BihliograjjMcal Notices. 305 



Copenhagen, Berlin, and Stuttgardt, he has been enabled to present 

 an exceedingly full account of the anatomy of these hitherto little- 

 known animals, in which very many new facts will be found, but 

 which space forbids us to extract. The diagnoses are all in Latin, 

 as well as the explanation of the plates (nine in number), containing 

 anatomical details. 



M. Strom's papers on Danish Lepidoptera (iii. pp. 1 & 107 ; iv. 

 p. 381) contain several observations of more than merely faunistic 

 interest, of which we can only find room for one. He points out 

 a gradual degradation, as it were, in the females of Orgijia antiqua, 

 gonostigma, and Ericce, corresponding to peculiarities in their deve- 

 lopment, the antennae being dentated in the first, crenulated in the 

 second, but much shorter and merely filiform in the third ; the rudi- 

 mentary wings are closely covered with hair in the first, sparsely 

 haired in the second, exceedingly smaU and naked in the third ; 

 and the legs show a similar gradation. Accordingly he has found 

 that the female of 0. antiqua entirely disengages herself from the 

 double cocoon, and places her eggs on the outside of it ; whilst that 

 of 0. gonostigma only perforates the inner cocoon, and remains hid- 

 den behind the outer cocoon, which forms a sort of curtain, leaving 

 a sufficiently large opening to admit the male ; and the female of 

 0. Ericce, finally, never leaves the pupa-skin, just as is the case with 

 some species of Psgclie. Probably, in order to facilitate the fecunda- 

 tion, the pupa is placed in an inverted position in the cocoon, which 

 is found in the tops of the heath. 



The Record of Zoological Literature, 1866. Volume IIT. Edited by 

 Albekt C. L. G. GtJNTHER, M.A., M.D., Ph.D., F.R.S. &c. Van 



Voorst, 1867. 



In consequence of the illness of one of the Recorders, the volume of 

 ' The Zoological Record ' for the literature of 1866 was published at 

 a later period than usual. " An undertaking of this kind," it is 

 observed in the preface, " must, of necessity, be occasionally exposed 

 to the danger of such a delay without the Editor having it in his 

 power to guard against it." 



Each year that this work comes to us we feel more and more its 

 extreme'usefuluess. Without some such help as that afforded by 

 this volume it is impossible for the zoological student to keep up with 

 the literature of the day. The number of investigators in every branch 

 of natural history is year by year increasing: the works published, 

 in aU languages, multiply in like proportion ; many of them are ex- 

 tremely difficult to procure through a bookseller, and not to be found 

 in our best public libraries ; and periodicals devoted to natural history 

 in general or to some particular class, and Transactions and Proceed- 

 ings recording the investigations of the members of the rapidly in- 

 creasing number of scientific societies, render the attempt of the 

 individual -worker to keep himself acquainted with all that is being 

 written almost hopeless. Here, then, the ' Zoological Record ' comes 



