LEODICE PAURONEURATA. 251 



The parapodia are short and bluntly rounded. The dorsal cirri are acumi- 

 nate distad as usual. They are wholly smooth, showing no trace of annulations. 

 They are longest in the anterior region, where, however, they are relatively 

 but moderate, caudad becoming shorter and more slender. The ventral cirri 

 in the anterior region consist of a stout, cylindrical, proximal, division and an 

 abruptly narrower and very short, rounded, largely noduliform article. In 

 the posterior region they are much smaller, taking on first a more slenderly 

 cylindrical form with no distinct distal article, and then becoming reduced to 

 a mere nodule. 



Branchiae begin on the tenth somite and are present on all excepting the 

 last three or four somites. The first branchia consists of two equal filaments 

 springing from a short, thick, common base. (Plate 58, fig. 7). The second has 

 two filaments, of which one is bifid. The third has also two filaments of greater 

 length. (Plate 58, fig. 8). The fourth has three filaments, of which the median 

 is longer than the laterals. The fifth has four filaments springing from a more 

 elongate common stalk. The sixth and seventh have again three filaments j 

 the eighth two, and the ninth, tenth, eleventh, and twelfth, three. (Plate 58, 

 fig. 9). The thirteenth has four filaments, of which one is bifid at the tip and 

 one bears a short lateral bud below its middle. (Plate 59, fig. 1). The fourteenth 

 branchia has two filaments, the fifteenth, sixteenth, and seventeenth three, and 

 the eighteenth again but two, the nineteenth and twenty first three (the twenty 

 second missing), the twenty third to thirty first two, the thirty second one, 

 the thirty third two, the thirty fourth one, the thirty fifth to thirty ninth 

 two, the fortieth one, the forty first and forty second two, the forty third one, 

 the forty fourth to forty seventh two, the forty eighth three, the forty ninth 

 two and the fiftieth again three. From this region (fiftieth to sixtieth somites) 

 caudad the branchiae show a decrease in length which in the last branchiferous 

 somites is pronounced; most of them consist of three filaments, some of four. 

 (Plate 59, fig. 2). Thus the number of filaments varies irregularly from one to 

 four, one being least common, two and three the most conmion, the latter 

 number predominating in the caudal region. The branchiae are always shorter 

 than the cirri. 



Acicula black, stout, distally acutely acuminate and a little curved, the 

 tips freely projecting. Often transversely rugose below tip and sometimes 

 appearing to have a barb on one side. Anteriorly the acicula are two in number, 

 but in the posterior region there are often three. Dorsal acicula represented 

 as usual by a small fascicle of transparent fibers extending to base of dorsal 



