BY J. J. FLETCHER, M.A., BS.C. 965 



side of the nerve cord, then curving round the intestine touching 

 superiorly in the median line. The posterior pair are larger, more 

 compressed, and each distally drawn out into a narrow prolongation 

 usually folded on itself, and slightly dilated at the tip ; these bodies 

 are attached by fibrous bands and a stalk to the anterior mesentery 

 of xn, on each side of and slightly below the intestine. I could 

 find no ciliated rosettes either in x or xii, but there is a single pair 

 in XI, enclosed within the backwardly prolonged basal portions of 

 the anterior sacs, which continue along the floor of the segment on 

 either side of the nerve cord to the posterior mesentery, through 

 which apparently the contents of the posterior sacs gain access to 

 the ciliated rosettes. In one specimen I noticed a pair of small 

 white bodies attached to the anterior mesentery of xi, but enclosed 

 within the sacs, which were probably testes. The presence of 

 a single pair of ciliated rosettes — unless I have overlooked a pair 

 which I do not think is the case — is similar to what Horst has 

 described in P. Sumatrana (1). 



There is a pair of large tabulated prostates incompletely divided 

 into three lobes, occupying pait of from two to four segments (xvin 

 to xxi) on each side ; the prostatic ducts come off from the middle 

 portions ; the posterior portions of the vasa deferentia were not 

 traceable in the two soft specimens available for dissection ; the 

 genital ducts are rather short, straight or bent but not coiled. There 

 is a pair of flattened ovaries occupying the usual position in xiii ; 

 the oviducts appeared to be as usual ; there are four pairs of 

 spermatheca?, a pair in each of segments v to viii. Each 

 spermatheca is a stalked pouch, the stalk or duct about half as long 

 as the distal dilated portion, and giving off a very short and rudi- 

 mentary csecum from its upper part. The whole ventral wall of the 

 body cavity from segments xvii to xxn is specialised, but separate 

 glandular pouches were not noticeable. 



There are transverse hearts in segments viii to xn ; in front of 

 viii the dorsal vessel runs along the top of the gizzard ; there are 

 smaller commissural vessels in vi and vn ; in xn below the main 



(1) Notes from the Leyden Museum, Vol. v. p. 189. 



