INDEX 461 



Menocephalus — Continued. page 

 adrastia Walcott (zzzLevisia adrastia (Walcott)), former and pres- 

 ent generic reference 71 



belenus Walcott {= Lisania bcleniis (Walcott)), former and pres- 

 ent generic reference 71 



sp. Walcott (=Ano)nocare sp. (Walcott)), former and present 



generic reference 71 



Merostomata (Dana) Woodward, subclass named 20, 21, 199 



Beltina danai referred to 21 



Bidentia diificilis nearer to, than to Branchiopoda 174 



classification of 20, 155 



descent of 160-161 



foreshadowed by Burgess shale fauna 165 



line of descent 164 



Middle Cambrian 17 



origin of 165 



relations of, to Branchiopoda, Leptostraca, Merostomata, and 



Trilobita 163 



representatives of 155 



segmentation, table of 158 



mentioned 148, 153, 155 



table of comparison 20 



Merostomes, beautifully preserved new specimens of 18 



discussion of American Cambrian 19 



fauna of the Silurian, connection with pre-Cam])rian Algonkian 



crustacean 19 



named and characterized 158 



referred to Amiella 19 



Merriam., J. C, bibliographic references 15 



Mesonacidse, resemblance of Callavia eucharis to 315 



suggested by Olenopsis americanns 243 



Olenopsis roddyi 245 



Metastoma or labium 158 



Metoptoma cornutaforme Walcott (= Triblidiuni), synonymic reference. . 263 



listed from Hoyt quarry fauna 252 



from " Saratogian," Hoyt quarry 253 



simplex, listed from " Saratogian," Hoyt quarry 253 



sp., listed with St. Lawrence fauna 356 



Mickwitsia, from Robson Peak district 309 



occidens Walcott, compared with Mickwitsia muralensis 311 



inonilifera Linnarsson, compared with Mickzdtsia nmra! crisis . .^lo, 311 



muralensis Walcott, new species described 310 



figured, pi. 50, figs. 10, 11 318 



pi. 51, figs. 1-6 320 



pi. 52, fig. 1 322 



compared with Mickwitsia monilifera Linnarsson 310 



Mickwitsia occidens 311 



Microdiscidse Koken *, MoUisonia and Toiitoia referred to 195 



* Koken was spelled " Coquin " by error in preparing this paper. 

 4 



