256 Transactions. 



The sperniathecse, in 8 and 9, have a form common in the 

 family ; each is a pyriform sac with an ill- defined duct, into 

 which opens a small pyriform diverticulum. 



Excretory System.— -Like the preceding species, this one is 

 micronephric, but a fairly large funnel is present in each seg- 

 ment, of an elongated crescentic form, intermediate in form 

 between the normal funnel and the long V-shaped funnel of 

 D. qiqantea. 



Both this and the preceding species are provided with a pair 

 of peptonephridia anteriorly. 



hoc. — Bank of stream in dense bush. 



EXPLANATION OF PLATES XLI AND XLII. 

 Plate XLI. 



The illustrations of the anatomy of the earthworms are purely dia- 

 grammatic, indicating only the segmental position of the various organs, 

 the worm being supposed to be slit up along the dorsal hne and the body- 

 wall pinned aside. A group of three diagrams refers to each worm herein 

 described. 



The left-hand diagram in each of the groups referring to a species 

 represents the external features. The location of the various genital 

 pores is represented as round black dots (if on a papilla this is left white), 

 the clitellum is obliquely shaded, the tubercula pubertatis are vertically 

 shaded. 



In addition, the arrangement of the chsettB is indicated in segments 5 

 to 23 on one side ; they are omitted on the other side for clearness' sake. 

 But only about half the true number of chsetse are indicated. 



The middle figure represents the alimentary canal and so much of 

 the vascular system as is diagnostic. The latter is black. The gizzard is 

 indicated by vertical shading, the oesophageal glands by more or less 

 horizontal lines. The intestine is not represented as being constricted, 

 which is, however, the case in most worms. 



The right-hand figure shows the reproductive system. The gonads 

 are in black. The sperm-sacs are dotted. The muscular duct of the 

 spermiducal gland is transversely striped. 



No attempt is made to give the relative sizes of the worms or of the 

 various organs. 



Plate XLII. 



Figs. 1, 2, 3' are diagrammatic representations of the external anatomy 

 of R. parvus, D. annectens, and J>. beddardi respectively. 



The location of the genital pores, clitellum. and tuber- 

 cula. pubertatis is represented, and the 1 rue relative spacin'_ r 

 of tin- chaetae on one side, which arc labelled '/. b, c. d, &c. 



The nephridiopores in ft. parvus are indicated by the 

 small circles on the right side of the figure. 



Pig. t. Rkododrilus parvus. Spermatheca. 



Fig. 5. A', parvus. A penial enseta; X 80. 



Fig. (>. The same, tip enlarged ; x 480. 



Fig. 7. Diporochceta shakespeari. A spermatheca. 



Pig. 8. /;. gigantea. Spermatheca. r,r', the two muscular ridges along 

 the main sac. 



Pig. '.i. The same in transverse section, showing muscular ridge at each 

 end. 



