726 KEPOKT OF COMMISSIONER OF FISH AND FISHERIES. [28] 



Family CHiETOPTERID^. 



SPIOCH^TOPTERUS Sars. 



Spioch^topterus oculatus Webster. 



Annel. Chaet. of the Virginian Coast, etc., p. 247, pi. viii, figs. 98-102. 1879. — Annel. 

 Chset. of New Jersey, p. 118. 1880. 



We found this species in great numbers at Wellfleet. Here a great 

 area of sand-flat is exposed at low water, drained by swiftly running 

 streams. It is along the borders of these streams that this species is 

 most abundant. Often G or 8 could be obtained from a single "dig" of 

 the spade. It occured under the same conditions in Virginia and New 

 Jersey, but much more sparingly. These three localities are the only 

 ones reported up to this time. 



Family SPIONID^. 



SCOLECOLEPIS Blainville. 



ScoLECOLEPis viRiDis Vorrill. 



Vkrrill. Invert. Animals of Vin. Sound, etc., p. 600. 1874. 

 Webster, Annel. Chajt, of New Jersey, p. 118. 1880. 



Wellfleet. Eare, only one specimen taken. Sand, low water. 

 SCOLECOLEPIS ciRRATA Molmgren. 



Nerine cirrata Saks. Nyt. Mag., vol. vi, p. 207 (teste Malmgren). 

 Scolecolcpis cirrata Malmgren. Annulata Polychaeta, p. 199, pi. x, fig. 54. 1867. 

 Verrill. Invert. An. of Vin. Sound, p. 602. 1874. 



Kot common. Dredged in from 20-30 fathoms j sand. 



SPIO (0. Fahr.) Orsted. 



Spio setosa Verrill. 



Vkrrill. Op. cit. , p. 602, pi. siv, fig. 71 . 1874. 

 Webster. Annel. Chaet. of N. J., p. 119. 1880. 



Provincetown ; low water to 25 fathoms. 

 Wellfleet; low water, sand. 

 Common. 



(Spio Eathbuni, n. sp. 



(PL. V, Figs. 53-59.) 



Head oval (fig. 53), length about double the width, sides very slightly 

 convex; anterior end divided into two rounded lobes; posterior end a 

 little narrower than the anterior; the anterior third of the head, together 



