On the Australian Species of A mat hi a. 133 



the same length between the clusters ; each zocecium with a long 

 hollow process on each side, about a half of its length and with 

 a rounded sinus between them. 



Port Phillip Heads. Marouba Bay, JS'ew South Wales, Mr. 

 Whitelegge. 



This is a very marked species, at once distinguished by the 

 separate spiral clusters of zooecia with the free stem between 

 them, and by the peculiar long, thick, hollow processes from the 

 oritices. 



Dr. Pergens, writing without evidently having seen Mr. Woods' 

 proposed name A. bicor?iis (Bull. Soc, Malacol, Belgique, 1887), 

 considers that the name A. spinosa attached by Desmarest and 

 Leseur to a figure of this species should be retained. As, however, 

 neither description nor figure was ever published, Mr. Tenison 

 Woods' name must stand. 



3. A. CONVOLUTA, Lamouroux. 

 (^Plate A., ri.i<. 3.) 



Amathia convoluta, Lamouroux, Pol. Coral!. Flex., p. 160 ; De 

 Blainville, Man. d'Actinologie, p. 476. 



Serialaria crispa, Lamarck, Anim. Sans Vertebres, ed. 1, ii., 

 131; ed. 2, ii., 172; ed. 3, i., 212. 



Amathia spiralis, Busk, Challenger Polyzoa, pt. ii., p. 34, pi. vi., 

 fig. 2. 



? A. tortuosa, Busk, I.e. p. 34, pi. vi., fig. 1. 



Zoarium forming tufts of rather loose, long, straggling, irregu- 

 larly divided branches. Zocecia long, narrow, arranged in a 

 continuous spiral interrupted at the divisions of the branches, 

 diverging from the axis above and leaving portions of the stem 

 visible between the turns ; each zocecium convex, the contiguous 

 margins not produced into a point. 



Port Philip Heads, Mr. J. Brace bridge Wilson. 



Forms loose tufts of an olive or brownish colour, the branches 

 two or three inches high and irregularly divided. The zoa>cia are 

 long, narrow, closely united laterally except sometimes at the 

 apertures, and forming an open spiral of about one or one and a 

 half turns in each internode, the free margin diverging consider- 

 ably from the stems, which are conspicuously visible in the 



