APPENDIV. 401 



well shewn, through P Macgiliivrayi and the present 

 species. 



12. P campanula, n. sp. 



Cells campaniilate, border entire ; lateral and anterior 

 appendages canalicular. Branches alternate. Ovicells — ? 



Hab. — Bass Strait, 45 fathoms dead shells. 



There appear to be two varieties of this species, or that 

 different portions of the same polypidom may assume very 

 different characters. The larger and probably more com- 

 mon form, is at first sight extremely like P Catharina, 

 but it will soon be noticed that the branches are alter- 

 nate instead of opposite. The shape of the cells and their 

 average size is precisely the same as in that species. The 

 lateral and anterior appendages differ in form very con- 

 siderably. In P. Catharina these organs are longer, 

 more slender, infundibuliform, whilst in P. campanula 

 they are shorter and thicker and the terminal cup is open 

 on one side or canalicular. The ovicells might perhaps 

 afford a more striking characteristic, but they are unfor- 

 tunately wanting in all the specimens of P. campanula . 

 The second variety is much slenderer, unbranched, the 

 cells and their appendages smaller but of the same form, 

 and the cells usually contain a mass of opaque black matter. 

 This species is parasitic, and appears to attain a height of 

 several inches. 



FAM. IV.— ca:mpanulariad.e. 



4. Cajipanularia, Lamarck. 



1. C.volubilis? Ellis. 



Hab.— Prince of Wales Channel, Torres Strait. 



As one or two ovicells, parasitic upon Sertutaria pristis, 

 are the only evidences of this species that have come under 

 observation, some doubt as to identity of the species with 

 the British form may be entertained. 



2. C. ftumoaa, PaUas. 



VOL. I. 2d 



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