Annelida Ch^etopoda of New Jersey. 123 



Notomastus filiformis Verrill.* 



PLATE V, FIGS. 51-54. 



Invert. An. Vin. Sound, etc., p. 611. 1874. 



Head very small, pointed, conical. 



Proboscis apparantly smooth ; when magnified seen to be covered with minute 

 papillae. 



First five setigerous segments with capillary setae in both rami, not differing 

 from each other, arranged in each ramus in a single transverse series, contain- 

 ing from eight to twelve setae. After the fifth segment uncini only are found. 

 At first the uncini are quite long (fig. 51), but few in the dorsal rami, from 

 eight to twelve in the ventral; they grow progressively shorter backward (figs. 

 52, 53;, and along the posterior third their number is much reduced, there 

 being one to three in the dorsal rami, three to five in the ventral ; a few of the 

 posterior segments may be without setae. The form of the uncini changes, as 

 shown in the figures. 



The anterior segments are biannulate, afterwards crossed by from three to five 

 deeply impressed lines. 



The anal segment is obliquely truncated ; margin thickened and rounded 

 (fig. 54) ; from its lower border projects a finger-shaped cirrus, which is dis- 

 tinctly annulated. (A similar cirrus exists on N. luridus Verr., Ancistria 

 minima Quatr., and on several as yet unpublished species from Beaufort, N. C. 

 I do not know that this cirrus has been previously described as belonging to this 

 genus, or to any in the Family.) 



Color : red to purplish-red in front ; flesh-color to bright red behind. 



Length very variable; greatest diameter of largest specimen 1.2 mm . 



Common ; low water to fifteen feet. 



Notomastus luridus Verrill. 

 Invert. Animals of Vineyard Sound, etc., p. 610. 1874. 



Rare ; only one specimen was taken. 



Young forms of Notomastus ? 



(a). One specimen, evidently immature, had capillary setae only on the first 

 four segments, then uncini only ; but about the middle of the body the dorsal 

 uncini were replaced by capillary setae. Posterior segments lost. 



(b). Another form, of which several specimens were found, had capillary setae 

 in all the dorsal rami, uncini in all the ventral. Length of (a) and (b) 10-20 mm . 



Found in shells bored by sponge ; low water to fifteen feet. 



Fam. MALDANID^. 



CLYMENELLA. Verrill. 



Invert. Animals of Vineyard Sound, p. 607. 1874. 



Clymenella torquata Verrill. 



Clymene torquata Leidy. Marine Invert. Fauna R. I. and N. J., p. 14. 1855. 

 Clymenella torquata Verrill. Op. Cit. p. 608, pi. xiv, figs. 71-73. 1874. 



" " Webster. Annel. Chset. of the Virginian Coast, p. 258. 1879. 



Very common in sand at low water. 



* I regarded this as a new species, and gave it the specific name of Icevis ; but on submi ting 

 specimens of the same form, taken at Province town, Mass., to Prof. Verrill, he referred them 

 to his X. filiformis. 



