633 



Ox SOME NEW AuSTRi.LUX TUBICOLOUS AxNELIDS. 



By William A. ITaswell, M.A., B.Sc. 

 [Plate XII.] 

 Eupomatus elcgans, sj). n. (Plate XII., fig. 1.) 



The operculum presents distally a circlet o£ tweuty taperin^ 

 processes, Avhicli fit close together below, but diverge towards 

 their apices ; each of these is ornamented with several pairs of 

 short acute side branches ; below their distal circlet is a collar o£ 

 about forty palisade-like processes placed in close apposition, 

 the rounded ends of which give the collar a crenated border. 

 Branchiae pinnate. Setse simple. The branchia? are of a brilliant 

 scarlet, their stems white at the base and rich brown more distally. 

 The ojDerculum is yellow with a transverse brown band. The 

 tube is smooth and of a cylindrical, somewhat sigmoid form. 



Hah. Port Jackson. 



This species differs from the European U. trypanon in the 

 greater number of the processes in the distal circlet on the 

 operculum. 



Ammochares tenuis, sp. n. (Plate XII., fig. 2.) 



The segments vary in number between nineteen and twenty- 

 five ; the middle ones are the longest, being several times as long 

 as broad ; the first three and last three or four are much shorter. 

 The dorsal seta? are simple needles ; si neuropodial transverse 

 ridge with minute uncini occurs in all the segments except the 

 first two and two or three at the posterior extremity of the body. 

 There are about fifteen branchiae, presenting short branches, 

 which may in turn be subdivided. In each of the first seven 

 segments is a pair of vermiform glands,* each of which opens 

 near the parapodium, its inner extremity being suspended freely 

 within the perivisceral cavity. The alimentary canal is surrounded 



* It is conjectured that these serve to secrete the tube. There appears 

 to be a lumen lined with cubical, non-ciliated cells. 



