PROCEEDINGS OF THE UNITED STATES NATIONAL MUSEUM 



' hy the 



SMITHSONIAN INSTITUTION 



U. S. NATIONAL MUSEUM 



Vol. 86 Wa8hington: 1939 No. 3049 



NEW SPECIES OF POLYCHAETE WOEMS OF THE GENUS 

 EUPHROSYNE, WITH NOTES ON EUPHROSYNE BORE- 

 ALIS 0RSTED 



By Aaron L. Treadwelx. 



In a recent paper (Treadwell, 1937, p. 25) I identified as 

 Euphrosyne borealis 0rsted some annelids collected in Greenland by 

 Capt. Robert A. Bartlett. Later comparison of these with other 

 members of the genus led me to question the accuracy of this iden- 

 tification, and through the kindness of Dr. Waldo L. Schmitt I have 

 had opportunity to examine all specimens of this genus in the col- 

 lections of the United States National Museum. These were all 

 labeled Euphrosyne horealis^ but it appears that three species are 

 represented. 



Euphrosyne differs from the other members of the family 

 Amphinomidae in that the neuropodia and notopodia are fused into 

 a continuous ridge running from the ventrolateral border to the 

 dorsal surface, leaving more or less of the middorsal region uncov- 

 ered. The only species hitherto described from the northeastern 

 coast of North America is E. horealis 0rsted (1842, p. 113). 0rsted's 

 description is very brief, and the only addition to his account that 

 I know is that of Mcintosh (1885, pp. 5-6; pi. 1, figs. 2, 3; pi. lA, 

 figs. 4^6), who corrected ^rsted's statement that there are no dorsal 

 cirri and gave some figures of the setae. To this account a few 

 details may now be added. 



107282—39 169 



