6 Araclin. 
[1910] 
XI. Arachnida.- 
Microdiscus comity crisis sp. n. Cam- 
brian, Shropshire p. 21 figs., lobatus p. 
22 figs., helena p. 23 figs., Cobbold t.c. 
Mohicana gen. n. near Micmacca p. 
44, lata p. 45 fig., clavata p. 46 figs., 
spp. n. Cambrian, Shropshire, Cobbold 
t.c, 
Nevadia gen. n. p. 256, weeksi sp. n. 
Nevada Cambrian p. 257 figs., Walcott 
Washington Smithsonian Inst. Misc. 
Collect. 53. 
Olenelloides synonymy etc. p. 345, 
armatus p. 347 figs., Walcott t.c. 
Olenellus synonymy etc. p. 311, 
argentus Nevada, Cambrian, p. 314 figs., 
canadensis British Columbia and Al- 
berta, Cambrian, p. 316 figs., claytoni 
Nevada, Cambrian p. 319 figs., fremonti 
Nevada and California, Cambrian, 
p. 320 figs., spp. n gigas p. 323 fig. 
gilberti p. 324 figs., lapworthi p. 331 
figs., logani sp. n. Labrador, Cambrian, 
p. 333 figs., reticulatus p. 335 figs., 
thompsoni p. 336 figs., 1. var. n. crassi- 
marginatus Vermont and Pennsylvania, 
Cambrian, p. 340 figs., walcotti p. 341 
figs., Walcott t.o. 
Paedeumias gen. n. p. 304, transitans 
sp. n. eastern N. A., Cambrian, p. 305 
figs., Walcott t.c. 
Peachella gen. n. p. 342, iddingsi p. 
343 figs., Walcott t.c. 
-Gigantostraca. 
Phillipsia derby ensis Subcarbon von 
Chabarny, JaniSevskit Tomsk Izv. 
technol. Inst. 17 1 p. 166 fig. 
Proetus ielechovicensis p. 75, moravicus 
p. 76, spp. n., figs., Devonian, Moravia, 
Smycka Prag. Bull. Ac. Sci. Fran?. 
Jos. 2 1895. 
Protolenus latouchei p. 42 figs., 
morpheus p. 44 fig., spp. n., Cambrian, 
Shropshire, Cobbold London Q. J. 
Geol. Soc. 66. 
Ptychoparia (?) attlebor ensis p. 23 
figs., annio sp. n. Cambrian, Shropshire 
p. 24 figs., Cobbold t.c. 
Trinucleus Nicholsoni sp. n. Dufton 
Shales, Molmcrby, Heed Geol. Mag. 
Dec. V. 7 p. 212 figs. 
Wanneria gen. n. p. 296, gracile sp. n. 
Nevada, California and Canada, Cam- 
brian, p. 298 figs., halli sp. n. Alabama, 
Cambrian, p. 301 figs., walcottanus 
p. 302 figs., Walcott Washington 
Smithsonian Inst. Misc. Collect. 53. 
XIPHOSURA. 
(Vacant.) 
EURYPTERIDA. 
(Vacant.) 
