512 OLIGOCHAETA 



the existence of a single pair of spermathecae in the ninth segment, and in the single 

 pair of caleiferous glands in the same segment. Pending further information about 

 the lower Cryptodrilids of Africa, I retain it in the same genus as the species described 



by MiCHAELSEN. 



(i) Ocnerodrilus occidentalis, Eisen. 

 O. occidentalis, Eisen, Nova Acta Keg. Soc, Upsala, x (3), 1879, p. i. 



Definition, Length, 15 mm. Clitellum, XIII-XX. Setae not absent from segment XVII. 

 Testes only one jiair [in X) ; sperm-sacs only one pair (in XI). Spermiducal glands 

 very' long reaching to XXVI. Spermathecae absent. Hab. — Fresno, California. 



(a) Ocnerodrilus eiseni, Beddaed. 

 O. Eiseni, Beddaed, Trans. Eoy. Soc, Edinb., 1890, p. 563. 



Definition. Length, %^ mm. Clitellum, XIII— XYIII. Ventral setae of segment XVII wanting. 

 Spermidtical glands slightly coiled extending through three segments. Spermathecae in 

 VIII. Hab. — British Guiana. 



(3) Ocnerodrilus beddardi, Eisen. 



O. Beddardi, EiSEN, Proc. Cal. Ac. Sci., 189 a, p. 230. 



Definition. Length, 40 mm. Clitellum, XIII-XIX. Inner setae of ventral pair of 

 segment XVII wanting. Septa begin IV/V ; septa separating V/IX, much thickened. 

 Septal glands in V-VIII, last pair small, ihe largest in V. Hearts in X, XI, arising 

 from supraintestinal vessel. Nephridia commence in IV, the four anterior being small 

 and comparatively rudimentary. Spermiducal glands small only extending through two 

 or three segments. Spermathecae in IX with numerous rudimentary diverticula at free 

 end. Hab. — Baja California, near San Jose del Cabo. 



(4) Ocnerodrilus guatemalae, Eisen. 

 O. guatemalae, Eisen, loc. cit., p. 349. 



Definition. Length, 40 mm. Clitellum, XIV-XVIII. Outer setae of ventral pair of 

 segment XVII wanting. Septal glands of V largest, those of VII and VIII small and 

 nearly equisized. Spermiducal gland confined to a single segment, Spermathecae very 

 small. Hab. — Guatemala, in soil. 



In the characters not mentioned above the present species agrees with 0. beddardi. 



