1 PROCEEDINGS OF THE GEOLOGICAL SOCIETY. 



vious visitor ; he also corrects some errors of nomenclature which 

 had crept into former notices, and refers to some discussion which 

 had arisen respecting the authenticity of certain specimens. He 

 also observes that the Spirifera Rajah, supposed to be identical with 

 S. Keilhavii, does not occur in the same beds with Triassic Ammo- 

 nites, but in beds decidedly below them, and is therefore probably of 

 the same relative age as the " Carboniferous " of Europe. The 

 work is illustrated by 23 plates of fossils, in which all the new 

 species are engraved. 



Another volume of the works of the Palseontographical Society 

 has been published during the past year (vol. for 3863), containing 

 portions of four monographs. The first is the continuation of Mr. 

 Salter's "Monograph of British Trilobites," and specially the second 

 part, which contains the Silurian and Devonian forms, with 8 

 plates. The genera here discussed are — Amphion, Staurocephalus 

 3 sp., Deiphon 1, Galymene 9, Homalonotus 13. The author then 

 commences the group of the Asaphidce, of which only one species 

 of the genus Ogygia is here described. 



The next work is the second portion of the sixth part of Mr. Da- 

 vidson's " Monograph of British Brachiopoda," viz. the Devonian, 

 with 11 plates. The genera described in this part are — Atrypa 3 sp., 

 Rliynchonella 16, Camarophoria 1 (Mr. Davidson is disposed to con- 

 sider this to be the same species as Prof. Phillips's Terehratula rhom- 

 boidea and the Permian form C. glohulina, Schlot.), Pentamerus 2, 

 Davidsonia 1, Strophomena 1, StreptorhyncTius 4, Leptcena 3, OrtJiis 

 5, Chonetes 2, Strophalosia 1, Productus 4, Dischm 1, Lingula 1, 

 Galceola 1. In concluding this monograph Mr. Davidson observes 

 that 91 so-called species have been described and illustrated, but 

 of these only Qb have been named with certainty; 14 more are 

 probably good species, but they are not yet sufficiently made out ; 

 the remaining 12, indicated merely for the sake of reference, will 

 probably have to be placed as synonyms of some of the other 79 

 species. He then points out which of these species extend up- 

 wards into the Carboniferous beds, and concludes with some inter- 

 esting observations on the geological, geographical, andpalaeonto- 

 logical distribution of the species, and on the sequence of the dif- 

 ferent beds of the Middle Devonian group, which, as well as those of 

 the Lower Devonian, are extremely comphcated. 



The third paper in this volume is the commencement of a valuable 

 " Monograph of British Belemnitidse," by Prof. Phillips. His memoir 

 commences with an historical account of the progress of discovery 

 respecting this group of Cephalopoda from the time when Belem- 

 nites were first so called by Georgius Agricola in 1546, when [they 

 were considered as of animal origin, do^Ti to the period of the more 

 recent discoveries of Buckland, Owen, and Mantell, when their true 

 place in nature, as belonging to the great family of Cephalopoda, was 

 satisfactorily established by the discovery of specimens in which the 

 fossil ink-bag and other characteristic parts of the animal and its 

 sheath have been preserved. 



Prof. Phillips then proceeds to describe the structure of the Be- 



