Annelida of the Bermudas. 647 



a large angular hook, stouter than the acute terminal denticle ; 

 absent anteriorly. Aciculum posteriorly large, black, spiniform, 

 subacute ; paler and more slender anteriorly. 



Color, in formalin, white. Length, 25-35"'° ; diameter, 1-1.25'°'". 



Flatt's Inlet, at low-tide, in shell-sand. Several specimens. 



P. longida Ehl. differs from this in having a distinctly bilobed 

 head ; much longer antennae, straighter and less hooked uncinate 

 setse, fewer and more slender capillary setae, longer and more 

 strongly bidentate blades to the compound setae, and shorter jaws. 



Nematonereis hebes, sp. nov. 



Body long, slender, terete, with rather long, and posteriorly with 

 only slightly constricted segments ; often coiled in a spiral. Head 

 broadly rounded in front, nearly hemispherical, rather broader than 

 long. Eyes small, black. Antennae fusiform, swollen above the con- 

 stricted base and gradually tapered to the acute tip, nearly as long 

 as the head. First buccal segment about as long as the head, the 

 second about half as long and about equal to the next. The 

 divisions between the two buccal rings and several following seg- 

 ments is very slight. Dorsal cirri on the 1st segment are small, 

 papilliform; on succeeding segments they are longer and tapered, 

 the longest about ^ as long as the breadth of the body. The longest 

 anterior parapodia are quite prominent, with a short, thick ventral 

 cirrus, with a swollen base, a large setigerous lobe, and a long 

 dorsal cirrus. There are 2 or 3 long, slender, slightly flattened 

 capillary setae ; a few compound setae with narrow, feebly bidentate 

 blades; a slender, j^ellow, spiniform aciculum, and farther back an 

 uncinate seta with a strongly recurved neck and a strongly biden- 

 tate tip; the hooked lateral tooth is larger than the acute terminal 

 one, and angular, much as in Paramarphysa ohtusa. Color, in 

 formalin, pale greenish white. 



Length, 25-30""°, in formalin ; diameter, about .3'°'°. • Three 

 specimens. 



Stauronereis, nom. noY .=:Anisoceras and Stau^-ocephalus Gr. (preoc.) 



Type Staurocejjhalus RudolpMi (D. Cli.) Elilers, Borstenw., p. 434, pi. xviii, 



figs. 17-26. 

 Anisocer-as Grube, Vid. Meddel., p. 60, 1856 {non Pictet, Cephal., 1854). 

 Staurocephahis Grube, Zeitsch. fur Wiss. Zool., 1855, p. 97 {non Barr., Cnist., 



1846). 



The name Staurocephalus must be dropped, because clearly pre- 

 occupied in Crustacea, 1846. Anisoceras, which Grube originally 

 considered a distinct genus, but which Ehlers and others have 



