16 Proceedings of the Royal Society of Victoria. 



the lateral surfaces are of the same colour, but chequered 

 with little rectangular light areas. 



The prostomium is not completely dovetailed into the 

 peristomium (about I,). 



Clitellum well marked, tumid and complete, occup3dng 

 segments 1-i-lG. 



Setie, in front of the clitellum, 10 on each side ; behind, 

 12. 



Male pores on segment IS, at the level of the interval 

 between the two inner setfe of each side. Between the two 

 openings a ridge runs across the mid-ventral surface, with a 

 de]5ression both in front of, and behind, it. 



Oviduct pores on a small elliptical ])atcli on segment 1 4, 

 anterior to the level of the setse. 



Spermathecal pores difficult to see externally. 



Accessory copulatory structures. None present. 



Alimentary canal. Gizzard in segment 5. JS!o true cal- 

 ciferous glands. Large intestine commencing in segment 



Circulatory system. Dorsal vessel single. Last heart in 

 segment 1 2. 



Excretory system. Meganephric. 



Reproductive system. Two pairs of testes in segments 

 10 and 1 1 ; rosettes opening into the same segments. 



Prostates small, tubular, coiled, in segment 18. 



Sperm sacs, one pair, attached to the anterior wall of 

 segment 12. Sac-like in form. 



Ov^aries in segment 13, with oviducts opening into the 

 same segment. 



Spermathecre, five pairs, in segments 5-9. Each con- 

 sisting of a long sac with a short diverticulum. 



Habitat. Walhalla (collected by Dr. Dendy). 



I have, unfortunately, only one specimen (a mature one) 

 of this form. But the shape and colouration of the body, 

 together with the absence of accessory copulatory structures, 

 render it so distinct from other forms that I have ventured 

 to distinguish it specifically. 



(14) Perichwta dicksonia, sp. n. (Figs. 7, 8, \)). Length of 

 spirit specimens 2 inches, width less than ^ inch. 



Prostomium completely dovetailed into the peristomium, 

 which is marked by a median ventral cleft. 



Clitellum well marked, complete, occupying segments 

 14-16. 



