398 APPENDIX. 



6. P. ramosa, n. sp. 



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

 elevated on the sides, expanding, with four teeth on each 

 side, the first and second in. front much expanded, acute, 

 incurved at the point; a long slender incurved central 

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

 tinued to the rachis, adnate the 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. Costae 

 of ovarian receptacle vdth short opposite tubular branches ; 

 not connected by a membrane. 



Hab. — Swan Island, Banks Strait, thrown on the 

 beach. 



Colour greyish brown; polypidom 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, slightly 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. phasnicea, n. sp. 



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



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