Bevieirs — Life and Letters of P. and 8. Lesley. 517 



The black shales have yielded the following considerable series of 

 graptolites, which have been kindly determined bj' Miss G. L. Elles, 

 D.Sc., and indicate the zone of Didymograptm extensus. The associated 

 cherts contain radiolaria : — 



Graptolites from the Arenig Beds of Glensaul. 



Dictyonema , sp. Thammograptus , sp. 



A Dendrogi'aptid. Didymograpttts extensus, Hall (common). 



Tctr a graptus pendens, Elles. D.jUKformis, Tullberg. 



T. Amii, Lapworth M.S. B. fasciculatus, Nich. 



T. quadribrachiatits, Hall. D. bijidus, Hall. 



Clonograptus Lapicorthi, Rued. D. gracilis, Tornquist. 



In. the Llandeilo rocks, both limestone and tuff, a large number of 

 generally rather fragmentary fossils was found, which are being 

 determined by Mr. P. E. Cowper Reed. 



The crystalline igneous rocks, all of which we believe to be 

 intrusive, are by no means so varied as in the Tourraakeady district, 

 and are practically limited to one broad band of felsite, which is 

 noteworthy from the fact that it almost everywhere contains pyroxene. 



The district is much faulted, large faults bound it on the east and 

 west, a somewhat complicated system of faults approximately parallel 

 to these bounding faults intersects it, and there are other dislocations 

 of importance. 



■JR-E.-^rXl^-^'TT-^. 



I. — Life and Letters of Petek and Susan Leslet. Edited by 

 their daughter, Mary Lesley Ames. 2 vols. 8vo ; pp. xii, 526, 

 and V, 562, with 16 portraits, 17 sketch illustrations, and geological 

 map, New York and London : The Knickerbocker Press (Gr, P. 

 Putnam's Sons), 1909. 



PETER LESLEY, the fourth in succession of that name, was born 

 in Philadelphia on September 17, 1819, and died at Milton, near 

 Boston, on June 1, 1903, in his 84th year. His great-grandfather 

 belonged to Scotland, and was known as the "Miller of Fifeshire ". His 

 grandfather (Peter the second) settled in Boston, U.S.A., as a cabinet- 

 maker, and his father (Peter the third) succeeded to this business. 

 Peter the fourth, however, did not like his Christian name, and while 

 during his father's lifetime he signed his name " Peter Lesley, Jr.", 

 he subsequently transferred the J to the front, and became J. P. Lesley, 

 in which form his name has been familiar to geologists. 



In an interesting and appreciative obituary memoir, which formed 

 part of the anniversary address delivered by Sir Archibald Geikie as 

 Vice-President of the Geological Society in 1904, J. P. Lesley was 

 described as "one of the most distinguished and lovable men of 

 science in the United States"; and in the two volumes before us 

 ample testimony is given of the justice of those words. 



In earlj' years Lesley received from his father, who was a man 

 of high principle and wide culture, a valuable training in mechanics, 

 in perspective and machine drawing; he was sent to the best schools, 



