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MR JAMES MURRAY ON 



ing table, where the records are set out in parallel columns, it appears that Shetland 

 was more productive, giving 18 species against 10 from Orkney. Only 6 species 

 were common to the two groups, leaving 12 peculiar to Shetland and 4 to Orkney. 



Six species and one variety are as yet unknown on the Mainland of Scotland : 5 of 

 these were in Shetland only (all from Ronas Hill), 1 in Orkney only, and 1 was common 

 to Orkney and Shetland. 



List of Species in Orkney and Shetland. 





Orkney. 



Shetland. 



Echiniscus arctomys, Ehr. 



Rousay. 



Ronas. 



E. mutabilis, Murray 







Hoy 



Saxavord. 



E. islandicus, Richters 









Ronas. 



E. gladiator, Murray (var.) 









Ronas. 



E. granulatus, Doy. . 









Mainland. 



E. quadrispinosus, Richters, var 









Ronas. 



Milnesium tardigradum, Doy. 







Pomona. 



Mainland. 



Macrobiotus oberkauseri, Doy. 







Pomona. 





M. zetlandicus, Murray 









Ronas. 



M. tubercidatus, Plate 









Mainland. 



M. sattleri, Richters . 







Pomona. 





M. hufelandi, C. Sch. 







Hoy 



Ronas. 



M. orcadensis, Murray 







Hoy 





M. coronifer, Richters 









Mainland. 



M. erenulatus, Richters 







Pomona. 



Ronas. 



M. harmsworthi, Murray . 









Ronas. 



M. echinogenitus, Richters 







Pomona. 



Mainland. 



M. dispar, Murray . 









Ronas. 



M. ambiguus, Murray 









Ronas. 



M. dubius, Murray . 









Ronas. 



Diphascon chilenense, Plate 







Pomona. 





D. angustatum, Murray 









Mainland. 



Scottish Alpine Tardigrada (8). 



The term Alpine is here used simply to denote species which have been found at a 

 considerable elevation. It is not intended to have the restricted application which may 

 have a use in botanical studies. The Tardigrada of the hills are separately considered, 

 because there is reason to believe that the more rigorous climate of the mountain tops 

 is favourable to the existence of certain arctic species, and because one or two species 

 have only been found on the hill tops. The data for the study of our mountain Tardi- 

 grada are sufficiently meagre, — Ben Lawers has been visited twice, with encouraging 

 results ; collections from Ben Ledi, Meall nan Ptarmagan, and some other Perthshire 

 hills have been sent to me by Mr Wm. Evans ; and lastly, the highest hills in Orkney 

 and Shetland have been visited. 



Those northern peaks, Ward Hill, in Hoy, and Ronas Hill, in Shetland, though 



