318 Revieivs — Wachsmuth 8^ Springer's Monograph on Crinoids. 



maps. While this revision is in progress advantage is taken of the 

 re-examination of the ground to make any needful additions or 

 modifications in the " solid geology." The work is reduced from the 

 large field-maps to the new series of the one-inch map. Geological 

 maps on the six-inch scale were formerly published for the mineral- 

 fields, but are now no longer engraved, though a large number 

 of sheets of the coalfields are on sale. But manuscript copies of 

 six-inch maps relating to any parts of the country of which the one- 

 inch sheets are published, are supplied to the public at the cost 

 of manual transcription. 



While the field-work is in progress the surveyors collect, for the 

 purposes of their maps and explanatory memoirs, such specimens 

 of minerals, rocks, and fossils as may be found to require special 

 examination. But a more systematic collection is carried out under 

 their supervision by the collectors, for study by the petrographers and 

 palgeontologists and for exhibition in the museums. Each branch of 

 the Survey has one or two collectors, who move from district to 

 district as their services are required. When one of them begins 

 work in any area, he is supplied with a map on which the field- 

 officer who surveyed it has marked every locality that should be 

 searched, and also with a list of these localities, giving local details 

 as to the rocks to be specially searched or examined, and the kind of 

 specimens to be looked for and collected. When necessary, the 

 surveyor accompanies the collector to the ground and starts him 

 on his duties. Every specimen which the collector sends up to the 

 office has a number affixed to it, and is entered in the lists, which are 

 also at the same time transmitted to headquarters. The specimens 

 are then unpacked and treated by the palaeontologists or petro- 

 graphers, as the case may be. In this manner a remarkably 

 complete illustration of the geology of the United Kingdom has been 

 accumulated by the Survey, and it is constant!}'- receiving additions 

 and improvements. The chief series is deposited in the Museum of 

 Practical Geology, London ; but the geology of Scotland is most 

 fully represented in the Museum of Science and Art in Edinburgh, 

 and that of Ireland in the corresponding Museum at Dublin. 



( To be continued. ) 



I^ E "V I IE "VT" S. 



I. — Wachsmuth and Springer's Monograph on Crinoids.^ 

 Second Notice. 



BEFORE entering on the discussion of morphological questions, 

 the authors very properly define the terms they propose to use. 

 Since all these terms will be familiar to those who have followed the 

 papers of Messrs. Wachsmuth and Springer, P. H. Carpenter, and 

 myself, only a few remarks are needed. 



1 The North American Criuoidea Camerata. By C. Wachsmuth and F. Springer. 

 Mem. Mus. Comp. Zool. Harvard, vols, xx and xxi, containing 838 pp. and 83 plates. 

 (Cambridge, U.S.A., May, 1897.) For First Notice, see June Number, p. 276. 



