DESCRIPTIONS OF GENERA AND SPECIES 513 



(5) Ocnerodrilus sonorae, EISEN. 



O. sonorae, EISEN, loc. cit., p. 251. 



Definition. Clitellum, XIV-XVII. Outer setae of ventral pair of segment XVII wanting. 

 Septal glands in V-VIII, nearly equal in size, slightly diminishing from before backwards. 

 Spermiducal gland confined to two segments, the muscular part not narrower than the 

 glandular. Spermathecae without differentiated muscular duct. Hob. Sonora, Mexico; 

 in moist soil near irrigation canals. 



(6) Ocnerodrilus hendriei, EISEN. 

 O. Hendriei, EISEN, loc. cit., p. 252. 



Definition. Length, \\ inch by f line. Clitellum, XIII-XVIII. Ventral pair of setae on 

 XVII wanting. Septal glands of V larger than VI ; those of VII and VIII very small 

 and eqmsized. Spermulucal glands occupy about two segments. Spermathecae in IX very 

 small. Hab. Saint Tomas, Guatemala ; on the road after rain. 



(7) Ocnerodrilus limicola, EISEN. 

 O. limicola, EISEN, loc. cit., p. 254. 



Definition. Clitellum, XIII-XIX. Ventral setae of segment XVII present. Septal glands 

 of V slightly larger than the following pairs ; those of VIII the smallest. Two pairs 

 of spermiducal glands in XVII, XVIII, the former, as usual, connected with sperm- 

 duct. Spermathecae in IX very small. Hal. Guatemala ; in mill pond. 

 It is not quite certain from EISEN'S description whether the ventral setae of xvii 

 are or are not missing ; in the description of the species they are said to be wanting 

 once (p. 255), and on the next page to be generally present ; on p. 275 they are 

 again said to be wanting, and on the ' Table of Species ' (facing p. 282) to be present. 



(8) Ocnerodrilus rosae, EISEN. 

 O. Rosae, EISEN, loc. cit., p. 258. 



Definition. Length, i inch by f line. Clitellum, XIII-XVIII. Ventral setae of XVII 

 wanting. Septal glands of V hardly larger than of VI. Intestine begins in XIII. 

 Spermiducal glands slender and long, the muscular part nearly half as long as glandular. 

 The sperm-ducts are enslieathed near to their opening with muscular fibres. The 



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