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PROCEEDINGS OF THE NATIONAL MUSEUM 



VOL. sa 



anterior end to between anterior eyes; provided with four widely 

 separated eyes with lenses. 



Antennae (fig. 52, a) almost contingent at their inner bases; about 

 half as long as prostomium ; directed forward. 



Palpi stout, subcylindrical, with a transverse groove at distal 

 third (fig. 52, a) ; palpostyle spherical, about half as wide as distal 

 end of palpode. 



Peristomium (fig. 52, a) dorsally about as long as segment 2, con- 

 vex at anterior medial margin ; slightly wider than segment 2 ; pro- 

 duced ventrally to form a strongly grooved lower lip, its posterior 

 margin convex; peristomial cirri elongated, the cirrophores almost 

 half as long as the, palpi, transversely wrinkled; styles smooth, the 

 longest reaching to eighth setigerous segment, the shortest beyond 

 the palpostyle. 



Figure 52. — Nereis (Neanthes) saltoni, new species : a, rrostomium and peristomium In 

 dorsal view, X 12 ; b, tenth parapodium in posterior view, X 21 ; c, fortieth para- 

 podium in anterior view, X 21 ; d, falcigerous neuroseta from median parapodium, 

 X 222. 



Paragnaths numerous, black, mostly small well-separated pointed 

 cones, the largest present on areas II, V, and VI; area I with one 

 to four medium-sized blunt cones; area II with an oblique patch of 

 about 15 teeth disposed in three rows; area III with a broad rec- 

 tangular area of 20 to 25 smaller teeth; area IV with an irregular 

 crescent of 15 to 20 cones intermediate in size between those of areas 

 II and III ; area V with one to five pointed cones ; area VI with a 

 rounded heap of 10 to 13 pointed cones; area VII to VIII with a 

 continuous band of pointed cones in two or four irregular rows, most 

 cones ventrall}^ Jaws thin, horny brown, with about eight teeth. 



Parapodia (fig. 52, 5, c) with elongated, fingerlike, equal or sub- 

 equal lobes, except for the dorsal lobes, which are over twice as 

 wide as the ventral lobes throughout length of body ; posterior para- 

 podia relatively longer and slenderer; dorsal lobe characteristically 

 with its distal portion approximating in shape an equilateral tri- 

 angle; dorsal cirri extending distalljr to beyond middle of dorsal 

 lobe (fig. 52, «, 1)). 



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