260 PROCEEDINGS OF THE GEOLOGICAL SOCIETY. [Nov. 30, 



character. These exceptions are, — first, a deposit composed of fine 

 particles of sand and broken fragments of shells such as would arise 

 from detritus brought along by a deep sea- current. The rock is 

 stratified in a manner which fully bears out such a view. I believe 

 that this formation covered nearly, if not quite, the whole of the 

 limestone, but has afterwards been washed away by denudation, to 

 which its friable texture would render it extremely liable. There is 

 always more of it near the coast, and there in some places it is 200 

 feet thick. Elsewhere it is only in patches lying on elevated spots 

 of ground, and apparently much water-worn. 



A ridge of coarse limestone follows the line of coast; and in 

 this, as well as in the limestone some few miles further inland, fossils 

 abound ; but they are all of species at present inhabiting the coast. 

 This is the result of upheaval which appears from observation to 

 continue to this day. It is worthy of notice that volcanic emana- 

 tions occurred during the period of upheaval ; and it would appear 

 probable, from shocks of earthquakes that are occasionally felt, that 

 the cause of them is yet in existence. 



Note on the Fossil Poltzoa collected by the Rev. J. E. Woods near 

 Mount Gambles, South Australia. By George Busk, Esq., 

 F.R.S., F.G.S., Ac. 



The Polyzoa included in this collection belong to fifteen or sixteen 

 genera, of which four are probably new ; and the number of species 

 is about thirty-nine or forty, of which at least thirty- six seem to be 

 undescribed. Among them are several very peculiar and character- 

 istic forms, especially in the genus Gellepora. Taken as a whole, 

 these fossil forms exhibit such generic and specific types as to render 

 it probable that the formation in which they are found corresponds, 

 in point of relation to the existing state of things, with the Lower 

 Crag of England, although the collection contains but one or two 

 species which can be referred, and those even doubtfully, to any 

 belonging to the Crag. It is remarkable, however, that it presents 

 a second species of Melicerita, which genus is peculiar to that deposit. 

 Of the characteristic Fascicularice and other Theonidce of the Crag 

 no trace exists in the present collection. The most characteristic 

 form is a large and massive Gellepora, for which I propose the name 

 Cellepora Garnbierensis. 



List of Genera and Species. 



I. P. CHEILOSTOMATA. 



1. Salicornaria, Cuvier. 3. Onchopora, BwsTc. 



1. S. sinuosa, Hassall. 1. 0. pustulosa, n. sp. 



2. S. Parkeri, n. sp. 4. Membranipora, Blainville. 



2. Can da, Lamcc. 1. M. stenostoma, Busk. ? 



1. C. angulata, n. sp. 2. M. bidens, Hag. 



