258 DESCRIPTIONS OF EARTHWORMS. 



blance with the digitate lobes of the ovary. Examining them 

 with a high power, I found the ovaries of this species consisting 

 of numerous loops of blood-vessels and a germinal epithe- 

 lium , containing eggs in all stages of development, attach- 

 ed to their wall. 



EXPLANATION 



OF 



Plate 4. 



Fig. 1. Ac. Schkgeln Horst; general view of the contents 

 of the body-cavity: gl. intestinal coeca; Iv. lateral 

 vessel; o. ovary; pr. prostate gland; r. ciliated ro- 

 sette of the vas deferens ; sp. spermatheca ; t testes ; 

 vs. vesicula seminalis. 

 Fig. 2. Genital region, from the ventral side, to show the 

 depressed area, with the male genital pores on 

 segments 17 and 19. 

 Fig. 3. a. Penial setae; b. ordinary setae, x 16 diam. 

 Fig. 4. The free extremity of a penial seta, highly mag- 

 nified , to show the small pitts on its surface. 

 Fig. 5. Testis, x 36 diam. 



Fig. 6. A single testis-lobe , more highly magnified. 

 Fig. 7. Ovary. X 36 diam. 

 Fig. 8. Lobe of the ovary, x 90 diam. 



Notes from the Leyden ÜMuseum, Vol. IX. 



