468 FRANK E. BEDDARD. 



The 5tli segment is the first which shows the commencing 

 formation of annuli. A slight furrow crossing this segment 

 partially divides it into two rings ; the seise are implanted just 

 in front of this furrow. 



The 6th ring is similar to the fifth, only that it is slightly 

 longer. 



The 7th ring is broader stilly and is divided by two furrows 

 into three annuli, the setae being conspicuous upon the middle 

 one of the three. 



The 8th to the 14th segments are very broad, and each is 

 divided by four furrows into five annuli, of which the middle 

 one carries the setse. 



The 14th segment, though of equal diameter to those 

 preceding it, has only three furrows ; but there is an indica- 

 tion of the fourth. 



The 15th and 16th have three annuli each. 



After this point I cannot give accurate details, as the ridges 

 which carry the male generative pores have introduced altera- 

 tions into the annuli of the neighbouring segments. 



Clitellum. — I am unable to map exactly the boundaries of 

 the clitellum, as it did not appear to be fully developed. 



On dissection, only two segments (15 and 16) showed a 

 very marked diff"erence in the structure of the body-wall from 

 the others ; here the deep yellow colour was very apparent, and 

 was fully as well developed on the ventral as on the dorsal side. 



The genital orifices, as already stated, are borne on two 

 longitudinally running ridges, coinciding in position with the 

 ventral series of setae on each side. 



These ridges, particularly in the immediate neighbourhood 

 of the male pores, had a very glandular appearance. It is quite 

 possible that the clitellum Avhen fully developed extends as far 

 as these ridges do. 



In that case it may be stated provisionally that the clitellum 

 extends over four segments (viz. 15 — 18). 



It will be noted, however, that the clitellum difi'ers in its 

 anterior and posterior regions. The first two segments are 

 entirely invaded by glandular substance, while the three posterior 



