266 Proceedings of the Royal Physical Society. 



Fig. 7. Isotoma spitzhergenensis, Lubb. Foot. 



Fig. 8. ,, ,, ,, Mucro. 



Fig. 9. Isotoma scJwtH, D. T. Foot. 



Fig. 10. ,, ,, ,, Mucro. 



Fig. 11. Xenylla humicola {0. Fabr.); x 29. Aberdour ; length 2 mm. 



Fig. 12. „ „ „ Foot. 



Fig. 13. ,, ,, „ Dens and mucro. 



Fig. 14. 5, ,, ,, Extremity of abdomen, showing anal 



papillae and spine. 

 Fig. 15. Achorutes longispinus, Tullb., var. scoticus, nov. (side view); x 31. 



Bavelaw ; length 1 '5 mm. 

 Fig. 16. Achorutes longispinm, Tullb., var. scoticus, nov. Extremity of 



abdomen, showing right spine, etc.; x 120. 

 Fig. 17. Achorutes longispiniLS, Tullb., var. scoticics, nov. Foot. 

 Fig. 18. „ ,, ,, ,, ,, Mucro. 



Fig. 19. Achorutes Tufescens {Wic), Extremity of abdomen ; x 120. 

 Fig. 20. „ „ „ Foot. 



Fig. 21. ,, ,, ,, Dens and mucro from above ; X 90. 



Fig. 22. „ ,, ,, Mucro from side. 



Fig. 23. TricBna mirabilis, Tullb. ; x 44. Pentlands ; length 1 mm. 

 Fig. 24. Lipura Jimetaria CNic). Right post-antennal organ and ocelliform 



punctures, as seen in one of our specimens ; x 180. 



XIX. Contributions to the Natural History of the Polar 

 Bear (Ursus maritimus, Linn). By Begin ald Koettlitz, 

 M.E.C.S.Eng., r.RC.P. Communicated by William 

 S. Bruce, F.E.S.G.S. 



(Read 16th November 1898.) 



This paper is supplementary to Messrs Bruce and Eagle 

 Clarke's communication on the " Mammals and Birds of 

 Franz Josef Land," ^ and is based on observations made on 

 over one hundred and twenty bears seen by me during my 

 sojourn in Franz Josef Land with the Jackson-Harms worth 

 Polar Expedition during the years 1894 to 1897. Of these 

 sixty-nine were shot, forty-seven being males, twenty-two 

 females. Cubs were generally captured alive. The following 

 table shows the number seen and taken alive each month 

 and their sex : — 



^ Vide Vol. XiV. pp. 78-112. 



