Mr. T. Davidson on the Brachiopoda of the Maltese hlanis, 5 



surement, and, considering the amount of degradation and denu- 

 dation to which its surface has been exposed, the average here 

 given is perhaps far under the original thickness of the deposit. 



Description of the Brachiopoda. 

 By Thomas Davidson, F.R.S., F.G.S. &c. 



Some short time ago. Dr. Leith Adams, who has devoted 

 three years to the careful study of the geology of the Maltese 

 Islands, forwarded for my examination and description a very 

 interesting series of the Miocene Brachiopoda he had been able 

 to assemble, which, I believe, may be re/erred to the following 

 seven species : — 



1. TerebrmtmU ma o M , Broeefai (perhaps 



s Tsriety of T. amnuUa) 



2. Terebratula minor, Ptulippi (perhaps 



a sniall variety of T. mtrtm) 



3. TerebratmUma cmpml-mrptrntis, Liaa. . 



4. MegtrUm trmtMiMt Lum. 



5. Arfieme ieeotUU, Chcmoiu 



6. TkecCHmm Admmai, Macdonald. 



7. AAyadboMlIa ^Mrfifa, Broeehi . . . . 



II. 



III. 



IT. 



▼. 



Of theae seven species, font (nos. 2, 8, 4, & 5) are also found 



recent in the Mediterranean. 



In ' The Geologist' for December 1862, 1 described and figured 

 (pi. 24. fig. 19), under the denomination of WaUkeimia Garu 

 baldiana, a very fine new species which Mr. Etheridge assures 

 me he had received from Malta ; but, as not a trace of this shell 

 has been discovered in that island, it will not be reproduced in 

 the present paper. Through the kindness of M. Micliciotti of 

 Turin, Prof. Aleneghini of Pisa, and Prof. Sequenia of Messina, 

 I have been able to compare our Maltese specimens with those 

 fouud in formations of a similar age in Italy, and am also in- 

 debted to those gentlemen for much interesting information in 

 connexion with their local distribution*. 



* Several British pelgontologists are »t presesk esgafred in the study of 

 Maltese Mioeene fotsiU. Dr. Wright has prepared a \ ' uemoir on 



the Echinodermata. Mr. Rupert Jones has published an u' account 



of the Poraminifera in the April (1864) Number ol i in- tieologist,* 

 whert*in miicli valuahle information will be found ; and I am moreover in- 

 formed that the Brjozoa and Corals will be shortly published. 



