398 APPENDIX. 



6. p. ramosaj n. sp. 



Cells cup-sliaped, deep, rounded at bottom; margin 

 elevated on tlie sides_, expanding, witli font* teetli on each, 

 side, tlie first and second in front mucli expanded, acnte, 

 incurved at tlie point; a long slender incui'ved central 

 tooth in front ; margin entire beliind. Rostrum not con- 

 tinued to tlie rachis, adnate tlie whole length of the cell, 

 wide and projecting, narrowed to the point, which is 

 tubular, opening oblique, longer than the cell; lateral 

 processes conical, short, tubular, closely adnate. Costse 

 of ovarian receptacle with short opposite tubular branches ; 

 not connected by a membrane. 



Hab. — Swan Island, Banks Strait^ thi'own on the 

 beach. 



Colour greyish brown ; polj'pidom 4 — 5 inches high, 

 much branched, branches irregular, divaricate, rising in 

 great numbers almost immediately from the mass of 

 radical fibres. A. beautiful species, and the ovarian recep- 

 tacles very interesting. 



7. P. divaricata, n. sp. 



Cells cup-shaped, long, shghtly contracted at bottom ; 

 mouth circular ; margin sub-expanded, dentate, with three 

 nearly equal upright teeth on each side, and a long, round 

 pointed central tooth in front. Rostrum narrow at bottom, 

 closely adnate, scarcely rising higher than the central tooth ; 

 lateral processes small, closely adnate. 



Hab. — Bass Strait, 45 fathoms. 



Colour dark brown, almost black when dry. In habit 

 it is extremely like the preceding species, from which, 

 however, it is quite distinct. The polypidom is five to six 

 inches high, perhaps more; stem slender, branches long, 

 divaricate at right angles, not opposite. 



8. P. phoenicea, n. sp. 



Cells cup-shaped, rounded, bent over in front, so that 



