5/6 



NEW YORK STATE MUSEUM 



Leptograptus flaccidus, 33, 34, 38, 42, 44, 

 108, 117, 136, 255, 262, 266, 386. 

 var. macer, 108. 



figure, 108. 

 var. spinifer, 34, 72, 128, 136, 262. 

 unit, trentonensis, 14, 48, 128, 136, 

 262-63. 

 explanation of plate, 517, 

 figures, 263. 

 mut. trifidus, 14, 49, 128, 136, 263- 

 64. 

 figure, 264. 

 mut. trentonensis, 48, 128, 136, 255, 

 261-62. 

 explanation of plate, 516. 

 figures, 261. 

 subtenuis, 253. 

 figures, 261. 

 tenuis, 253, 255. 

 Leptostrophia magnifica, 223. 

 Leroy, 58, 167, 168. 

 Lesquereux, Leo, cited, 140, 220. 

 Levis channel, 21. 

 Licrophycus flabellum, 186, 191. 

 Lindstrom, cited, 186. 

 Linnarsson, cited, 236, 308, 452. 

 Linne, cited, 423. 

 Little Mechin Point, 347. 

 Little Mechin river, Quebec. 20, 350, 370. 

 Llandeilo beds, 29. 

 Lockport, 56, 158, 162, 201. 

 Lockport limestone, 55-57, facing p. 104. 

 Loganograptus, 9, 67, 68, 139, facing p. 65. 



logani, 136. 

 Lomatoceras, 139, 449. 



clintonense, 450. 

 Lonchodomus hastatus. see Ampyx 



(Lonchodomus) hastatus. 

 Long Point, Quebec, 382. 

 Lorraine beds, 45-46, 48, 374, facing p. 9, 



66. 

 Louisville, Ky., 177. 

 Lowville limestone, to, facing p. Q. 



Lycopodium, 189. 

 Lydekker, cited, 229. 



McCoy, cited, 243. 328, 481. 



McDougahs lake, 16. 



Maclurea magna, 12. 



Magdalene river, 20. 



Magog, Canada, 29, 101, 320, ^2j. 



436, 439- 44i> 44C, 481. 

 Magog shale, 29-33, 4& 

 Maine, 21, 49, 50, 52, 54, 279, 382, 



423, 424, 449. 

 Malaise, C, cited, 54, 143, 487. 

 Manistique river, Mich., 158. 

 Manitoulin islands, 437. 

 Mantorville, 41. 

 Maquoketa creek, 372. 

 Maquoketa shale, 39-41, 50. 

 Marr, J. E., cited, 140. 423. 

 Marsouin river, 20, 29. 

 Mason, R. Z., mentioned, 150. 

 Mastigograptus, 69, 127. T32. 147, 

 210-16, 227, 228, facing p. 66. 

 arundinaceus, 33, 48, 127, 132, 

 221-22. 

 explanation of plate, 512. 

 figures, 221. 

 circinalis, 33, 37, 48. 127, 132. 222- 



explanation of plates. 508. 512. 

 gracillimus. 33, 39, 48. 127, 132, 

 219-21. 

 explanation of plate, 508. 

 figures, 220. 

 simplex, 33, t,6, 3S, 48, 127, 132, 

 218-19, 222. 

 explanation of plates, 506, 512. 

 figure. 219. 

 tenuiramosus, 33, 36, 38. 39. 48. 



T48. 2TT. 2TJ, 214, 2l6-l8, 210. 

 222, 22s. 



explanation of plates, 506, 508. 

 512. 



figure, 217. 



430, 



406, 



206, 



21.1, 



23- 



2l8, 



214. 



127, 



22T 

 5 TO. 



