32 THÉEL, PRIAPULIDS AND SIPUNCULIDS OF THE SWEDISH ANTARCTIC EXPEDITION 1901 — 1903. 



Thus, e. g., the southern form has up to 30 tentacles (fig. 75) — in the 

 northern form I counted from 16 to 26 — ; its hooks, when such are present, seem 

 to be slightly larger (fig. 53) and its horseshoe-shaped papillae slightly more irregular 

 (figs. 61 — 64). With regard to the whole organisation, I ref er the reader to the 

 figures 50 — 65 of this paper and to a former paper on the northern Sipunculids. 1 



Kungl. Svenska Vetenskapsakademiens Handlingar. Bd. 39. Stockholm 190G. 



