10 



E. NOMURA : 



Something similar may also be seen in the present species, hut the 

 granules are always of the same type and size in all developmental 

 stages, and I can not assert the existence of any positive relation- 

 ship between the corpuscles in question and the peritoneal cells. 



2. Hetm and Seta-bunöles. 



The setœ are sigmoid, nodulate and bifurcate in general at 

 their distal ends, but the ventral ones (fig. 0, 2 r ) in the second 

 segment are simply pointed. The nodule is very smooth and lies 

 in most setœ at from two-thirds to five-sevenths of the setal 

 length from the proximal end, but at about the middle of the 

 whole length in the ventral setae of the second segment. The 

 nodule stands at the bottom of an (apparently) invaginated tube 

 of the cuticular layer which closely invests the seta and reaches 

 to the inner surface of the hypodermis, where it ends and 



is attached to the 

 thickest portion of 

 the nodule (fig. 8). 

 The furcate branches 

 of an ordinary seta 

 are both compara- 

 tively small, so that 

 the span of the 

 branched tip is not 

 particularly ex- 

 panded, and the 

 upper branch is 

 generally shorter 

 than the lower. One 

 or more slit-like vacuities are often found in the nodulated portion 

 of larger setae, running along the long axis (fig. 0, 5 and 5'). The 



Fig. 6. 



Setse. x 350. 2-5, the largest of the dorsal setre, and 

 2'-5', the largest of the ventral seta? of the corresponding 

 segments. 



