[23] ANNELIDS OF PEOVINCETOWN, MASS. 721 



DRILONEREIS Claparede. 

 Drilonereis longa Webster. 



Aunel. Chaet. of the Virginian Coast, etc., p. 240, pi. vii, figs. 84-88. 1879. Annel. 

 Ch£Bt. of New Jersey, p. 116. 1880. 



Quite abundant in sand at low water. 



ARABELLA {Orube) Ehlers. 

 Arabella opalina Yerrill. 



iMnibriconerm aplendida Leidy. Marine Invert. Fauna of R. I. andN. J., p. 10. 1855. 

 Lumbriconereis opalina Veriiill. Invert. An. of Vin. Sound, p. 594, pi. liii, figs. 69, 70. 



1874, 

 Arabella opalina Verrill. Proc. Acad. Nat. Sciences, Philadelphia, for 1878, p. 299. 



Webster. Annel. Chajt. of the Virginian Coast, p. 242. 1879. An- 

 nel. Chait. of New Jersey, p. 116. 1880. 



Very common at low water in sand. 



STAUROCEPHALUS (Grube) Ehlers. 

 Staurocephalus pallidus Verrill. 



Vkrrill. Invert. Animals of Vineyard Sound, p. 595. 1874. 



Webster. Annel. Chiet. of the Virginian Coast, p. 242. 1879. Annel. Chset. of New 

 Jersey, p. 116. 1880. 



Very rare. Only two specimens were taken. Sand ; low water. 

 Staurocephalus o^cus n. sp. 



(Pl. IV, Figs. 44,44a-48.) 



The head of this species is constricted just in front of the origin of 

 the antennae, the widest part being back of the antennae, where the width 

 exceeds the length; the anterior part is regularly curved, obtuse (fig. 

 44). There are no eyes. 



The antennae are quite long, composed of about fifteen articles ; in- 

 creasing slightly in diameter from origin along the inner third, then 

 tapering graduallj- to the end ; the last three or four articles elongated. 



The palpi are stout, tra^^sversely wrinkled, canaliculate ; terminal 

 article fusiform, bluntly rounded at apex, forming nearly one- third the 

 entire length. 



The first two segments are about equal in length, a little longer than 

 those following them. 



The dorsal cirri (fig. 45) have a terminal article shaped like the cor- 

 responding part of the palpi ; they are nearly cylindrical, reach just 

 beyond the foot. 



The ventral cirri are short, fusiform, arising near the apex of the foot 

 and reaching a little beyond it. 

 S. Mis. 110 46 ' 



