NEW SPECIES OF OCNERODRILUS. 253 



of about the same size as in other species. As regards 

 the lobing of the glands, it resembles that of O. Roses, 

 that is the glands are almost entire, but the relative size 

 of the gland is very different from what is the case in 

 that species. In O. Roscv the gland in somite vii is much 

 larger than the one in somite viii while it is of nearly 

 the same size as the one in somite vi. From Ocncro- 

 driliis guatemalcB which this species resembles perhaps 

 more than any other, it is distinguished by more entire 

 septal glands, by a smaller spermatheca, etc. 



The sepermatheca is very small, about as long as the 

 diverticulum of the oesophagus is wide. It is contracted 

 on two places and greatly resembles the same organ in 

 O. I i mi CO la. 



The spenn-sacs occur in ix, x, xi, xii. The one in somite 

 ix, as usual, situated principally above the diverticulum, 

 is very large, filling the whole of the upper part of the 

 somite. It is entire, not lobed. The sperm-sacs in x are 

 smaller, or even absent, but the one in vi is again very 

 large, occupying a large part of the respective segment. 

 The one in xii is situated as in the other species, and is 

 deepl}^ lobed, but as regards size is much smaller than 

 the one in somite xi. In O. sononp the sperm-sac in 

 somite xii is very large. 



The prostate gland is short, running through about two 

 somites. The muscular part is very small and the lower 

 part of the sperm duct is not enlax'ged. The specimen 

 being much macerated, I am not able to give a very ac- 

 curate description of these organs. There is a very small 

 zone around the male pore, partly extending ventrally. 

 The inner couple of seta^ in somite xvii is wanting (fig. 

 72). 



As regards the size of the prostate, O. Hendr iei dnd 

 giiatemalcB resemble each other more than they do other 



