of the Virginian Coast. 



237 



Leodice opalina Sav. Syst. des Ann., p. 51. 

 Nereidonta sanguinea Blv. Diet. Sci. Nat. 



Eunice sanguinea Aud. & Ed. Ann. Littoral de la France, p. 147. 



" " Grube. Fam. der AnneL, pp. 44, 123. 



" " " Die Insel Lussin. 



St. Malo and Roscoff. 



" " Leidt. Mar. Invert. Fauna R, I. and N. J., p. 15. 



" " Johnston. Cat. of Worms, p. 134. 

 Marphysa sanguinea Quatr. Hist. Nat. des Ann. vol. i, p. 332, pi. x, f. 1. 



" " Ehlers. Borstenwiirmer, p. 360, pi. xvi, figs. 8-11. 



" " Baird. Linn. Proc. Zoology, vol. x, p. 352. 



" " Mar. & BoBR. Ann. des Sci. Nat., vol. ii, p. 12. 1875. 



'* Leidii Quatr. Hist. Nat. des Ann., vol. i, p. 337. 



*' Leidyi Verr. Invert. An. Vin. Sound, pp. 319, 593, pi. xii, f . 64. 



Prof. Leidy first reported this species from our coast. I 

 have no doubt as to the accuracy of his identification. 

 Quatrefages changed the 16 of Leidy's description into 60, 

 in translation, and gave to this new (hypothetical) form a 

 new name, M. Leidii. This mistake seems to have passed 

 unnoticed. In regard to Leidy's statement that the bran- 

 chiae begin on the 16th segment, it is probable that he ex- 

 amined only small specimens in coming to this conclusion. 

 It will be seen below that the branchiae may begin on any 

 segment from the 10th to the 23d. 



Young Stages : This species abounded in individuals in 

 all stages of growth from 2.5°"™ to over 20 centimetres in 

 length. The gradation was perfect, and the results seem 

 interesting. 



(a.) Youngest form taken : two specimens, 18 and 22 

 setigerous segments. No antennae ; no branchiae ; no in- 

 dication of division of the head into lobes (palpi) above or 

 below. 



Eyes five, situated as in f. 81. These specimens agree 

 with this figure in every particular, except the slight emar- 

 gination of the head, and in the presence of an antenna. 



The feet are fleshy rounded lobes ; the dorsal cirri blunt, 

 Trans. ix.'\ 31 



