DALY. — ETCH-FIGURES ON AMPHIBOLES. 379 



enough confidence in the generalization from certain types to all types. 

 The systematic investigation was almost entirely pursued in the labora- 

 tory of Professor Lacroix, and I desire to acknowledge, in particular, 

 his generosity in placing at my disposal the apparatus necessary for 

 the etching. 



The list of specimens is self-explanatory. For convenience I have 

 followed Dana's classification closely, without however implying an 

 absolute adherence to all its details. I have inserted the catalogue num- 

 bers of the Museum specimens, sometimes the date of collection, and, 

 where possible, leading references to original papers in connection with 

 those specimens that have furnished particular descriptions or material 

 practically identical with them. An asterisk denotes a specimen "pre- 

 sumably similar to the classic material from the same locality. The 

 source of each specimen is indicated in the general list by letters pre- 

 fixed to the number corresponding. H. — Heidelberg, V. = Vienna, 

 P. = Paris, C. = Copenhagen, M. — Madison, L. = Lille. 



Amphiboles proper. 



A. Orthorhombic amphiboles. 

 a Anthophyllite. 



P. 1. Kongsberg, Norway : — 



Des Cloiseaux, Nouv. Recherch., 1867, p. 541. 



Michel Levy and Lacroix, Min. des Roches, 1888, p. 149. 

 P. 2. Nunangiast, Greenland. —20-125. 

 P. 3. Regardsheina, Norway. 

 b. Gedrite. 



P. 4. Gedres, France : — 



Dufre'noy, Ann. des Mines, 1836, Vol. X. p. 582, etc. 



B. Monoclinic Amphiboles. 

 a. Non-aluminous. 



(1) Tremolite. 



H. 6. St. Gothard (?). 



P. 6. Siberia. — " Grammatite." — 2-855. 



P. 7. Faroe Islands. — 64-63. 



V. 8. Newport, Bucks Co., Mass. (?) A. c. 4154. 



*M. 9. Gouverneur, N. Y. 



(2) Actinollte (witii certain allies). 

 *H. 10. Zillerthal. 



*P. 11. 



P. 12. Syra. 



P. 13. Gellivara, Asia Minor, 68-31. 



V. 14. Killaersarbik, Greenland. A. e. 924, 1818. 



V. 15. Anaitsirksarvik, Greenland. A. u. 98. 

 *V. 16. Orange Co., N. Y. E. 5606, 1888. 



V. 17. Arendal, Norway. A. e. 961, 1825. 



