7 Araclin. 
Systematic.— Tuilobita — Eurytterida. 
2831 
Jsolclus bcnjamini, covingtonensis, 
spp. n. Ordovician Kentucky, Ulrich in 
Foerste Cincinnati J. Soc. Nat. Hist. 
21 p. 144 figs. — /. gigas , maximus, devel., 
Raymond Bull. Mus. Comp. Zool. 
Harvard 58 p. 245 figs. — I. iowensis, 
Slocum Chicago Field Columb. Mus. 
Pub. Geol. Scr. 4 p. 48 figs. — /. 
longaevus sp. n. Illinois and Missouri 
Silurian, Savage Illinois Geol. Surv. 
Bull. No. 23 p. 103 figs. 
Lidias ( Corydocephalus ) maccullodii 
p. 28, ( Amphilichas ) ardmillanensis p. 29, 
spp. n., hibernicus p. 30, figs., Ordovi- 
cian, Girvan, Reed Palaeont. Soc. 67. 
Mcgalaspis beckeri sp. n. Ordovician 
Iowa, Slocum Chicago Field Columb. 
Mus. Pub. Geol. Ser. 4 p. 50 figs. — M. 
minor , Weller Carnegie Inst. Research 
in China 3 p. 288 fig. 
Nileus vigilans, Slocum Chicago 
Field Columb. Mus. Pub. Geol. Ser. 4 
p. 52 figs. 
Osceolia gen. n. type Dikelocephalus 
osceola, Walcott Smithsonian Inst. 
Mi sc. Collect. 57 p. 385. 
Paradoxides harlani ontogeny p. 225, 
haywardi sp. n. Massachusetts Cambrian 
p. 237, figs., Raymond Bull. Mus. 
Comp. Zool. Harvard 58. 
Pennaia africana sp. n. Devonian, 
S. Africa, Shand Trans. Geol. Soc. S. 
Afr. 17 p. 28 figs. 
Phacops ( Pterygometopus ) retardatus 
p. 49, liunteri p. 52, ( Dalmanitina ?) 
asteroideus p. 53, spp. n., ( Cliasmops ) 
bisseli p. 48, Ordovician, Girvan, figs., 
Reed Palaeont. Soc. 67. 
Phillipsia eidiwaldi var. mucronata, 
Corr Dundee Proc. Nat. Soc. 1 p. 73. 
Proetns chambliensis sp. n. Ordovician 
Quebec, Foerste Bull. Sci. Lab. 
Denison Univ. 17 1914 p. 320 figs. — 
P. conicus sp. n. Michigan, Devonian, 
Grabau In : Sherzer, Michigan Geol. 
Biol. Surv. Pub. No. 12 p. 301. — P. 
princeps sp. n. Illinois and Missouri, 
Silurian, Savage Illinois Geol. Surv. 
Bull. No. 23 p. 57 figs. 
Pterygometopus fredericki p. 79, 
larrabeei p. 81, spp. n. Ordovician Iowa, 
figs., Slocum Chicago Field Columb. 
Mus. Pub. Geol. Ser. 4. 
Remopleurides nicholsoni sp. n. p. 12, 
correctus p. 15, Ordovician, Girvan, figs., 
Reed Palaeont. Soc. 67. 
Saukia gen. n. type Dikelocephalus 
lodensis p. 373, color adoensis Colorado 
p. 370, fallax Texas p. 378, leucosia 
Wisconsin, Minnesota p. 379, pyrene 
Wisconsin p. 382, junia p. 378, rustica 
p. 383, Oklahoma, wardi Virginia p. 394, 
stosei Pennsylvania p. 384, figs., 
spp. n. Cambrian, Walcott Smith- 
sonian Inst. Misc. Collect. 57. 
Sphaerexochus mirus var. n. bal- 
claichiensis Ordovician Girvan, Reed 
Palaeont. Soc. 67 p. 47 fig. 
Sphaerocoryphc maquoketensis sp. n. 
Ordovician Iowa, Slocum Chicago 
Field Columb. Mus. Pub. Geol. Ser. 4 
p. 77 figs. 
Staurocephalus globiceps , Reed 
Palaeont. Soc. 67 p. 48 fig. 
Stygina latifrons, Reed t.c. p. 18 fig. 
Telephus salteri sp. n. Ordovician, 
Girvan, Reed t.c. p. 16 fig. 
Thaleops ovata, Slocum Chicago 
Field Columb. Mus. Pub. Geol. Ser. 4 
p. 56 figs. 
Triarlhrus bedci var. n. macastyensis 
Ordovician Canada, Twenhofel Ottawa 
Geol. Surv. Can. Mus. Bull. 3 p. 35. 
Trinucleus spp. notes, Reed Geol. 
Mag. 1 p. 349 figs. — T. albidus sp. n. 
Ordovician, Girvan, Reed Palaeont. 
Soc. 67 p. 3 figs. 
Tsinania gen. n. type Illaenurus 
canens, Walcott Smithsonian Inst. 
Misc. Collect. 64 p. 43. 
XIP1IOSURA, Etc. 
Cotronei, 6. — Demoll, 7. 
f Limulites Bronni, Bill Strassburg 
Mitt. geol. Landesanst. 8 p. 327 fig. 
tEURYPTERIDA. 
Eurypterus ( Anthraconect.es ) nebras- 
Jcensis sp. n. Carboniferous Nebraska, 
Barbour Amer. J. Sci. 58 p. 509 figs. 
