Annelida of the Bermudas. 655 



The number of setigerous segments is variable (18 to 70), but is 

 usually from 18 to 22. 



Subgenus Eudymene (typical) has 17 to 24 setigerous segments, 

 of which the three anterior have one to three ventral spines, and one, 

 two, or three preanal segments, without setse. 



jE. zonalis Y. = Praxilla zonalisV., 1874, is the only New Eng- 

 land species. 



Subgenus Praxillella has the same variation in the number of 

 setigerous segments, but has 4 or 5 achsetous preanal segments. 

 E. {Praxillella) gracilis occurs off the northern coast of New 

 England. 



Among European species of Eudymene^ besides the type, E. 

 (Erstedii (Clap.); E. palermitana (Gr.) ; E. planiceps (Sars), 1871; 

 E. digitata (Grube), belong to this group. But E. {Praxillella) 

 lumhricoides (Grube); E. {Praxillella) simplex (Clap.); E. {Prax- 

 illella) collaris (Clap.); E. {P.) gracilis (Sars); E. {P.) quadrilohata, 

 have the characters of the subgenus Praxillella. 



A very aberrant species from near Vineyard Sound, Mass. {E. 

 alongata (Lewis), as Glymene, Proc. Boston Soc. Nat. Hist., xxviii, 

 p. Ill, pi. 1, 2, 1897), has a remarkably large number of segments, 

 about 70 according to the excellent description and figures given by 

 Miss Lewis, to whom I am indebted for a specimen. In other 

 respects it does not differ much from the more typical species. But 

 the remarkable increase in the number of segments, so unusual in 

 this family, seems to be a matter of sufficient importance on which 

 to base a subgeneric group, which I propose to call Macrodymene, 

 with E. {M.) prodiicta (Lewis) as the type. 



The principal characters of this group are the pi-esence of a single 

 preanal non-setigerous segment and of more than 50 setigerous seg- 

 ments, the increase being in the postabdorainal region. As in the 

 typical group, thei'e are both bipennate and bilimbate setse, and the 

 rostrate uncini are of the usual form. 



Euclymene coronata, sp. nov. 



A large, stout species, none of the examples entire. Head short, 

 thick, with distinct transverse and oblique lateral grooves; median 

 ridge narrow, prominent, with a short obtuse tip; marginal lateral 

 lobes rather wide, erect, with a slight lateral notch, above which the 

 dorsal margin is divided into 8 or 10 small obtuse lobes or denticles. 



First three setigerous segments (as contracted) are short, subequal, 

 with a single (sometimes 2), stout, acute, slightly bent, yellow ventral 



