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Bashford Dean Memorial Volume 



With a few scattering exceptions, we have been able to ascertain the lengths of the 

 fish studied by the scientific men listed in our bibliography, also the lengths of those fish 

 found in a large number of the museums of Europe and the United States. In our tables 

 only 8 specimens have to be listed under "sex unknown," while definite data are given for 

 15 males and 35 females. Little need be said of the first class. Their siz,es run from 950 to 

 1600 mm. (two specimens) or from 37.4 to 63 inches. Barring No. 1, which is only 950 

 mm. long, these fishes are of fair sizie (1300 to 1600 mm.). Five are from Japan, two from 

 Morocco, and one from the Bay of Biscay. 



TABLE IV 

 LENGTHS OF MALE SPECIMENS OF CHLAMTDOSELACHUS 



The 15 males run from 920 to 1650 mm., 36.25 to 65 inches. The average is 1293 mm. 

 or 50.9 inches. Omitting No. 1, the smallest fish, the average becomes 1320 mm. or 52 

 inches. Of the 15 fish listed, 12 are definitely from Japan, and 8 of these were taken for 

 Dean and their measurements are listed in his notes. These measurements were presum' 

 ably made from freshly caught fish, and are probably accurate; some if not all of them 

 were certainly made by Dean himself. 



For female fish we present the surprising number of 35 measurements. Of these 

 fish 32 are from Japan and 21 measurements are from Dean's specimens. These latter 

 measurements were all made from newly caught fish and are certainly accurate.' Here 

 again the table begins with (in this case two) specimens far below the usual size, and the 



' What has become of all this valuable material is unknown. Dean undoubtedly brought a number of these fish back to America 

 with him, or had later catches sent. This is the probable source of our three adult specimens and of the head at Columbia. Dean was 

 for many years the source for Chlamydoselachus material in America and Europe. Thus Allis (1893, p. 123) says he obtained "several 

 heads" from Dean for his work. This in part will account for the disappearance of some of these specimens. But one should remember 

 that Dean was primarily interested in obtaining embryos. Perhaps some male specimens were ignored, and some female specimens 

 discarded after they had been examined for embryos. 



