576 Obituary — Frederick Justen, F.L.S. 



On the other hand, Cidaris BowerhanTci is a characteristic and 

 easily recognisable fossil in the Chalk above the zone of A. varians 

 as understood by me. It has only been recorded in the lower zone 

 near Lewes, and does not occur in the ' Totternhoe Stone.' As an 

 index, it seems much more suitable and definite than any of those 

 species suggested by Mr. Jukes-Browne. 



I still maintain, however, that it is more practicable to use the 

 " Two Holasters," which are commoner fossils ; and it does not 

 seem unreasonable to use in partnership two contemporary species 

 of different habitat to indicate beds deposited under variable con- 

 ditions at the same time. Mr. Jukes-Browne has shown at some 

 length that my brief summary of the occurrences of Holaster sub- 

 globosus contains some inaccuracies. This I am willing to admit ; 

 but the necessary corrections do not affect the main conclusion — that 

 it requires the two Holasters to define the whole zone, 



T. 0. BOSWORTH. 



St. John's College, 



Cambridge. 



FREDERICK JUSTEN, F.L.S. 



Born February 29, 1832. Died November, 20, 1906. 



It is with deep regret that we record the death, on Tuesday, 

 20th November, of our dear and valued friend, Mr. Frederick Justen, 

 F.L.S., the publisher of this journal. 



Mr. Justen was born at Bonn on the 29th February, 1832, and 

 came to England as a German Assistant to the firm of Messrs. 

 Dulau & Co., 37, Soho Square, W-, in 1851. 



Upon the decease of the late Mr. Twentyman, the then acting 

 partner, Mr. Justen became the sole proprietor of the firm, and for 

 many years devoted his energies to supplying the requirements of 

 the British Museum and the Libraries of the various scientific 

 societies of London and the provinces with foreign publications. 



It was his strong sympathy with the aims and objects of 

 the Geological and Palaeontographical Societies, the Geologists' 

 Association, and other kindred institutions, that prompted him, 

 in 1895 — irrespective of any pecuniary considerations whatever — 

 to undertake the publication of the Geological Magazine, in the 

 success of which he always took the deepest interest. 



It is not too much to affirm that the onward progress of the 

 Geological Magazine in the last 12 years has been mainly due 

 to the public-spirited support given to it by Mr. Frederick Justen, 

 and no one of all our friends and supporters rejoiced more than he 

 did, when, in February last, the 500th monthly number of this 

 journal was issued from 37, Soho Square. 



Notwithstanding the great personal loss which the death of 

 Mr. Justen has caused to us, we are happy to state that the business 

 relations with the firm of Messrs. Dulau and Company will be 

 continued in the same cordial manner as heretofore. H. W. 



