188 Transactions of the South African Philosophical Society. 



form, thus providing it with a primordial chamber (see PI. XX., 

 figs. 2-3). And although I have not found a complete or perfect 

 specimen, viz., " the large pinnate test with a primordial chamber 

 intact," there can be no doubt that these few large cells or 

 chambers, taken in the same haul with the branching tests, of the 

 same characteristic form and composition, their fractured tubular 

 necks fitting as they do, in two or three instances, exactly the broken 

 basal portions of the larger erect branching tests, are the primordial 

 cells with which they were fixed on the sea-floor, and from which 

 these beautiful erect pinnate structures were produced, as will be 

 seen by the following detailed description, with figures showing 

 fractured and restored specimens (PL XX., figs. 1, 2, and 3). 



Family ASTKOKHIZID^. 



Sub-Family EHABDAMMININ^. 



Genus BOTELLINA, Carpenter. 

 Botellina, Carpenter (1869). Butschli, Brady. 



GENERIC CHARACTERS. 



Typical Form. 



[Botellina pinnata, Pearcey.) 



Test free, arenaceous, erect, pinnate, rising from a primordial 

 chamber, oval, subglobular, subangular, or compressed in form, 

 with pseudopodial openings situated at the extremity of pinnate 

 outgrowths ; walls thick, of very firm consistence, subdivided into 

 chambers which communicate freely into a main tubular chamber, 

 running through the whole test, compactly cemented and generally 

 smooth externally, in colour ferric brown of various shades. It is 

 conspicuous amongst all other known AsTRORHiziDiE by its robust 

 form and size. 



Primitive Form. 

 (Botellina labyrinthica, Brady.) 



Test arenaceous, cylindrical, straight or slightly curved, some- 

 what irregular in outline, one end rounded and more or less swollen 

 (the natural condition of the other end not certainly known) ; walls 

 of the test of firm consistence, rough, without external fine cement, 

 subdivided irregularly by a labyrinth of sand-grains cemented 



