104 W. BLAXLAND BENE AM. 



ment spots at the level of the chaetse^ giving the impression 

 at a casual glauce that the cheetse are in a circle round the 

 body. A similar style of pigmentation has been noted by 

 Michaelsen in the case of B. affinis and others. 



The dorsal pores are large and conspicuous, commencing 

 after the 4th segment ; as usual these are absent (or obliterated) 

 in the clitellar region. When the animal was handled a con- 

 siderable quantity of a brown fluid issued from the pores. 



The chsetse, which appear as black dots, have the usual 

 arrangement, and present no pecularity of shape or ornamen- 

 tation. They are invisible, if indeed they are present, in the 

 2nd segment. As I had only one specimen, which had to be 

 returned to the British Museum, I could not, of course, examine 

 the body-wall microscopically. The four couples are equi- 

 distant from one another, being about 2 mm. apart. Some 

 of the anterior segments, except the first three, are biannu- 

 lated, the first annulus being nearly twice as large as the 

 second, and bearing the chsetse. 



The prostomium is not dovetailed into the peristomiura ; 

 the latter is not more than half the size of the 2nd segment. 



The clitellum covers eleven segments, viz. xiii to xxiii in- 

 clusive ; the intersegmental groove is still distinct detween the 

 13th and 14th segments, but elsewhere, at any rate dorsally 

 and laterally, the limits of the segments composing the cli- 

 tellum are not recognisable, except by bauds of darker pig- 

 ment. As in all species of this genus, there is a ventral area 

 in the middle of the clitellar region which in this instance 

 presents specific characters. In Segments xiii, xiv, and xv the 

 clitellum is " complete," but in the remaining segments it ceases 

 ventro-laterally, i. e. just below the outer series of chsetae, and 

 forms a distinct margin (fig. 1, m.) limiting a more or less rec- 

 tangular depression, the " ventral field." This is wider ante- 

 riorly than posteriorly, being about 12 mm. across on Segment 

 xvii and about 8 mm. on Segment xxii. Anteriorly the ventral 

 field is bouuded by the hinder margin of Segment xv. 



Within this " ventral field " lie the four prostate pores, a 

 pair on each of the Segments xvii and xix. The two pores of 



