230 U.S. NATIONAL MUSEUM BULLETIN 227 



3. Maxillae 4 pairs (fig. 69f). Prostomium (fig. 69, a,b) without antennae (may 



be 3 minute ones), without distinct palps (with pair of ventral buccal 

 cushions which may represent poorly developed palps). Two apodous 

 tentacular segments, without tentacular cirri. Without dorsal or ventral 



cirri (fig. 69, c,(i) Lumbrineridae (p. 256) 



Maxillae Z^i to 5}^ pairs (right maxilla iii missing; fig. 64/). Prostomium 

 with 1 to 5 dorsal occipital antennae, 2 globular ventral palps (fig. 64,a,6). 

 With or without single pair tentacular cirri. With dorsal and ventral cirri 

 (ventral cirri may be short, globular in middle and posterior segments) . 4 



4. Prostomium with 2 frontal antennae and 5 dorsal occipital antennae, the 



latter with more or less conspicuous ringed bases or ceratophores (fig. 

 64,o,6). Single apparent tentacular or buccal segment (first segment per- 

 haps fused with prostomium) Onuphidae (p. 243) 



Prostomium without frontal antennae, with dorsal occipital antennae (1, 3, 

 or 5), without ringed ceratophores (fig. 62a). Two apodous tentacular 

 segments Eunicidae (p. 234) 



5. Dorsal cirri rudimentary or lacking. Two apodous tentacular segments. 



Prostomium without antennae (fig. 71a) Arabellidae (p. 268) 



Dorsal cirri large, flat foUaceous. Tentacular segments 1-2. Prostomium 

 with 3 short to minute antennae at posterior margin (may be hidden by 

 tentacular segment) Lysaretidae (not represented) 



Family Dorvilleidae ( = Staurocephalidae and Stauronereidae) 



Representatives are usually small to minute in size, composed of a 

 moderate number of segments, slender, cylindrical, or fusiform. 

 Prostomium suboval to subpentagonal, with a pair of dorsal more or 

 less articulated antennae and a pair of lateroventral palps, usually 

 rather long (fig. 60a) or both simple, minute and subequal (in Ophryo- 

 trocha), with or without eyes (0, 2, or 4). First 2 tentacular segments 

 apodous, without tentacular cirri. With short subulate dorsal and 

 ventral cirri. Anal cirri 2, 3, or 4. Without branchiae. Parapodia 

 essentia^ uniramous. Notopodium may be represented by acicula 

 within the cirrophores of the dorsal cirri (fig. 606). Neuropodia with 

 upper group of simple setae and lower group of compound setae. 

 Portions of the body may be ciliated, as segmental transverse bands 

 along bases of parapodia and cirrophores of dorsal cirri. 



Proboscis eversible, with a pair of dark ventral mandibles (fig. 60e) 

 and numerous small, paired maxillary plates arranged in longitudinal 

 series (fig. 60/). The dark jaws may be seen through the body wall in 

 living specimens. 



The dorvilleids are small, wandering, carnivorous, occurring mostly 

 between the tide marks or in shallow water. They secrete abundant 

 mucus and burrow in sand and form temporary tubes beneath the 

 stones (Moore, MS.). Sexual maturity is attained without meta- 

 morphosis so far as is known. 



Contains only one New England genus. 



