572 



Thalaesema, 55. 



Thalictrum, N. A., species of, 293. 



Thalictrum alpinum, 299. 



anemonoides, 293. 

 clavatum, 29S. 

 debile, 302. 

 dioicum, 302. 

 fendleri, 303. 

 galeottii, 304. 

 gibbosum, 304. 

 hernandezii, 304. 

 lanatum, 304. 

 minus, 300. 

 occidentale, 303. 

 peltatum, 304. 

 polycarpum, 304. 

 polygamum, 301. 

 pubigerum, 304. 

 purpurascens, 300. 

 sparsiflorum, 299. 

 venulosum, 302. 

 Thayek, Mrs. Nathaniel. Gift of a bust 



of Louis Agassiz, 305. 

 Thecla betuli, 358. 

 ilicis, 357. 

 quercus, 357. 

 roboris. 357. 

 rubi, 357. 

 spini, 357. 

 strigosa, 357. 

 Thestor ballus, 357. 

 Thryothorus fasciato-ventris, 387. 

 maculipectus, 380. 

 rufalbus, 386. 

 ruficeps, 387. 

 Tkelease, W. N. A. species of Thalic- 

 trum, 293. 

 Triassic monoclinal in the Connecticut 



valley, origin of. 339. 

 Trichiulus, 306. 

 Trichoplax adhserens, 150. 

 Trilobites, 317. 



Trochoceras desplainense, 486. 

 Troglodytes tecellata, 388. 

 Troglodytida\ type-specimens of, 383. 

 Tubifex. 6J. 



Tubularia, 151. 



mesembryanthema, 117. 

 Tuttle, Albert H., award to, of Walker 

 Prijze for 1884, 195. 



Unio, 535. 



Upham, Warren. The recession of the 

 ice-sheet in Minnesota in its relation 

 to the gravel deposits overlying the 

 quartz implements found at Little 

 Falls, 436. 



Velella, 394. 

 Volvox, 397. 



globator, 50. 

 Vorticella, 48. 



Wadsworth, M. E. The relation of the 

 Keweenawan series to the eastern 

 sandstone in the vicinity of Torch 

 Lake, Mich., 172; a supposed fossil 

 from the copper-bearing rocks of 

 Lake Superior, 208; theories of ore 

 deposits, 197. See also Dickerman, 

 Q. E. and Wadsworth, M. E. 



Walker prize, grand, awarded to James 

 Hall, 194. 



Walker prizes for 1884, awarded to A. H. 

 Tuttle, 195; for 1886, awarded to D. 

 H.Campbell, 321. 



Waterston, R. C. Gift of $200, 378. 



Wells, Samuel. A notice of the life of 

 the late Richard C. Greenleaf, 529. 



Wright, G. F. On the age of the Ohio 

 gravel-beds, 427. 



Zoological garden in Boston, report of the 



committee on, 523. 

 Zoology, 45, 163, 164, 214, 305, 338, 342, 358, 



380, 383, 389, 396, 461, 466, 518, 531; 



use of polynomials as names in, 



164. 

 Zootliamnium, 136. 



