360 APPENDIX. 



Colour bro"«'n^ loosely branclied and several inches higli. 

 Distingnislied readily by the cribriform aspect of the front 

 of the cell^ and by the cuiiously formed central orifice, 

 and by the absence of any superior appendage to the 

 avicularium. 



h. Vittatce. Cells furnished with a narrow elongated 

 band or vitta on each side, without fenestrse. Ovicells 

 not terminal, galeriform. 



8. C. formosa, n. sp. 



Cells oval; avicularia large, flat, or cupped above. 

 Vittse elliptical, rather anterior. 



Hab. — Swan Island, Banks Strait. 



Colour light plumbeous. Parasitic upon C. margaritacea. 

 The cells are the largest of any in the Yittate di^dsion, 

 and very regular and uniform in size and outline. The 

 more distinctive characters are taken from the compara- 

 tively broad vittse, and the flat or cupped upper surface of 

 the a\icularia, which are usually continued downwards into 

 a prominent ridge or aia. 



9. C. gibhosa, n. sp. 



Cells pyriform, ventricose posteriorly, much attenuated 

 at bottom. Avicularia small, placed in front close to the 

 sides of the mouth, at the base of strong conical pointed 

 processes which project in fi^ont, and are connected across 

 the top of the cell by a prominent toothed ridge. Yittse 

 long hnear, entirely lateral. 



Hab. — Prince of Wales Channel, Torres Strait, 9 fathoms, 

 mud. 



Of a dark lead colour, when diy. Forms an elegantly 

 branched bush about two inches high. The gibbous form 

 of the cells, and the peculiar anterior position of the avicu- 

 laria, at the base of the projecting lateral processes, at 

 once distinguish it from all tlie other vittate species. 

 The toothed (sometimes entire) ridge extending between 

 the two lateral processes across the top of the cell and 



