JOURNAL OF MICROSCOPICAL SCIENCE. 
DESCRIPTION OF PLATES II & II, 
Illustrating Mr. E. Ray Lankester’s paper on the Harthworm. 
PLATE IL. 
Fig. 
1.—Genitalia of Zumbricus terrestris, much enlarged. 
2.—Portion of ciliated canal or segment organ of Lumbricus, 
a. Granular tissue. 6. Cilia. ¢. Capillary. 
3.—Testes, seminal vesicles, and vasa deferentia, of the right side, 
seen posteriorly. 
4.—Ciliated canal or segment organ from posterior of body. 
5.—Fibrous tissue of testis. 
6.—Nucleated epithelium of ciliated receptacle. 
7—11.—Development of zoosperms. 
12.—Commencement of the seminal duct, or vas deferens. 
PLATE III. 
1.—Segment organs, and their modifications, in the 8—15 segments of 
Lumbricus. 
a. Normal canal. 
6. Sperm-reservoir. 
C. ae deferens. Segment organs ? 
d. Oviduct. 
e. Capsulogenous gland. 
2.—Oviduct, magnified. 
3.—Ovary, more highly magnified. 
4.—Papille of cingulum. 
5.—Typical segment of an Oligochete. 
6.—Pores of the first sixteen segments. 
7.—Cingulum. 
8,.—Dermal canals. 
