574 NOTES ON AUSTRALIAN EARTHWORMS. 



EXPLANATION OF PLATES. 



List of References. 



The numbers on the left of the figures indicate segments. 



Plate VIII. 



Fig. 1. — Anterior portion of the body of Notoscolex Camdenensis opened 

 from the back, to shew the general relation of the alimentary 

 canal, and a portion of the genitalia. Portions of some of the 

 thick mesenteries are indicated, but the first four being incom- 

 plete should not have been shewn, this region being occupied by 

 the pharyngeal muscles. 



Fig. 2. — A pair of the kidney-shaped intestinal (calciferous) glands seen 

 from the front. 



Fig. 3. — A mesentery with a pair of testes attached to it. 



Fig. 4. — A pair of spermathecae displaced, and turned outwards. 



Fig. 5. — SpermathecaB folded inwards in the natural position. 



Fig. 6. — Anterior portion of N. grandis, seen from below, to shew the 

 clitellum, ridges, and male pores. In this specimen the papillae 

 on which the pores open, are fused with the posterior ridge. 



Plate IX. 



Fig. 7. — Anterior portion of the body of Didymognster silvaticus, seen from 

 below. The position of the spermathecal pores on IX, x, and 

 xi ; of the oviducal apertures on xiv ; of the male pores on 

 xvni ; and of the setae on some of the segments, is indicated. 



Fig. 8. — Dissection of the anterior portion of the body from above, to shew 

 the alimentary canal and part of the genitalia. The vas 

 deferens is represented disgrammaticaUy on one side, its exact 

 relation with the prostrate being undeterminable in my 

 specimens. (Twice the natural size.) 



Fig. 9.— Dissection of portion of the anterior part of the body of Perichceta 

 australis, to shew the arrangement of part of the genitalia. 

 The left anterior testis, and the right posterior spermatheca have 

 been omitted ; and the ca^ca of the spermathecae are turned 

 forwards. Note. — As the testes are really attached to the thick 

 mesenteries which are here omitted, it is difficult to represent 

 them as they really are. 



Fig. 10. — Spermatheca with its caecum. (Enlarged). 



Fig. 11.— Prostate with the genital duct. (Enlarged.; 



