22 Annals of the South African Museum. 



African Museum, principally comprising specimens presented by 

 E. Eubidge and C. A. Fairbridge, and I have also received a small 

 but interesting collection of Mollusca found by Miss M. Wilman in 

 the Uitenhage strata exposed in the Coega neighbourhood. In addi- 

 tion to the marine fossils obtained by Messrs. Eogers and Schwarz, 

 some shells of the genus Unio were collected in the Bezuidenhout's 

 YaUey below Blue Cliff. 



In 1905 Mr. Eogers devoted some time to a further examination 

 of the Uitenhage beds in the valleys of the Sunday's Eiver and 

 Coega Eiver, and made an additional collection of fossils ; he also 

 obtained a few specimens from an exposure of Uitenhage beds at 

 Brentford, in Knysna.* The results of an examination of these 

 supplementary materials have been incorporated in the following 

 account, which has been withheld from publication for this purpose. 



In view of the extensive manner in which the fauna of the Uiten- 

 hage Series has already been made known, particularly by the 

 writings of Krauss, Sharpe, Tate, and Neumayr, it is not surprising 

 to find that among the specimens collected during the preliminary 

 survey in the Uitenhage and Port Elizabeth Divisions comparatively 

 few new forms are represented. It could be gathered, however, 

 from the published account of this survey,! that more prolonged 

 search would in all probability add materially to an already lengthy 

 list, and, in fact, the specimens obtained by Mr. Eogers in 1905 well 

 bear this out, for they include a larger proportion of new species 

 than that shown by the collections made in 1900. J 



In the following pages I have discussed the present state of our 

 knowledge regarding the palaeontological relations of the fauna, so 

 far as concerns the invertebrate remains, and then proceeded to the 

 description of the new materials submitted to me, while adding 

 critical remarks and supplementary descriptions relative to some of 

 the forms already known. Opportunity is also afforded by the pre- 

 sent study to describe and figure two Uitenhage ammonites which 

 are represented by specimens preserved in the collection of the 

 Geological Society of London, though not included in the material 

 sent to me from Cape Town ; it is useful to have some account of 

 these, both for the sake of comparison with other members of the 



* A new locality for Uitenhage marine fossils ; see Schwarz (2), pp. 50, 74. [The 

 numbers in parentheses after the names of authors, in this and subsequent refer- 

 ences to literature, correspond with the titles of works bearing the same number 

 under the names of those authors in the bibliographical list with which this memoir 

 concludes.] 



f Eogers and Schwarz (1). 



J For an account of the survey of 1905, see Eogers (2). 



