126 PROCEEDINGS OF THE ACADEMY OF [1899. 



thecal pores are between the levels of the ventral and dorsal setae 

 bundles. 



Equally conspicuous in preserved worms are the often partially 

 everted male genital bursse, which appear as a pair of prominent 

 papillse (penes) on the ventral face of somite XII (figs. 1 and 

 2, c?). At their apices are the male pores — triradiate slits 

 with two short mesial limbs and a longer octal one (fig. 1). 

 When the bursie are not everted, the male pores have the form of 

 transverse slits on slightly elevated papilla?. The female port's 

 (figs. 1 and 2,9) are very small, and are found only with some 

 difficulty in entire worms. They are in line with the male pores 

 and situated at the intersegmental furrow XII-XIII. The general 

 characters of the anterior end of the worm are shown in figs. 1 

 and 2. 



The setie have the form usual in the genus, being feebly sigmoid 

 and arranged in fan-shaped bundles, but are mostly imperfect, 

 owing to the points being worn or broken off. The dorsal (lateral) 

 bundles contain usually two, sometimes three, the ventral three to 

 six in the preclitellial region, and usually four or five behind the 

 clitellum. The ventral bundles are more conspicuous, not only 

 because of the greater number of set?e which they contain, but 

 also because these setse are of somewhat larger size than the dorsal 

 ones. Enlarged set<ie are found in the ventral bundles of XI ; these 

 are about one-third longer and much thicker than the others. Setae 

 are absent from somite I, and the ventral bundles normally from 

 XII. On the latter the ventral bundles are partially replaced by 

 groups of pigmented glandular cells Avhich lie ectad to the male 

 pores. Sometimes a single small seta persists in this region. The 

 dorsal bundles are sometimes also reduced on this somite and may 

 be represented by tAvo setae, by one seta, by the pigmented glands 

 or have disappeared altogether (as in one series of sections). 



A very striking peculiarity of the species is the yellow-brown, 

 deep chocolate-brown or almost black color, and its opacity. Mr. 

 Bryant informs me that the worms were quite as conspicuously 

 colored in life. Several of the specimens are marked by more or 

 less complete wdiite or yellow rings which are the result of ruptures 

 of the epidermis along the intersegmental furrows, permitting the 

 underlying muscular layer to show through. As Mr. Bryant states 

 that these bands w^ere present when the worms were collected, the 



