MR FRANK E. BEDDARD ON THE ANATOMY OF OCNERODRILTJS. 



583 



[9] Benham, W. B., "An Attempt to classify Earthworms," Quart. Journ. Micr. Sci., new ser., vol. xxxi. 



p. 201. 

 [10] Benham, W. B., "Atrium or Prostate," Zool. Anz. (1869). 



[11] Rosa, D., "Nuova Classificazione dei Terricoli," Boll. Mus. Zool., Torino (1888). 

 [12] Rosa, D., "Sul Criodrilus lacuurn," Mem. R. Acad. Sci. Torino (1887), 17 pp., 1 pi. 

 [13] D'Udekem, Jules, " Nouvelle Classification des Annelides Setigeres Abranches," Bull. Ac. Roy. 



Belgique, t. xxii., No. 10. 

 [14] D'Udekem, Jules, " Memoire sur les Lombriciens," Mem. Ac. Roy. Belgique, t. xxxvi. 

 [15] Vejdovsky, F., "System u. Morph. d. Oligochseten," Prag., 1884. 



[16] Vejdovsky, F, " Entwickelungsgeschichtlicbe Untersuchungen," Prag., 1888 and 1890. 

 [17] Michaelsen, W., " Ueber Chylusgef assystern bei Encbytrseiden," Arch. mikr. Anat., Bd. xxviii. p. 292. 

 [18] Michaelsen, W., " Beitriige zur Kenntniss der deutscben Encbytrseiden-Fauna," Arch. mikr. Anat., 



Bd. xxxi. p. 483. 

 [19] Claparede, E., " Recbercbes Anatomiques sur les Oligochetes," Mem. Soc. Phys. Geneve, t. xvi. 

 [20] Giard, A., " Sur un noveau genre de Lombriciens Pbospborescents et sur l'Espece Type de ce genre 



Photodrilus phosphoreus," Duges, Comptes Rendus, Nov. 1887. 

 [21] Perrier, E., "Etudes sur l'Organisation des Lombriciens Terrestres," Arch. d. Zool. Exp., t. ix. p. 175. 

 [22] Beddard, F. E., "On tbe so-called Prostate Glands of the Oligochseta," Zool. Anz., 1887. 

 [23] Beddard, F. E., " On the Structure of Three New Species of Earthworms," &c, Quart. Journ. Micr. Sci., 



vol. xxix. p. 101, pis. xii. and xiii. 



EXPLANATION OF PLATE. 



Ocnerodrilus Eiseni, n. sp. 



Fig. 1. Dissection to show genital system. 



Fig. 2. Ventral view of anterior segments, n, nephridiopores ; s, spermathecal pores ; ? , oviducal pores ; 



^ , pores of vasa deferentia. 

 Fig. 3. Main vascular trunks in segments x. xi. ; d, dorsal vessel ; v, ventral vessel ; si, supra-intestinal ; 



h, heart. 

 Fig. 4. Alimentary canal, ph, pharynx ; d, diverticula of oesophagus. 

 Fig. 5. The worm of the natural size. 

 Fig. 6. Spermatheca in longitudinal section. 

 Fig. 7. A seta. 

 Fig. 8. Longitudinal section through segments XI, XII, to show connection of testes (t) with sperm sac 



(sp. s.) and intersegmental septa. 

 Fig. 9. Nephridium in transverse section, nph, nephridium itself ; h, vesicular cell ; a, small granular 



cells. 

 Fig. 10. Rudimentary nephridium of segment XI. sp, intersegmental septum ; other letters as in fig. 9. 

 Fig. 11. Nephridial funnel, sp, intersegmental septum. 

 Fig. 12. Longitudinal section through intestine. Among the columnar ciliated cells are large granular 



glandular cells. 

 Fig. 13. Atrium, transverse section. 

 Fig. 14. Section through a point near to opening of atrium (air.) and vas deferens (vas. de/.). 



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