144 NATURAL SCIENCE. Feb.. 1896. 



only the later stages of maturation, is consistent with either Brauer's or Riickert's 

 view, and I did not wish to complicate the subject by the introduction of theoretical 

 considerations relating to bivalent chromosomes, reducing divisions, and the like. 

 Columbia College, Edmund B. Wilson. 



Decembey 9, 1895. ~^ 



" The Glacialists' Magazine." 



In the January number of Natural Science references are made to this 

 magazine and myself, upon which I would make the following remarks. 



Overwork and ill-health at the close of 1894 ^.nd beginning of 1895 brought my 

 work on the magazine into arrear, and when my health broke down completely, last 

 March, a committee was appointed to relieve me of every task that could be deputed. 

 Unfortunately, that committee made a grievous mistake in regard to the distribution 

 of the magazine, and it was not until my return home, after an absence of more than 

 three months, that I learned that, though copies had been sent to the members of 

 the Glacialists' Association in June or early in July, up to and including the first 

 part of vol. iii., none was sent to the publisher.' This defect was immediately 

 rectified, and the September part was also sent, which seems to have in some way 

 escaped your notice. [Not at all ; see p. 62. — Ed., Nat. Sci.] 



The Glacialists' Magazine is now published quarterly at Lady-day, Mid- 

 summer, Michaelmas, and Christmas. The Christmas number was issued on 

 December 31. 



Chapel Allerton, Percy F. Kendall. 



January 13, 1896. 



[We have already announced the change in period of publication of this 

 valuable magazine, and we sincerely hope that the easier labours of a quarterly may 

 spare Mr. Kendall's health ; but should the influence of erratics again prove too 

 much, it would not take him half an hour to stamp an issue of his magazine with 

 its correct date of publication. — Ed., Nat. Sci.] 



North Sea Fisheries. 

 In our review of Mr. Holt's " Examination of the Present State of the Grimsby 

 Trawl Fishery " (vol. viii., p. 52), we correctly quoted the price as 3s. 6d. We are, 

 however, glad to learn from the Director of the Marine Biological Laboratory at 

 Plymouth that reprints of this paper can now be had at is. each, either from Messrs. 

 Dulau & Co. or from himself. 



A Card Catalogue to Zoological Literature. 

 Dr. H. H. Field writes to us that this scheme is now in full operation, and 

 states that " after February 15, the number of copies printed will be reduced so as 

 to be but slightly in excess of the subscription list. Persons ordering much after 

 that date run the risk of finding a part of the catalogue already out of print." 

 Further information may be obtained from the Bibliographical Bureau, Universitats- 

 str. 8, Zurich-Oberstrass, Switzerland. 



NOTICE. 



To Contributors, — All communications to he addressed to the Editor 

 of Natural Science, at 22, St. Andrew Street, Holborn Circus, 

 London, E.C. Correspondence and notes intended for any particular month 

 should be sent in not later than the loth of the preceding month. 



To THE Trade. — Natural Science is published on the 2^th of each 

 month ; all advertisements should be in the Publishers' hands not later than the 

 20th. 



The " Challenger " Number. — In reply to enquiries, we remind our 

 readers that, although the First edition of this ran out of print immediately, 

 there are still some copies of the Second edition to be obtained at the usual price — 

 One Shilling. No more will now be printed, so orders should he sent at once. 



