THE 



GEOLOGICAL MAGAZINE. 



NEW SERIES. DECADE V. VOL. II. 



Ho. II. — FEBRUARY, 1905. 



0:RX<3rXl<Tj^lL. J^IRTXCXjJSS. 



I. — Note on the Age and Locality of the EsthebiellA'^ukl^b 



FBOM THE Malay Peninsula, 



By R. BuLLEN Newton, F.G.S. 



ME. JOHN B. SCEIVENOR, B.A., F.G.S., Geologist to tbe 

 Federated Malay States, has forwarded to me for determination 

 several pieces of a dark-greyish argillaceous shale, largely charged 

 with particles of mica and valve-impressions of a small phyllopodous 

 Crustacean, which he has discovered in the Native States of the 

 Malay Peninsula. 



In his letter Mr. Scrivener remarks : " The fossils that I send 

 were found by myself on the surfaces of a series of shales and sand- 

 stones, practically vertical and striking N.N.E.-S.S.W., at Pukus 

 Semanggol, Larut, Perak. This series is of enormous extent; 

 I have traced it over 180 miles north and south along the railway. 

 So far no fossils whatever have been found in them, that I know of, 

 in the Western States." 



Before attempting to describe these fossils myself, I thought it 

 desirable to submit them to Professor T. Eupert Jones, F.E.S., our 

 principal authority on the fossil Phyllopoda ; and he, fortunately for 

 science, has taken so keen an interest in the specimens that he has 

 carefully diagnosed their characters in a systematic description, and so 

 made a valuable contribution to the palaeontology of this little-known 

 area of the Oriental region. Professor Eupert Jones' examination 

 enables him to state that the shales contain only one form of this 

 curious group of Crustaceans, which he refers to a new variety 

 of an already described species from the Triassic rocks of Sicily 

 known as Estheria radiata of Salinas. As the adult specimens 

 exhibit radial as well as concentric sculpture, Professor Jones 

 places this species under the generic name of Estheriella. From 

 a stratigraphical point of view this determination is most satis- 

 factory, as it furnishes additional evidence of the presence of the 

 Trias formation in the Malay Peninsula, marine Triassic shells having 

 already been reported by me from that country (Proc. Malacol. Soc. 

 London, 1900, vol. iv, p. 130, pi. xii). It is interesting to note 

 that the genus Estheriella, originally established by Weiss for species 

 peculiar to the Bunter Sandstone of Diirrenberg, in Saxony, so far as 

 can be ascertained, is only known to have existed in Triassic times. 



DECADE V. — VOL. It. — NO. II. 4 



