^^li'Jl'^'] PROCKEDINGS OF THE NATIONAL MUSEUM. 287 



the one smooth, the other witli a roiiiidi'd boss. Color dark, except 

 anteriorend, which is flesh color with sprinkling of dark dots; branchiie, 

 dark brown; antenna-, reddish brown; body, translucent posteriorly; 

 anus, very large ; anal cirri, shorter and more slender than median an- 

 tenna". Length up to 1 meter; breadth, without parai)odia, IG milli- 

 metres; median antenna, 10 millimetres. 



This species is more common than the preceding on the outer part of 

 IJird Shoal at low-tide mark and below, constructing stout tubes which 

 l»r()ject several inches above the sand, and arc covered with bits of 

 shells, etc., and inclined to one side near the end. Young individuals, 

 1 centimetre long, are sometimes found in small tubes attached to the 

 side of the large tubes — one of the few stable objects on these sand flats. 



This is one of the largest Annelids of our coasts, full-grown specimens 

 measuring upwards of 4 feet when freshly dug out of their correspond- 

 ingly long vertical tubes. As they readily retire into the lower part of 

 the tube and are easily broken into ])ieces in attempting to remove them, 

 few jierfect specimens can be obtained ; but when the tide is rising over 

 the tube, it is found that the animal is apt to be near the oritice and 

 can, moreover, be more readily dug out uninjured when the tube re- 

 mains under water. 



The color is noticeably dark, only the anterior 3 or 4 inches being 

 flesh color with blackish, minute 8i)ots. Posterior to about the first 7 

 inches the color is dark greenish brown, with translucent yellowish sides 

 wliere contents of intestine do not give an opaque ai)pearancc. Branchiu' 

 dark red-brown. 



This species is readily recognized at a glance as ditieriug from D. 

 cuprea in the character of the brauchite. It is probably this species 

 also, and uotD. cuprea, which produces the remarkably elongated, cylin- 

 drical masses of Jelly found on the sand flats, drifted about by the tides. 

 Each mass contains innumerable larviB, the eggs having developed 

 before July. 



These larv;r have been figured and described by Prof. E. B. Wilson. 

 (Studies Johns Hopkins University, vol. 2). 



Both this species and the preceding are found to present peculiar 

 strings of ovarian cells attached to the ova, both when i)rojecting from 

 the ovary and when floating free in the body cavity. A description of 

 these is shortly to appear in the Journal of Morphology. 



MARPHYSA Qiiatrcfages. 



Marphysa saiiguuiea Qiiatrefases. 



Eiiiiiti xangulnca Ghuhe. Fain, des AuuM., pp. 44, r23. 



Lkidy. Joiiru. Acad. Nat. Sci. I'hil., '2d scr., part 2, vol. 3, p. 147. 

 Marphysa leidi/i Qi'ATnEFAGES. Hist. Nat. des Annel^s, vol. 1, p. 337. 

 Miupbyfia Iridi/i Vr.KRll.i,. Invert. An. Vinoyard Sd., pp. 319, .");)3, PI. xir, Fig. fil. 

 M(irphi/sa saiujniina Qua trkkai.ks. Hist. Nat. des AuneltJs, vol. 1, p. 33-J, 1*1. X, Fig. 5. 

 Marphysa saiifluinea Eiilers. Die Bordtenwurraer, p. 360, PI. xvr, Figs. 8-11. 

 Marphysa sanyuina Webster. Aunel. Cbiet. Virgiuiau Coast, p. 36, PI. vi, Figs. 

 76-dO; PI. VII. Figs. 81-S3. 



