NO. 1 HARTMAN : POLYCHAETOUS ANNELIDS 179 



Bay measures 240 mm long, 1.5 mm wide, and consists of about 800 

 setigers; it is thus a much slenderer species than D. falcata (below). The 

 prostomium is almost equitriangular in shape, lacks eyespots (pi. 13, fig. 

 302). Parapodia are short, tiny, but the postsetal lobe throughout is 

 longer than the presetal one. In anterior parapodia (pi. 13, fig. 297) 

 there are 3 or 4 superior limbate setae and a heavy, yellow, projecting 

 aciculum (pi. 13, fig. 301); in posterior segments the parapodial parts 

 are similar (pi. 13, fig. 298), but the setae are more broadly limbate and 

 the aciculum is slenderer (pi. 13, fig. 300). 



Mandibles are totally lacking. The maxillae have long, very slender 

 carriers with a broad, unpaired piece over half as long (pi. 13, fig. 299) ; 

 forceps have a strongly curved fang and about 6 teeth at the base; max- 

 illae II have 6 teeth on either side, maxillae III and IV have each a 

 single tooth ; a fifth one is lacking. 



Distribution. — D. nuda is known from Monterey Bay, California, 

 south to Pacific Panama ; usually it is intertidal ; the greatest bathymetric 

 record (above) is 69 to 79 fms. 



Drilonereis falcata Moore 



Moore, 1911, pp. 298-299, pi. 20, figs. 150-154. 



CollectiQns.-^2>A-?>l (1); 879-38 (2); 892-38 (1); 1009-39 (1); 

 1010-39 (1); 1133-40 (1); 1435-41 (1). 



This is a much more robust, thicker species than Z). nuda (above). 

 The mandibles are short, broad. Maxillae have forceps with strong, fal- 

 cate end and numerous teeth at the base, differing therein from D. filum 

 (below). Maxillae II have numerous teeth along the cutting edge of a 

 long, slender piece; maxillae III have one longer and 4 or 5 smaller 

 teeth proximally. Acicular spines are yellow, those in posterior segments 

 slightly bent distally. Posterior postsetal lobes are somewhat prolonged 

 and directed obliquely upward. 



D. falcata has been known only through its original account. Monro 

 (1933, p. 88) suggested its identity with D. filum (below), but there are 

 differences, especially in the proboscidial armature. 



Distribution. — Originally described from Monterey Bay, California, 

 the present records extend the range through southern California, south 

 to Lower California and western Mexico; it is intertidal to depths of 

 49-172 fms. 



