2 Annals of the South African Museum. 



between the two families ; and thus it shows the probability of 

 the present classification of the Cyclostome Polyzoa being highly 

 artificial. But until the distribution and life history of each 

 described form has been determined, it is impossible to form a 

 natural classification of the whole. Meanwhile, the present 

 artificial classification must be used for lack of better. 



FILISPABSA KAMOSA, d'Orbigny. 



Plate I., fig. 1. 



1853. Filisparsa ramosa, d'Orbigny, Bry. Cret., p. 819, pi. 756 

 figs. 18-22. 



Zoariurn of erect, flattened, solid branches, in one plane. Zooecia 

 only opening on one face of the zoarium. Apertures tend to arrange- 

 ment in V-shaped bands across the zoarium, but their distribution 

 is somewhat irregular ; four or five in a series ; distance between 

 apertures of the same series one-half times to once the diameter 

 of an aperture ; between apertures of neighbouring series twice to 

 four times. Zooecia immersed. 



There are three fragments of this species, one of which is 

 figured. 



Distribution. Turonian and Senonian. 



FILISPABSA FBAGILIS, Marsson. 



Plate I., fig. 2. 



1887. Filisparsa frayilis, Marsson, Bry. Eiig. ; Pal. Abh., vol. iv., 

 p. 35, pi. iii., fig. 8. 



Zoarium of erect, cylindrical, or slightly flattened solid branches, 

 in one plane. Zooecia only opening on one face of the zoarium. 

 Apertures arranged in single series across the zoarium ; four or 

 five in a series ; distance between apertures of the same series 

 one-half times or less the diameter of an aperture ; between those 

 of neighbouring series twice-and-a-half to thrice. Zooecia immersed, 

 but the boundaries between them are more or less apparent as 

 ridges. One fragment out of seven is figured. 



Distribution. Senonian. 



GENUS DIASTOPOEA, Lamouroux. 



Diastopora is here used, as in the British Museum Catalogue, for 

 Diastoporidse with an erect uni-, bi-, or even multi-laminar zoarium, 

 consisting of fronds or of very flattened branches. 



