vol.. XI 

 it^yi. 



'] PROCEEDINGS OF THE XATIoXAL Ml'SElM. 279 



anteniKo; the latter slender, not much exceeding cephalic lobe. Ten- 

 tacular cirri more slender than teutaculum. l*al[(i much stouter and 

 smooth, unless highly magnified. 



First pair of elytra round ; following one.-! oblong, somewhat wider at 

 outer part and emarginate on anterior edge ; outer an«l [)osterior edges 

 with dense fringe; surface covered with spines, which are small and 

 surrounded by a circular area on the smooth anterior region, while they 

 become larger, shar[), and surrounded by jiolygonal areas upon the pos- 

 terior part of the elytra. Here the polygonal areas bear smaller spines 

 or nodules near the edge. The large spines as well as small ones are 

 often bifid and form near posterior edge of elytrum a linear series evi- 

 dent to naked eye. 



Dorsal cirri, teutaculum, and anteiin;u den.sely papillated, I)ut ending 

 in smooth liliform tii)s. Ventral cirri small, slender, somewhat papii- 

 lated. Dorsal setic as in II. imhricata Malmgren. Ventral seta- with 

 nearly straight tips ami prominent hooks some distance below. 



Length up to 3 centimetres; diameter, including seta', 8 millimetres. 



The most common scale-Annelid found under stones, etc., in shallow 

 water and between tides, near the town. It was also dredged among 

 sponges near Uorse Island and at Green Rock, in June and October. 



NYCHIA Malmjrren. 

 Nychia cirrosa Malmgreu. 

 -Malmgken. Nordiska Hafs-Anuulata, p. bS, I'l. viii, Fig. 1. 



Wkii.ster. Aiiiu'l. Cli.i't., Province town, p. 7U0. 

 T.MHKi!. Anmilata Danica, pp. 79-80. 



Only one specimen was taken, 1884. 



LEPIDAMETRIA Webster. 



Lepidametria coiunieiisalis Webster. 



Wkrstf.r. Annel. Cba-t. Virginian Coast, pp. lO-l:i, PI. in, Figs. '23-31. 

 WiuisTEK. Aunel. Cha?t., Proviucetowu, p. 701. 



Only a single specimen of this interesting commensal annelid was 



taken in the tube of an amphitrite, found in the mud liat alongside the 



channel at Crab Point, in June, 1885. 



Family SIGALIONID.E. 



STHENELAIS Kinberg. 



Sthenelais picta Verrill. 



Vf.rRILI.. Invert. Anim. ot' Vineyard Sound, p. 348, r)8'2. 



\kui;ili.. New England Annelida, part 1, I'i. vii, Fig. 3; PI. vi, Fig. 7. I'roc. V. .S. 



Nat. Mu8., vol. II, p. 1G7. 

 Wkb.-^ter. Annel. Chict. of Virginian Coast, p. 13. 

 Wkrstkr. Annel. Clnrt., Provincetown, p. 701. 



This fine Annelid occurs in the sand between tides on Bird Shoal and 

 was often dug in 1884 and 188.1 at various periods of the summer and 

 early fall. 



