514 OLIGOCHAETA 



tpermalhecae are long and cylindrical in IX. Hob. San Antonio, Guatemala; under 

 damp moss at ftjrrings. 



(9) Ocnerodrilus contractus, EISEN. 

 O. contractus, EISEN, loc. cit., p. 262. 



Definition. Clitettum, XIH-XVIII. Ventral setae of segment XVII wanting. Septal 

 glands of V equal in size to those of VI, which is largest of four ; that of VIII very 

 small. Spermiducal gland long ; glandular part \ \ times as long as muscular part. 

 The sperm-ducts are ensheathed near to opening with muscular fibres. Spermathecae not 

 so large as that of 0. rosao, but larger than in O. hendriei in IX. Hab. Guatemala; 

 in pools. 



(10) Ocnerodrilus agricola, EISEN. 

 O. agricola, EISEN, loc. cit., p. 265. 



Definition. Clitettum, XHI-XVIII. Septal gland of V larger than that of VI ; gland of 

 VIII smallest. Ventral pair of setae in segment XVII wanting. Spermiducal glands 

 extending as far back as segment XXVIII ; glandular part four times and more the length 

 of muscular part. Sperm-duct enveloped terminally by muscular fibres. Spermathecae 

 globular with muscular duct in IX. Hab. Guatemala; in moderately dry soil. 



(u) Ocnerodrilus quilimanensis (MICHAELSEN). 

 Pygmaeodrilus quilimanensis, MICHAELSEN, JB. Hamb. wiss. Anst., vii, 1890, p. 12. 



Definition. Length, 38 mm. ; diameter, 1-5 mm. ; number of segments, no. Clitettum, 

 XIV-XVI, complete. Gizzard absent (?)y intestine begins gradually in segment XII. 

 Testes, two pairs; sperm-sacs in IX, XII. Spermiducal glands open into a terminal 

 muscular sac, into which the sperm-duct appear to open. Spermathecae with a circle 

 of minute diverticula. Hab. Quili>//ane, East Africa. 



(12) Ocnerodrilus bukobensis (MICHAELSEN). 

 Pygmaeodrilus bukobensis, MICHAELSEN, loc. cit, 1892, ix, 2, p. 4. 



Definition. Length, 120 mm.; diameter, 1 mm.; number of segments, 120. Clitettum, 

 XIII-XVIII, complete. Gizzard absent. Testes, two pairs ; sperm-sacs in IX, XTI. 

 Spermathecae with two or four large dirertirula. Hab. Victoria Nyanza, near Bukoba. 



This species is also to be distinguished from the last by the near approximation 



