8 Arachn. 
XI. Arachnida — Gigantostraca. 
[ 1010 ] 
nata p. 463 figs., Nicholas Q. J. Geol. 
Soc. 71. 
Trinucleus struct, and affinities p.118, 
Reed Geol. Mag. 3. 
Tainania cleora p. 227, elongata sp. n. 
Upper Cambrian, Canada p. 228 figs., 
Walcott Smithsonian Miso. Collect. 84. 
V anuxemella gen.n. ( Oryctocephalidae ) 
p. 220, contracta p. 221, nortia p. 222, 
spp. n. Lower Cambrian, N. America, 
figs., Walcott Smithsonian Misc. 
Collect. 64. 
Wanneria walcotlana p. 219 figs., 
Walcott Smithsonian Miso. Collect. 64. 
XIPHOSURA, etc. 
Alsbero, 1. — Bradley, 2. — Mattill 
and Mattill, 9. — tP ARKER 11. 
fEURYPTERIDA. 
Eurypterus pumilus sp. n. Silurian, 
Illinois, p. 322 fig., Savage Bull. Geol. 
Soc. Amer. 27. 
Eusarcus trigonus sp. n. Silurian, New 
York St., p. Ill fig., Ruedemann 
Albany Bull. New York St. Mus. 189. 
Pseudoniscus clarkei sp. n. Pittsford, 
New York St., p. 107 figs., Ruedemann 
t.c. 
