%9ll''] PROCEEDINGS OF THE NATIONAL MUSEUM. 293 



Scoloplos fragllis Verrill. 



J t}{hoxtoma fragile Veruii.l. Invert. An. Vineyard Sd., pp. 314, 598,599. 

 AnthoHtoma Jrayile Wehstkk. Annel. Clia-t. Virj;iiiian Coast, p. 58. 

 Scoloploa/nu/ilin Veukii.l. New EQ(;;land Annelida. Pt. i, p. '287. 

 ScoJopJo8 fran'ilis Wehstkr. AnnoL Ch.-ct., Provincetown, p. 724. 



Les.s abundant tliaii preceding species. 



Family CAPITELLID^. 



NOTOMASTUS Sar.s. 



Notomastiis latericius Sars. 



Saus. Fauna litteralis Norvofjia", i)art 2, p. 9-l"J, PI. ii, Fij^s. 8-17. 



QUATREFAGES. Hist. nat. des Auneles, vol. 2. p. 258. 



HoRST. Anneliden der Fahrteu des " Willem Barents," > Niederlaud. Archiv. f. 



Zi.rd.. Slip. I, p. 20. 

 Verrill. iirii-f contriimtioas from Mus. of Yale College, No. 23, > Amer. Jour. Sci. 



, Art., vol. .5, p. 101. 

 Lanueruans. Die Wurmfauna von Madeira, iv. > Zeitt. f. wiss. Zool., vol. 40, 



pj). 2.'>'.», -jr.o. 



Tlie Beaufort specimens referred to this species are -4 centimetres in 

 length and about 1 millimetre in diameter, and appear to belong to 

 this rather than to any other described form, though the tori are less 

 marked than in the figure given by Sars. Found in muddy sand, Shark 

 Shoal and Crab Point. 



DASYBRANCHUS Grube. 

 Dasybranchus caducus Grube. 



DasymaUus cadncua Grube. Hoscbreibuns uener oder wenig bokauuter Auneliden. 



> Archiv. f. Naturgsch., 1846, p. 161, PI. v, Figs. 3, 4. 

 Daiiyhr(Vi(lni>i cailncHS GrcBB. F'ani. d. Anneliden, i>. 76. 

 Dnsybranchiia caducus (iUATUKKAGES. Hist. nat. des Annelds, vol. 2, p. 258, 640. 



The specimens referred to this species agree essentially with Grnbe's 

 description of D. cadncus. There are thirteen somites bearing capillary 

 seta' and ramose branchiae on many of the somites of the posterior 

 region, but not apparently upon the more muscular anterior somites of 

 that region, though in alcoholic specimens the branchia' are often con- 

 tracted or absent in part. Grube describes two S{)ecies of Dasi/braiichiis 

 with no branchia' and separates this genus from Xoiomastufi merely by 

 the number of somites in the anterior region {Annulafa scmperiana). As 

 the last two somites of the anterior region belong in general appear- 

 ance to the posterior region rather than to the anterior, the character 

 of the seta^ alone remains as a distinguishing mark, which seems 

 scarcely of generic importance here. 



This Annelid is found with the preceding, and more commonly than it. 



