BY J. J. FLETCHER. 
1545 
the anterior margins of viii and ix, opposite the setfe of the inner- 
most rows. Accessory (supposed) structures comprise (1) between 
X and XI a pair of oval sucker-like depressions with raised rims 
involving the posterior annulus of ix and the anterior one of x, their 
inner margins sometimes confluent in the median line, extending 
outwards a little beyond the second sette ; a similar pair bet sveen 
XVI and xvii ; and two similar but smaller pairs between xix and 
XX, and xx and xxi, but sometimes only one but either of these 
developed ; in addition sometimes there are indications of another 
pair between xv and xvi sometimes on one side and sometimes on 
the other : the first and second pairs of the above-mentioned are 
very constant, and are visible in young worms and these without 
girdles ; the othex’s ai’e usually only noticeable in breeding worms 
and in these there is considei’able variation in detail of pattern 
and amount of tumidity, so that sometimes they are depressions 
with raised and tumid rims, or the centi’al portion of the depres- 
sion may be raised, or they may become papillae. In addition a 
pair on xvii (usually obscured by girdle if developed) or on xviii. 
Nephridiopores three pairs to a segment except the first few, oix 
the anterior margins of the segments opposite the first (or exception- 
ally on one side of the body opposite the second), third, and foiu’th 
setae, in the last case first visible on segment iii ; the other two 
pairs in my specimens first visible on vi or vii. 
Dorsal pores commence after about segment xi. 
Alimentary canal ; gizzai’d in v ; dilatations of the alimentary 
canal in some of the segments from about viii, especially in xii- 
XIV, but there are no pairs of })Ouches ; large intestine begins in 
XVI ; a typhlosole appears to be present. 
Genitalia : two pairs of vesicuhe seminales in ix and xii; testes 
and ciliated rosettes in x and xi ; prostates incised glands occui)y- 
ing 3 segments; spermathecie two pairs in viii and ix, each with 
a distinct but short single csecum attacheil to the short duct a 
little above its exit. Corresponding with the sucker-like depres- 
sions there are internally white glandular masses. 
