184 CO. F. LASERON. 
accentuated by Robt. Etheridge junr.,! was the presence 
of the celluliferous surface on the interior of the cup-shaped 
colony. Later Waagen and Pichl,*? working on the Indian 
Carboniferous forms, asserted that this character in itself 
is not of importance, and depended on the direction in 
which a young fan-shaped colony twisted to eventually 
become cup-shaped. 
In 1894, G. B. Simpson,* revising the genera of Fenes- 
tellidsee, makes no mention of Protoretepora at all, but 
creates a new genus, Flabelliporella, to comprise species 
of Polypora, witha flabelliform or fan-shaped habit, retain- 
ing the name Polypora for the cup-shaped species. At the 
same time he restricts Fenestella to cup-shaped forms, 
while another new name, Flabelliporina, is used for fan- 
shaped species previously comprised in that genus. This 
is perhaps unfortunate, especially in the case of Polypora, 
for McCoy, in describing his genus, particularly mentions 
that species are fan-shaped, so that if a new genus is 
necessary at all, it would have to apply to the cup-shaped 
species, and in this case the term Flabelliporella would be 
very contradictory. Simpson’s new genera seem for the 
most part very theoretical, and he does not mention what 
species come under their heads, a fact recognised by Nichols 
and Ulrich,* who in 1900, synonymised Flabelliporella under 
the original Polypora, In the same paper these authors 
synonymised Protoretepora under Polypora, a course pre- 
viously followed by Waagen and Pichl, but the justification 
of this yet remains to be proved, 
Considering the Australian species at my disposal, two 
species are undoubtedly congeneric with Protoretepora, of 
which one, P. ampla is the type species. After referring 
1 R. Etheridge junr., (13) p. 220, 221. 
2 Waagen and Pichl, (8) p. 775. 
3 G. B. Simpson, (12) pp. 879 - 921. 
* Nichols and Ulrich, (15) p. 39. 
