132 Proceedings of the Royal Society of Victoria. 



de Polypiers, p. 10, pi. 65, tigs. 16, 17; MacGillivray in 

 McCoy's Prodromus of Zoology of Victoria, pi. 185, fig. 2. 



Serialaria convoluta, Lamarck, Auim. Sans Vertebres, ed. 1, ii., 

 131 ; ed. 2, ii., 170 ; ed. 3, i., 212.* 



Serialaria spiralis, De Blainville, ]Manuel d'Actinologie, p. 476. 



Zoarium forming dense tufts several inches high, attached by 

 fine radical tubes. Branches erect, stiff, dichotomously divided. 

 Zooecia long, narrow, united laterally through their whole length 

 to form a continuous uniserial spiral, interrupted only at the 

 bifurcations and closely applied to the branch ; each zooecium 

 convex, the contiguous walls of adjoining zooecia united and 

 projecting upwards as slight points. 



Port Philip Heads. Port Jackson, Mr. Whitelegge. 



Grows in large tufts, the largest I have seen being nearly 

 five inches high. The branches are long, dichotomously divided, 

 with a length of a quarter to half an inch between the bifurca- 

 tions. The zorecia are long, narrow, united side to side to form a 

 continuous spiral closely united or adpressed to the branches 

 which they conceal, and interrupted only at the bifurcations. 

 They are convex, separated l)y grooves, the united contiguous 

 margins projecting upwards as small points ; when dried the 

 anterior surface is collapsed and depresse.l, the separating walls 

 projecting and their upward prolongations being more prominent. 



2. A. BicoRMS, Tenison "Woods. 

 (Plate A., Fig. 2.) 



Serialaria spiralis, Tenison Woods, Proc. Koy. Soc, New South 

 Wales, July, 1877. 



Amathia bicornis, T. Woods, Proc. Roy. Soc, Victoria, June, 

 1879; MacGillivary in McCoy's Prod. Zool. Vict., pi. 185, fig. 1. 



Zoarium forming dense tufts one or two inches high. Branches 

 irregularly divided. Zorecia rather long, slightly convex, closely 

 united side to side and arranged in spiral clusters of about two 

 complete turns, the cylindrical stem being unoccupied for nearly 



• My copy is ed. 3, Brussels, 1837. It i>, I believe, the same as the 2nd edition, edited 

 by Deshayes and Milne Eiwards, the extensive additions and new observations on the 

 Polypes being by the latter naturalist. The references to the other editions are taken from 

 Miss Jelly's invaluable Catalogue of Marine Bryozoa. 



