5 Arachn. 
Systematic. — Trilobita. 
2831 
DISTRIBUTION = 2827. 
(Geological.) 
Cambrian. 
Trilobita spp. n. ; Walcott, 12. 
Shropshire, Trilobita spp. n. ; Cob- 
bold, 1. 
Ordovician. 
Dufton Shales, Melmerby, Trilobita 
spp. n. ; Reed, 9. 
Chazy, Ottawa, Trilobita spp. n. ; 
Raymond, 8. 
Devonian. 
Elberfeld, Trilobita ; Schmidt, 10. 
Eifel, Trilobita sp. n. ; Woodward, 
13. 
Moravia, Trilobita spp. n. ; Smydka, 
11 . 
Unterdevon, Deutschland, Trilo- 
bita var. n. ; Dohm, 2. 
Carboniferous. 
New Mexico, Trilobita sp. n. ; Girty, 
3. 
Unt. Kohlenkalk von Chabarny, 
Trilobita; Janisevskij, 5. 
III.— SYSTEMATIC INDEX = 2831. 
t TRILOBITA. 
Acidaspis semievoluta sp. n. Dufton 
Shales, Melmerby, Reed Geol. Mag. 
Dec. V 7 p. 214 figs. 
Agraulos ( Slrenuella ) salopicnsis sp. 
n. Cambrian, Shropshire, Cobbold 
London Q. J. Geol. Soc. 66 p. 31 figs. 
Anisopyge inornata sp. n. New 
Mexico, Carboniferous, Girty Wash- 
ington Bull. U. S. Geol. Surv. No. 389 
1909 p. 118 fig. 
Anomocare platycephalum ' p. 36 
figs., parvum p. 39 figs., pustulatum p. 
40 figs., spp. n. Cambrian, Shropshire, 
Cobbold London Q. J. Geol. Soc. 66. 
Bathyurus superbus sp. n. Chazy, 
Ottawa, Raymond Ottawa Nat. 24 
p. 129 figs. 
Brachymetopus uralicus Subcarbon 
von Chabarny, Janisevskij Tomsk 
Izv. technol. Inst. 17 1 p. 1G8 figs. 
Bronleus Halli sp. n. Devonian, 
Eifel, Woodward Geol. Mag. Dec. V. 
7 p. 408 figs. 
Callavia synonymy etc., p. 274, 
bicensis sp. n. Canada, Cambrian, p. 277 
figs., brdggeri p. 279 figs, burri sp. n. 
Massachusetts, Cambrian, p. 280, 
callavei p. 282 figs., cartlandi Raw 
sp. n. England, Cambrian, p. 282 figs., 
cro byi sp. n. Massachusetts, Cambrian, 
p. 284 figs., nevadensis sp. n. Nevada, 
Cambrian, p. 285 figs., Walcott 
Washington Smithsonian Inst. Misc. 
Collect. 53. 
Dechenella Burmeisteri, Devon, Elber- 
feld, Schmidt Elberfeld Jahresber. 
natw. Yer. 12 p. 56 fig. 
Elliptocephala synonymy etc. p. 267, 
asaphoides p. 269 figs., Walcott Wash- 
ington Smithsonian Inst. Mise. Collect. 
53. y 
Griflithides globiceps p. 167 figs., 
G. cf. seminiferus p. 168 figs., Subcarbon 
von Chabarny, Janisevskij Tomsk 
Izv. technol. Inst. 17 1. 
Holmia synonymy etc. p. 286, kjerulfi 
p. 288 fig., lundgreni p. 290 figs., rowei 
sp. n. Nevada, Cambrian p. 292 figs., 
Walcott Washington Smithsonian 
Inst. Misc. Collect. 53. 
Hatnalonolus armalus var. n., west- 
rami Deutschl. Devon., Dohm Bonn 
Verh. nathist. Ver. 66 p. 156 fig. — H. 
ascriptus sp. n. Dufton Shales, Mel- 
merby, Reed Geol. Mag. Dec. V T 
p. 216 figs. 
Isotelus arenicola sp. n. Chazy, 
Ottawa, Raymond Ottawa Nat. 24, 
p. 130 figs. 
M esonacidae ; descr. p. 236, develop- 
ment p. 236, genera p. 246, phylogeny 
p. 249, strat. and geogr. distr. p. 250, 
list of genera and spp. pp 251, 351, 
bibliography p. 372, Walcott Washing- 
ton Smithsonian Inst. Misc. Collect. 53.. 
Mesonacis synonymy p. 261, mick- 
ivitzi p. 262 figs., lorelli p. 264 figs., 
vermonlana p. 264 figs., Walcott t.c. 
Micmacca (?) ellipsocephaloides sp. n. 
p. 27 figs., var. n. spinosa p. 28 fig. , var. 
n. strenuelloides p. 29 figs., var. n. 
senior p. 29 fig., parvula sp. n. p. 30 figs., 
Cambrian, Shropshire, Cobbold London 
Q. J. Geol. Soc. 66. 
