of the Rocks associated with the Coal of Australia. 227 



Cladochonus (M'Coy), new genus. 

 (Etym. tcXd&os, a branch, and %wv^ a funnel.) 



Gen. Char. Polypidom of very thick, straight, slender, calca- 

 reous tubes, suddenly dilating at short regular distances into 

 large, oblique, cup-shaped terminal chambers, longitudinally 

 striated within; from the point where the dilatation commences, 

 a second slender tube similar to the first is given off at an 

 angle varying with the species, and terminating at the same 

 distance as the fornler in a similar cup, bent in nearly an op- 

 posite direction to the first, and giving rise at its base to a 

 third slender tube as before. The whole polypidom erect, 

 attached by the base only, which embraces some foreign body. 

 These singular and beautiful corals have some relation to 

 Aulopora, but differ in their curious erect habit, regular, angular, 

 mode of branching, slender, equal, stem-like tubes and abruptly 

 dilated terminal cups bent in nearly opposite directions. The 

 Aulopores are attached for the most part by one side ; the tubes 

 gradually expand to the mouths, which all open nearly in one 

 direction ; they have no regular distance for branching and fre- 

 quently anastomose. The present corals have also much thicker 

 walls to the tubes, the central hollow being proportionally very 

 small. I formerly described some species of this group under 

 the genus Jania, being uncertain where to place them ; such are 

 the J. crassa and J. bacularia of the ' Synopsis of the Irish Carb. 

 Limestone Fossils/ which should now be removed to this genus. 



Cladochonus tenuicollis (M'Coy). PI. XI. fig. 8. 

 Distinguished by the slenderness of the stems. Common in 

 the Dunvegan shale. 



Strombodes ? Australis (M'Coy). PI. XL fig. 9. 

 I have given the above name provisionally to a species of 

 Strombodes from the calcareous shale of Wagamee, N. S. Wales, 

 having the precise form of the Turbinolia fungites of British 

 writers. It is certainly without transverse chambers, having the 

 vertical lamellae twisted about the centre ; the lamellae are about 

 thirty-six in number, all reaching the centre, though grouped 

 in irregular bundles as they approach it. The section is slightly 

 oval, the lamellae in the direction of the long axis being straight, 

 those of the sides much arched. The external surface is striated 

 longitudinally, the striae being double the number of the lamellae. 



Turbinolopsis bina (Lonsd.). 

 Agreeing minutely with Devonshire specimens. Rare in the 

 shale of Dunvegan, N. S. Wales. 



