Reviews — Dr. Anton Fritsch's Palwozoie Arachnida. 471 



The palaeontological nomenclature claims to be brought up to 

 date. In the phytological portion this it must be admitted has been 

 <lone — Seward's Catalogue lias very properly been followed ; but 

 in the zoological part it can hardly be granted. We might suggest 

 that, as authors of such memoirs cannot possibly be specialists in 

 -all branches of nomenclature, they would be well advised to follow 

 the latest text-book. They might reasonably plead "Theirs not 

 to reason why," and simply trust the specialists who had contributed 

 to the text-book : on these specialists would fall praise or blame as 

 the case might be. Such a text-hook we have now in the Enstman 

 translation of Zittel ; but, tested by that, the nomenclature in this 

 memoir is certainly not up to date. For instance, generic names 

 which have been discarded from the text-book on account of prior 

 use, meet us throughout the pages of this memoir, while names 

 which have been in use for many years, and are to be found even in 

 the old Zittel of twenty years ago, are lacking. Only the Ammonite 

 names seem to be up to the modern standard, tested by Eastman, 

 but there is one failure here, viz., the figure given as Ammonites 

 Jizimpliriesianus, on p. 13, is not that species, for it was separated by 

 Oppel some fifty years ago, and taken by him as the type of his 

 A. bayleanus. We are credibly informed, and Oppel himself says 

 the same, that the species does not occupy the same zone as 

 A. Jiumphriesianus. It is, therefore, very doubtful if this figure 

 represents a fossil which occurs in Yorkshire at all. It clearly 

 proves the necessity of illustrating each memoir with special figures 

 taken from actual local fossils. 



When the reader has been safeguarded in reference to such matters 

 as these to which we call attention, then he will find the memoir 

 an extremely interesting and useful guide to a very important 

 district. A. B. L. 



IV. — Palaeozoic Arachnida. By Professor Dr. Anton Fritsch. 

 4to, with pp. 88, 15 plates, and 99 figures in the text. (Prag, 

 Selbstuverlag, Fr. Eivnac, & Buchdruckerei Dr. Ed. Gregr a Syn, 

 1904. See also Sitzungsber. k. Akad. Wiss. Wien., cxii.) 



THIS work forms one of a series of Memoirs to the preparation of 

 which Dr. Fritsch has devoted so many years of his long and 

 laborious life in illustration of the fauna of the Coal-formation of 

 Bohemia. 



In the present monograph, which is published under the auspices 

 of the Imperial Academy of Vienna, the author has extended the 

 field of his researches, and examines and describes and figures the 

 fossil Arachnida in the Museums of London, Paris, Dresden, Breslau, 

 and Vienna, visited by him in 1903, in order to embrace the whole 

 of the known forms of palaeozoic Arachnida from all countries. 



The 15 quarto plates and the greater number of the 99 illus- 

 trations in the text are drawn by the author's own hand. 



Thirty-nine^ genera and 67 species of Arachnida are here recorded 



' One genus and species, Adelocaris peruvianus, should be cancelled : see p. 473, 

 m. 28.— H. W. 



