514 OLIGOCHAETA 



sjaermathecae are long and cylindrical in IX. Hah. — San Antonio, Guatemala; muler 

 damp moss at springs. 



(9) Ocnerodrilus contractus, Eisen. 



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



Definition. Clitellum, XIII-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 j glandular part 1 1 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 0. hendriei in IX. Hah. — Guatemala ; 

 in pools. 



(10) Ocnerodrilus agricola, Eisen. 



O. agricola, Eisen, loc. cit., p. 365. 



Definition. Clitellum, XIII-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 bach as segment XXVIII ; glandular part four times and more tlie length 

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

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



(11) 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. Clitellum, 

 XIV— XVI, complete. Gizzard absent (?); 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. Ilab. — Quilimane, Bast Africa. 



(12) Ocnerodrilus bukobensis (Michaelsen). 



Pygmaeodrilus bukobensis, Michaelsen, loc. cit, 1893, ix, 2, p. 4. 



Definition. Length, 130 mm.; diameter, 2 mm.; number of segments, 130. Clitellum, 

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

 Spermathecae with two or four large diverticula. Ilab. — Victoria Nyanza, near Bukoba, 



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



