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MR FRANK E. BEDDARD ON THE ANATOMY OF OCNERODRILUS. 



Ocnerodrilus Eiseni, n. sp. 



Clitellum occupying segments XIII-XIX. Ventral setse of segment XVII entirely 

 absent. Septal glands in anterior segments. One pair of spermathecse in segment VIII 

 opening on to border line between this segment and the one in front. 



The affinities of the genus appear to me to be capable of being expressed in the 

 accompanying scheme, which only contains those Earthworms (viz., the Cryptodrilidae) 

 which come nearest to Ocnerodrilus. 



Ocnerodrilus. 



Lumbriculiche. 



Phreoryctidse. 



Photodrilus. 



\Microscolex. 





Pontodrilus. 



Cryptodrilidse. 



LIST OF MEMOIRS CONSULTED. 



[1] Eisen, G., "On the Anatomy of Ocnerodrilus," Nova Acta Reg. Soc. Sci. Upsaliensis, ser. iii., vol. x. 



(1878), 12 pp., 2 pis. 

 [2] Eisen, G., "On the Anatomy of Sutroa rostrata, a new Annelid of the Family Lumbriculina," Mem. 



California Acad. Sci., vol. ii. No. 1 (1888), 8 pp., 2 pis. 

 [3] Beddarij, F. E., "The Classification and Distribution of Earthworms," Proc. Roy. Phys. Soc, vol. x. 



(1890-91), pp. 235-290, 2 maps. 

 [4] Beddard, F. E., "Observations upon an American Species of Perichmta and upon some other Members 



of the Genus," Proc. Zool. Soc. for 1890, p. 52, pis. iv. v. 

 [5] Beddard, F. E., " On Two New Genera of Earthworms belonging to the family Eudrilidse, with some 



Remarks upon Nemertodrilus," Quart. Journ. Micr. Sci., new ser., vol. xxii. p. 235, pis. xvi.-xx. 

 [G] Beddard, F. E., " On the Structure of a Species of Earthworm belonging to the Genus Diachatta," 



Quart. Journ. Micr. Sci., new ser., vol. xxxi. pp. 159-174, pi. xx. 

 [7] Beddard, F. E., " On a New Genus of Earthworms and on Anal Nephridia in Acanthodrilus," Quart. 



Journ. Micr. Sci., new ser., vol. xxxi. p. 467, pis. xxiii. xxiiiA. 

 [8] Beddard, F. E., " Observations upon the Structure of a Genus of Oligochaeta belonging to the 



Limicoline Section, Trans. Roy. Soc. Edin., vol. xxxvi., pt. 1, No. 1. 



