326 Revieivs — Buckman on Brachiopocla. 



Professor Heddle, has compiled a list of the mineral species whicht 

 have been found in each of the counties of Scotland ; Mr. James 

 Currie has prepared a list of Scottish Pseudomorphs, and an index 

 of Scottish paleeosomatic minerals ; Mr. J. G. Goodchild has added 

 an alphabetical list of minerals, indicating by means of asterisks 

 those which occur in Scotland, and has further prepared a series of 

 beautiful gnomograms and stereograms of the crystallographic forms 

 of the more common mineral species. 



The result is the issue of the two fine volumes now before us ^ 

 the book is well printed, and illustrated regardless of expense ; an 

 excellent portrait of the author is given as frontispiece, and is 

 followed by a short memoir. No more impressive memorial of 

 Dr. Heddle could have been devised by his family. 



The work is of course of the dictionary type, and designed, not 

 for continuous reading, but for the purposes of reference ; its 

 usefulness depends, to a large extent, on the completeness and 

 accuracy of the specification of the localities. No pains have been 

 spared over this part of the book ; all the places mentioned in 

 Dr. Heddle's notes have been identified as far as possible, a tedious 

 task, involving much difBculty and enquiry when the localities are 

 remote from railways, are not recorded on the best maps, and are 

 represented by names of which there is much diversity of spelling. 

 Fortunately, Dr. Heddle had left a set of Ordnance Survey Maps, 

 on which his annual wanderings had been traced ; with the help of 

 these, and much aided by the wide information of Mr. James Currie, 

 Mr. Goodchild has prepared a Synonymic Index (33 pages) to the 

 Scottish Mineral localities, specifying for each locality the position 

 on the Ordnance Map and the names of the mineral species to be 

 found there. 



The numerous plates illustrating the forms of crystals have been 

 prepared at great cost, and they add to the beauty of the volume ; 

 but Dr. Heddle left behind him no information as to whether the 

 figures were original or not. Some, at least, were doubtless taken 

 from works illustrating the minerals of other countries, though 

 probably they at the same time illustrate Scottish minerals preserved 

 in his own collection. 



It should be mentioned that in the text there are numerous 

 illustrations of agates, to the mode of origin of wbich Dr. Heddle 

 had given much study. 



It would add to the usefulness of the work if in a subsequent 

 edition an alphabetical index to the mineral species and varieties, 

 with page-references, were placed at the end of it. 



II. HOMCEOMORPHT AMONG JuRASSIC BrACHIOPODA, By S. S. 



Buckman. Proc. Cotteswold Naturalists' Field Club, 1901, 

 vol. xii, pt. 4, pp. 231-290, pis. xiii-xiv. 



IN this paper Mr. Buckman performs a welcome service by drawing 

 attention to the occurrence of what he terms ' homoeomorphy * 

 in Jurassic Brachiopoda. The part played by parallelism in 

 producing striking similarities between members of separate^ 



