Bibliographical Notice. 539 



5. Iladrocnemus Unuicornis, Kr. (?) (p. 62), from Bismarck- 



burg. Not recognizable from tiie $ only. Possibly a 

 near ally o£ Ilajyalochrus Jilicornis, Champ., from N. 

 Ehodesia. 



6. Hiidrocnennis viridis, Kr. ( ? ) (p. 62), from Bismarckburg. 



Tliis may be sjnonymous with Hapalochrus Jissipes, 

 Cliamp., types ( ^ ? ) f loin the Congo, but in the absence 

 of the $ of H. viridis nothing definite can be stated. 



7. Iladrocnemus spectahilis, Kr. ( c? ? ) (p. 271), from Niger- 



^en\]iQ=- Hapalochrus constr'utipes, Champ, (sp. no. 15). 

 The name s2:)ectabiUs was used by Ancey in 1883 for 

 another species of the same section of the genus, and 

 that of Kraatz must be sunk as a synonym. 



8. Iladrocnemus 4:-pusti(latus, Kr. (^J) (p. 272), from Niger- 



\li'n\ie = Hapalochrus nobilis, Er. (181:3) (sp. no. 4 of 

 my paper), the type of which was a ? . 



BIBLIOGliAPHICAL NOTICE. 



Monograph of the Lacertida). By G. A. Boulengeh. Vol. I. 

 British Museum (Natural History). 1920. Pp. x + 352. Price £2. 



This Monograph ditfers in plan from the other Catalogues issued by 

 the Natural History Museum iu recording, ou a scale not hitherto 

 attempted, the range of variation in each of the species. This is 

 done, not only by the definition of uamed varieties where these can 

 be recognized, but also by full descriptions of the variations of 

 coloration and markings and by tabulation of the measurements 

 and lepidosis of all the specimens examined. The vast extent of 

 the material dealt -with is shown by the fact that of the single 

 species Lucerta murulis with its thirty-one named varieties the 

 tables give particulars of about twelve hundred specimens. The 

 present volume deals only with the three genera JS'ucras, Lucerta, 

 and Ahjiroides — the remaining genera, nineteen in number, being 

 reserved for the second volume, which is stated to be ready for 

 printing. 



The importance of this work does not lie only in its wealth of 

 descrii)tive detail. In a series of memoirs published in the ' Trans- 

 actions of the Zoological Society ' and elsewhere, the author has 

 expounded his views on the evolution of the Lacertida), and ho 

 here presents in systematic form the final results of his researches. 

 Starting from the principles laid down in Eimer's well-known work 

 on the evolution of markings in the wall-lizunl, and combining 

 with these a close study of structural characters for the most part 

 neglected by Eimer, Dr. Boulenger has been able to map out a 

 phylogcnetic scheme for the whole family, to present a rational 

 arrangement of the bewildering variety of forms presented by somo 



