VI. 



I 



Supposed Fossil Lampreys. 



SOME months ago, in dealing with our knowledge of the " Fore- 

 runners of the Backboned Animals,"' reference was made to a 

 singular little organism, Palcsospondylus gunni, which seemed to indicate 

 the existence in the early Devonian period of a highly-organised 

 member of the group to which the modern lampreys and hag-fishes 

 belong. This fossil, it will be remembered, was discovered by Dr. 



Restoration of Palaospondylns gunni, some- 

 what enlarged, by Dr. R. H. Traquair. c. cirri ; 

 t.p. anterior part of cranium ; p.a. posterior 

 part of cranium ; x. paired plate-like structure 

 behind the head. 



Marcus Gunn in the Lower Old Red Sandstone of Caithness, and 

 our notice was based partly upon the brief original description by Dr. 

 R. H. Traquair, partly upon some specimens obtained by Mr. Donald 

 Calder, of Thurso. We are now glad to announce that, within the 

 last month, Dr. Traquair^ has published a fuller and more accurate 

 description of the organism, based upon new specimens ; and the 



1 Natural Science, vol. i., pp. 596-602 (1892). 



2 R. H. Traquair, " A Further Description of Palaospondylus ^««;n', Traquair," 

 Proc. Roy. Phys. Soc. Edinb., vol. xii., 1892-93, pp. 87-94, pi. i. 



