Palaeozoic Corals from Northern Queensland. 285 



far as we are acquainted with their fauna, they would seem 

 to correspond very closely with the Middle Devonian Lime- 

 stones of the Eifel, or perhaps with the somewhat older series 

 of the Corniferous Limestone of North America ; but we do 

 not doubt that large additions will yet be made to the list of 

 fossils from these beds, when it will be possible to compare 

 them more closely with the corresponding deposits in Europe 

 and North America. 



In conclusion, we may at once state that our investigations 

 amongst the corals of the Broken-River and Arthur's-Creek 

 Limestones of North Queensland quite enable us to confirm, in 

 a general way, Mr. Etheridge's opinion of the former series, 

 that " their age is undoubtedly Lower Devonian or l Siluro- 

 Devonian.' " 



EXPLANATION OF PLATE XIV. 



Fig. 1. A fragment of Stcnopora ovata, Lonsd., of the natural size. 1 a. 

 Side view of three corallites of the same, in the outer portion 

 of their course, enlarged, showing the periodic thickenings of 

 the tubes. 1 b. Part of a tangential section of the same, taken 

 just below the surface, and enlarged twenty-five times, showing 

 the hexagonal corallites and the ring-like deposit of scleren- 

 chyma in the interior of many of the tubes. 1 c. Part of a 

 vertical section of the same, enlarged twenty-five times, show- 

 ing the periodical thickenings of the tubes, the remote tabulae, 

 placed at corresponding levels in contiguous tubes, and the mural 

 pores. Id. Part of a transverse section of Stenopora crinita, 

 Lonsd., enlarged ten time.-*, showing the ring-like sclerenchyma- 

 tous deposit in the tubes, introduced for comparison with 1 b. 



Fig. 2. A small portion of a transverse section of Heliolites plasmopo- 

 roides, nobis, of the natural size. 2 a. Part of the same section, 

 enlarged five times. 2 b. Part of a vertical section of the same, 

 enlarged five times, showing that the tabulae of the smaller 

 tubes have the characters of those of Heliolites and not of those 

 of Plasmopora. 



Fig. 3. Part of the surface of Heliolites Daintreei, nobis, of the natural 

 size, showing the proportions and relative positions of the large 

 corallites. 3 a. Part of a transverse section of the same, en- 

 larged five times. 



Fig. 4. A small fragment of Pachypora meridionalis, nobis, of the natural 

 size. 4 a. Portion of the surface of the same, enlarged five 

 times. 4 b. Tangential section of the same, enlarged ten times, 

 showing the thickened walls of the corallites. 4 c. Part of a 

 longitudinal section of the same, enlarged ten times, showing 

 the thickening of the tubes near their mouths. In the portion 

 of the section represented, the visceral chambers of the corallites 

 are filled with matrix, rendering it impossible to recognize the 

 tabulae or mural pores. 



Ann. <fc Mag. N. Hist. Ser. 5. Vol. iv. 20 



