregularly spaced "pores" (PO) which characterizci, 

 peduncle of Barentsia discreta. Outer chitinous layer very thin and barelj' indicated bjl-' 

 light colored wrinkling in annular region (J). Scale c. 



Key to abbreviations 



C, calyx PE, pedicel part of stalk 



CU, inner chitinous cutic'e layer PN, peduncle part of stalk 



ES, esophagus PO, pore or gap in inner cuticle layer 



GA, stomach R, rectum 



IN, intestine SE, septum 



J, incipient joint or annulation ST, stolon 



M, musclium T, tentacles 



