OLENELLUS AND OTHER GENERA OF MESONACID^ 



Olenelltis — Continued. 



gilberti — Continued. page 



Walcott, in synonymy 320, 321, 324, 325 



White, in synonymy 324 



compared with Callayia ? ncvadciisis 285 



Olenelloides armatus 346, 347 



Olenellus canadensis 318 



Olenellus fremonti 321-322, 329 



Olenellus gilberti, var 331 



Olenellus inter medius 332 



Olenellus lapzvorthi 329, 332 



Olenellus thompsoni 329, 339 



Pcedeumias transitans 310, 329 



eye of compared with that of Limulus 239, 240 



Limulus polypheiiiits 327 



facial sutures not present in 242 



geographic distribution of 252, 329 



hypostoma ^43, 244 



compared with those of Wanneria halli and Olenellus 



fremonti 328 



compared with those of Olenellus fremonti and Pcedeu- 

 mias transitans 322 



in synonymy , 285 



mentioned 248, 300, 314, 317 



segmentation of cephalon 238 



stratigraphic distribution tabulated 251 



gilberti var 331, pi. 40, fig. 8 



compared with Olenellus gilberti and Olenellus canadensis... 331 



stratigraphic distribution tabulated 251 



hoiuelli Meek, in synonymj' 324 



Walcott, in synonymy 320, 324 



White, in synonymy 324 



mentioned 317, 318 



iddingsi Holm, in synonymy 343 



Walcott, in synonymy 343 



intermedins Peach, in synonymy 331 



compared with Olenellus gilberti 2>i^ 



note on specific reference of 2>3^ 



kjeruia Brogger, in synonymy 288 



Holm, in synonymy 289 



Kjerulf, in synonymy 288 



Koken, in synonymy 289 



Linnarsson, in synonymy 288 



Matthew, in synonymy 289 



lapzvorthi Peach 331, pi. 39, figs. 1-7 ; pi. 40, part of fig. 3 



Peach, in synonymy 331 



Peach and Home, in synonymy 331 



compared with Elliptocephala asaphoidcs 332 



Olenellus claytoni 319, 320 



Olenellus fremonti 2,22, Z3>2 



18— w 



