ILLUSTRATIONS. 



Page. 

 it' Tertiary lakr l.asin at Florissant. Colorado.. .......................... Frontispiece. 



I. Insects from bone caves and niN-ru-la. ial .lay* .............. <>i>7 



II, III. luM.'i'i-, f ..... i tin' 'lYmai > deposits of British Colombia ...... 669-672 



IV. Ins.'.'t^ Ir.irn iiiic.-llaiiriMi> I Vitiai\ ilr|iii.sits, nifliuliiii; "Hn- spc.ii's'froui th(< l.ar- 



i ill.' IVrti.iM ili-|insits <>t' Cri fii Kivn. \V\ niiiiii^. . 675-C80 

 XI. Avar I in ul. i frniii I In- Ti-rtiary ilr]uisits nf I'loi i,s ml . ( '.iliirado .................... 687 



Ml XV. NYun>|'li'i.-i IV ..... tlir T. i I i.u\ ilr|n.~its .>!' I'lnrissaiit ........................ &J9-696 



\\ I. \\II. i )|-ilin|.ti'!.i I r. mi tin' Ti-rtiary drpioits nf I-'lm is.sant . . ...... 697-700 



\\'11I XX VII I. II' MI 1 1 iii !. i I'l'Min i l,i- TiTliary d.-i).sits of l-'lnnssaiit ................. 701-722 



1-3. 1'lauoccpbalas uaelloidoB ....................................................... <J 5 



9 



