306 CALIFORNIA ACADEMY OF SCIENCES. 



diverticula, while in two other specimens the diverticu- 

 lum was three lobed as already described. The question 

 will arise if we have not two distinct species before us, 

 but until more material is at hand no definite answer can 

 be given. 



S-perm-sacs (figs, i and 27). There are generally only 

 two sperm-sacs, which may prove to be paired. One pair 

 in somite x and one in xi; both are very largefilling the 

 whole available space in the somite. The body of the 

 sperm-sac is situated principally in the upper part 

 of the somite above the hearts and the body-wall. The 

 sides of the sacs in somite x are thinner and project down- 

 wards, ending in a narrow tube which connects with the 

 testes in exactly the same manner as in Ocnerodrilus. 

 The sperm-sac in somite x is generally smaller than the 

 one in xi. The latter is divided on each side into two 

 large lobes, the anterior of which is the largest, both 

 being almost globular at least when seen in a longitudi- 

 nal section of the body. The under part of this sperm- 

 sac is very much lobed and does not connect with the 

 testes. The size of the sperm-sac is of course variable. 

 There is no sperm-sac in somite xii, nor is there any in ix. 

 One specimen possessed a small sac in xii. 



Ovary (figs, i and 8). The ovary is situated as usual 

 in somite xiii and is of the common form and size found 

 in Ocnerodrilus. It is attached to the septum close to the 

 body-wall in line with the inner couple of set£e. The inner 

 matrix is palmate. 



The oviduct is situated immediately behind the ovary 

 and the funnel is entirely free of the septum. It is very 

 large, deeply divided or lobed, the lobes clasping the 

 ova almost as a pair of forceps. The ovipore is as usual 

 situated in somite xiv, in front of the inner couple of set^e. 



Two spertn ducts and ciliated rosettes (figs, i , 23 and 27) . 



