148 [Assembly 



On one specimen the head and a few of tlie anterior segments had 

 been lost and renewed, but the branchiie were still wanting. 

 Common in sand at low water. 



ScoLEcoLEPis TENUIS Verrill. 



Invert. Animals of Vineyard Sound, etc., p. 601. 1874. 



Reported by Yerrill from Great Egg Harbor, in sand at low 

 water. We failed to find it. 



SPIO (0. Fahr.) (Ersted. 

 (Eksted. Annulatorum Dauicorum Conspectus, p. 39. 1843. 



Spio 8ET0SA Verrill. 



Nerine coiiiocephnla ? A. Agassiz. Annals Lyceum Nat. Hist, of N. Y., vol. viii, 



p. 333, pi. X, figs. 39-45. 1866. (See Verrill, op. cit.) 

 Spio setosa Verrill. Invert. Animals of Vineyard Sound, etc., p. 603, pi. xiv, 



fig. 77 (copied from Agassiz). 



Verrill says of this species that the lateral lobes of the head are 

 shorter than the median ; this is true in alcoholic specimens ; the 

 reverse is the case in living forms. Common in sand at low water. 



POLYDORA Bosc. 

 Histoire Naturelle des Vers, vol. i. 1802. 



PoLYDORA HA]!^IA.TA Webstei\ 



Annel. Chset. of the Virginian Coast, p. 251, pi. viii, figs. 111-116, pi. ix, figs. 

 117, 118. 1879. 



Common, living in galleries in shells. From low water to fifteen 

 feet. 



POLYDORA LIGNI ;i. Sp. 

 PLATE (v), viii, FIGS. 45-47. 



Head deeply emarginate in front, lateral lobes blnntly rounded 

 (fig. 45), pointing forward and outward ; lateral margins, in front 

 and back of the eyes, concave ; opposite the eyes (middle third) 

 convex ; a rounded carina runs back to the middle of the fourth 

 segment ; at the front margin of the third segment this carina bears 

 a small conical papilla, always distinct, even on the smallest speci- 

 mens. 



Eyes four, black, circular, placed at the angles of a trapezoid ; 

 anterior pair larger than posterior. 



Tentacles short, with the usual structure, colorless, ^vithout mark- 

 ings. 



Dorsal cirri, long and stout on the anterior segments, smaller on 

 those having branchiae. 



