106 THE AUSTRALIAN MUSEUM. 



Alimentary canal. The stomach is a wide oval, nearly globular, and 

 has 10 longitudinal grooves. It has a small anteriorly placed caecum, 

 into which the duct from the intestinal gland opens. The long vermi- 

 form caecum of Sarcobotrylloidcs purpurcum and S. anceps is not present. 

 There is a narrow, well-marked lip running round the anal aperture. 



The Gonads on each side of the thorax contained ova only, in the 

 Ascidiozooids examined. 



Locality. Port Stephen ; four colonies. 



The species comes very near to Sarcobotrylloides purpureum, and 

 S'. anceps, but appears to be distinct. It differs in appearance of colony 

 and slatey colour. The Ascidiozooids are not so large nor conspicuous 

 (see PI. Bot. Ill, figs. 1, 8 and 10). 



[The following Botryllidae have also been recorded from the Australian 

 seas : 



Botryllus (? Symplegma) raccmosus, Q. and G. 

 ? Distomus violaceus, Q. and G.]. 



