10 Gustaf Eisen, Echpideilid^ and their anatomy. 



PI. II. 



Eclipidrilus frigidus n. sp. 



Fig. 8. Tlie cephalic ganglion, and the anterior part of the ventral nerve cord. 



Fig. 9. ïiie interior extremity of the segmental organs. 



Fig. 10. Eclipidrilus frigidus, nat. size. 



Fig. 11. One of the ovaries. 



Fig. 12. One of the seminal receptacles. 



Fig. 13. The efferent duct, highly mgfd. 



p. = penis. 



b. w. = body wall. 



ex. = exterior duct. 



in. = interior duct. 



or. in = orifice of interior duct. 



or. = orifice of exterior duct. 



spr. := spiral muscles. 



stz. := spermatozoa. 



V. s. = seminal vesicle. 



sex. p. =: sexual porus. 

 Fig. 14. The middle part of the same, only more magnified, to show the different layers, 



and the orifices of the exterior duct. Letters as above. 

 Fig. 15. The exterior extremity of the efferent-duct, showing the penis proper. 



Fresno, California, July IS'i" 1880. 



