il2 CALIFORNIA ACADEMY OF SCIENCES. [Proc. 3D Ser. 



17. Sperm-ducts not thicker at the pores. Setae b absent in XVII. 



Spermathecae and prostates are very minute. 



guatemalce Eisen. 



18. Sperm-ducts not thickened at the pores. Setce b absent in XVII. 



Spermathecae minute. Prostates large sonorcs Eisen. 



III. No prostates. Spermathecae in IX, without diverticles. Racemose 



sperm-sacs. No sperm-sacs capping the testes. Two pairs of testes. 

 Ilyogenia Beddard, (57). 



19. No trace of the muscular part of the prostates remaining. 



taste (Eisen, 17). 



20. A trace of the muscular part of the prostates remains as a small 



atrial chamber at the male pore tepicensis (Eisen, 18). 



21. No trace of the prostates remains. Ovaries fused in the median 



line africana (Beddard, 57). 



IV. Prostates present. Two pairs of testes. Spermathecae in VIII, without 



diverticles. Sperm-sacs present in X, XI, XII, not racemose. 



Leiodrilus, subgen. nov. 



22. Eiseni Beddard (20). 



V. Prostates present. Spermathecae in IX, with two or more diverticles. 



Racemose sperm-sacs. Male pores more or less approximated . Two 

 pairs of testes. 



PygmcBodrilus Michaelsen, (12). 



23. Male pores close to the median line. Sperm-ducts thickened 



near the pores. Spermathecae stalked, with 2 to 4 diverticles 

 each bucobensis (Michaelsen ii, 16). 



24. Male pores distant from median line. Sperm-ducts with a mus- 



cular, globular enlargement at the pore. Spermathecae with a 

 row of diverticles at the base. 



quilimanensis (Michaelsen 12). 



25. Male pores close to the median line. One single median sperm- 



atheca in IX, with four diverticles. 



affinis (Michaelsen ii, 16). 



26. Male pores not far from median line. One pair of spermathecae 



in IX, with three diverticles. 



bipunctatus Michaelsen (16). 



VI. Prostates present. Spermathecae in IX, without diverticles. Racemose 



sperm-sacs. No sperm-sacs capping the testes. Dorsal pores. One 

 pair of testes. Rudimentary gizzards in VI and VII. 



JVematogenia, subgen. nov. 



27. lacuum Beddard (39). 



28. lacumn, var. panamaensis var. nov. 



VII. Prostates present. Spermathecae in IX, without diverticles. No race- 



mose sperm-sacs. One pair of testes. No gizzard. No dorsal pores, 



Ha^Iodrilus, subgen. nov. 



29. Borelli Rosa (40). 



