Falceozoic Corals from Northern Queensland. 225 



a good deal of resemblance between our H Daintreei and H. 

 piriformis, Lonsdale, as figured by Hall from American spe- 

 cimens ; but the other characters are quite dissimilar. 



Locality and Horizon. Broken River, North Queensland, 

 as a rolled block. 



Collector. The late R. Daintree, Esq. 



Heliolites, sp. ind. 



Obs. A third and small species of Heliolites is represented 

 by a single example nestling in the middle of a large block of 

 Fanosites. The calices and coenenchymal tubuli are very 

 small, the latter so much so that the use of a lens is required 

 for their detection. The corallites are circular and possess 

 very thin and thread-like margins, and they are separated 

 from one another by intervals of ccenenchyma of some extent. 



The tubes of the latter are very small and almost micro- 

 scopic, hexagonal or polygonal. 



In a vertical section the structure is characteristically 

 Heliolitiform. In the interspaces between the corallites the 

 small square cells, making up the cosnenchyma, are quite 

 apparent, but rather unequal in size. The tabulge in the 

 corallites are moderately close and horizontal. 



We have observed traces of very small septa remaining in 

 one or two of the corallites ; but their structure is so deli- 

 cate and minute that their preservation is surprising. We 

 think it very probable that this is an undescribed minute 

 Heliolites ; but as we have only one example before us, we 

 refrain from committing ourselves to a name. It appears to 

 be smaller in general than any of the commoner species of 

 Heliolites known to us, especially as regards the size of the 

 coenenchymal tubes. 



Locality and Horizon. Broken River, North Queensland, 

 in a large block of Favosites. Limestone of Devonian age. 



Collector. The late R. Daintree, Esq. 



Heliolites plasmoporoides, Etli. Jim., and Nicholson, sp. nov. 

 (PI. XIII. figs. 2, 2 b.) 



Spec. char. Corallum irregularly ovate ; upper surface 

 convex. Calices circular, with a thin thread-like margin, 

 average diameter 1^ line, contiguous, but separated from 

 one another by small interspaces of coenenchymal tubuli. 

 The latter are large and of very irregular form : some are 

 elongate, with one axis much longer than the other ; others 

 are polygonal ; and, again, others are without definite outline. 

 Between contiguous corallites there is usually but one row of 

 large oblong interstitial tubes, reaching from calice to calice ; 



