646 A. E. Verrill — Turhellaria^ Nemertina, and 



Posteriorly the setae ai-e nearly the same, but the uncinate seta is 

 more strongly bidentate. 



Color in formalin, plain yellowish white and strongly iridescent* 

 The largest specimen is a female filled with large white eggs. It 

 has lost its posterior segments. The anterior portion, with 30 

 setigerous segments, is 9'"™ long ; 2™™ broad ; young ones of 80 

 segments are 16'"°^ long. 



Paramarphysa obtusa, sp. nov. 



Long and slender, widest anteriorly, attenuated posteriori}^, with 

 rather prominent parapodia and long setae in the anterior region, 

 and much smaller ones posteriorly. Head ^ broader than long, 

 evenly obtusely rounded in front, with a faint median furrow, or 

 slightly bilobed in front, according to the mode of preservation. 



Antennae smooth, rather short, the three median subequal, often 

 fusiform and slightly tapered distally, or slightly clavate and 

 obtuse ; the median one is about twice the length of the head ; inner 

 laterals scarcely \ shorter; outer laterals \ shorter. Eyes large, 

 black, reniform. Buccal segment rather longer than head, scarcely 

 distinct from the next. Dorsal cirri rather short, tapered, the first 

 very small. 



The posterior third becomes very slender, with rather long and 

 almost moniliform segments and small parapodia, with conspicuous 

 black acicula. Caudal cirri small, about as long at the diameter of 

 the anal segment ; median cirrus minute papilliform. 



The 1st buccal segment is nearly as long as the head, and ^ longer 

 than the second segment. 



The 2d buccal segment is rather closely united, with the first and 

 witli the succeeding 1st setigerous segment, with shallow constric- 

 tions, but farther back, the segments are convex with well-defined 

 constrictions between them. The 1st pair of parapodia are small 

 and only slightly prominent, with few and short setae, and a small 

 papilliform dorsal cirrus, smaller than the ventral, but they rapidly 

 increase in size and prominence, in the thoracic region. Posteriorly 

 they again become small, with paj)illiform cirri. The jaws are well 

 developed but mostly pale horn-color. 



Capillary setae 4-6 anteriorly, 2-4 posteriorly, flattened distally, 

 with long, slender pointed tips. Compound setae 6-8 anteriorly 

 rather large with short blades, minutely bidentate at the extreme 

 tip, not incurved. Uncinate seta of the middle and postei'ior 

 regions, large, black, strongly curved distallj^, at the neck, and with 



