ON A NEW SPECIES OF LITTOKAL OLIGOCH/ETA. 



27 



EXPLANATION OF PLATE II. 



c. 



Ciliation in vas deferens. 



cl. 



Clitellum. 



f. 



Spermduct funnels. 



g-P- 



Genital papilla. 



m. 



Male pore. 



n. 



Nuclei of the wall of vas deferens. 



0. 



Ovary. 



od. 



Oviduct. 



od p. 



Oviducnl pores. 



op. 



Opening of vas deferens into the spermiducal gland 



P- 



Pad-like ridges. 



per. 



Peristouiium. 



pr. 



Praestomiuin. 



sp. 



Spermathecse. 



sp.gl. 



Speruiiducal gland. 



sp.gl.c. 



Cavity of the glandular part of spermiducal gland. 



spgl.g. 



Glandular part of the spermiducal gland. 



sp.gl.ru. 



Muscular part of the same. 



sp.p. 



Spermathecal pores. 



sp.s. 



Speruisacs. 



t. 



Testes. 



v.d. 



Vas deftiens. 



w.v.d. 



Wall of vas deferens. 



Fig. 1. Ventral view of Pontodrilus matsusMmensis, nov. sp. 2,1. 

 Fig. 2. Dorsal view of the anterior end. a x X 1 Zeiss. 



Fig. 3. Ventro-lateral view of the region succeeding the clitellum. showing the pad-like 



ridges and the genital papilla, a t X 1 Zeiss. 

 Fig. 4. Diagram showing the positions of sexual organs. 



Fig. 5. The left spermiducal gland seen from the left side, reconstructed from serial 

 sections. 50/1. 



Fig. 6. A section of a spermiducal gland showing the opening of vas deferens into the cavity 

 of the glandular part of the spermiducal gland. yL- horn, x 2 Zeiss. 



Printed January 31, 1897. 



