BY J. J. FLETCHER, M.A., B.SC. 559 



vessel which is noticeable in some of the segments commencing 

 with x : of these peculiarities I reserve a fuller description 

 until I have been able to make a further examination of them. 

 There are the usual transverse branches from the main trunks to 

 the intestine, &c. The double condition of the supra-intestinal 

 trunk is not unlike what Beddard has met with in two species of 

 Acanthodrilus from New Zealand. 



The segmental organs are quite inconspicuous ; probably the 

 little glandular tufts attached to the ccelomic wall are these 

 organs, but to make out their structure and relations requires 

 more careful study than I have yet been able to give them. I 

 have never been able to see any nephridiopores. 



In each of the four segments v to ix or thereabouts is a pair of 

 peculiar bodies, one lying on either side of the oesophagus, and 

 both richly supplied with vessels ; of the structure and relations 

 of these I must also postpone the consideration. 



Hob. — Burrawang, Springwood, Jervis Bay, N. S. W. 



C. POSTCLITELLIAN WORMS. 



Dig aster, Perrier. 



This genus comprises postclitellian worms with two gizzards and 

 eight rows of seta?. Only one species has been described. 



5. Digaster lumbricoides, Perrier. 



Nouv. Arch, du Mus. Paris, vin, 1872, p. 94, pi. i, fig. 24, pi. 

 iv, figs. 64 and 65. 



This species of which I have not yet seen examples, is characterised 

 by the possession of two gizzards, — one in segment v the other in 

 vn — eight rows of setae, a clitellum of three segments (xiv-xvi), 

 male pores on xviii, two pairs of pear-shaped sperma thecae in 

 segments vin and ix, two pairs of racemose testes in x and xi, a 

 pair of flattened prostates. 



Perrier says of this worm that it is difficult at first sight not to 

 confound it with an ordinary Lumbricus, whence the specific 

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