NEW SPECIES OF OCNERODRILUS. 273 



r. Sperniatbeua vei-y minute, withoiit constrictions or trace of di- 

 verticula. The anterior septal gland only slightly larger than 

 the one in somite vi. The prostate not unsually small. 



O. SONORiE. 



2. The inner couple of setae in somite xvii is wanting. 



d. Spermatheca cylindrical, contracted, but with no diverticula. 



The septal gland in somite vii almost equal in size to the 

 one in somite viii. One connecting vessel in somite ix. The 

 prostate very small. O. Hendriei. 



3. The inner couple of setaj in somite xvii is present. The lower 



part of the prostate is muscular and much differentiated from 

 the upper glandular part. 



e. One connecting vessel in somite ix. Spermatheca with a few 



wartlike and rudimentary diverticula. The septal gland in 

 somite vii much larger than the one in somite viii. 



O. LIMICOLA. 



II. Spermatheca present in somite xi, with no diverticula. Lower part 



of the sperm duct with a large shuttle-like enlargement close to 

 the male pore. 

 /'. Spermatheca very large, globular, much wider than the ossoph- 

 ageal diverticulum. Sperm-sac in somite ix very large, lobed. 



O. AGRICOL.V. 



g. Spermatheca long, cylindrical, not as wide as the width of the 

 (esophageal diverticulum . Sperm-sac in somite ix very small, 

 deeply lobed. O. Kos;e. 



k. Spermatheca medium, cylindrical, narrower than the width of 

 the diverticulum of cesophagus. The sperm-sac in somite ix 

 very large, not lobed. O. contractu.s. 



III. Spermatheca present in somite viii, with no diverticula. No en- 



largement of the lower part of the sperm duct. 

 /. Spermatheca sac like, with no diverticula. Sperm-sacs in ix and 

 xiinot lobed. O- Eiseki. 



IV. No spermatheca; no enlargement of the lower end of the sperm duct. 

 j. The septal glands in somites v, vi, vii and viii of nearly equal 

 size. No sperm-sacs in ix, x, and xii, and those in xi very 

 small. The inner couple of seta? in somite xvii present. 



O. OCCIDENTALS. 



DiOGNOSES OF THE SpECIES. 



Ocnerodrilus Beddardi, n. sp. 



Clitellum xiii to xix. No ventral zone in xvii. One seta 

 wanting in the inner pair in xvii. Spermatheca?, one pair 

 in ix, club-Hke, medium size, small diverticula. Prostate 



