26 Arachn. 
ARAOHNIDA. 
are figured and described in full, with complete synonymy. The genera 
of Trilobites are characterised, with figures of typical species, pp. xxi- 
xlix ; the genus Protolimulus , on p. xlviii ; and Styloneurus ( Eurypterida ), 
on p. li. The following species of Trilobites described as new : — 
Brontem tullius , p. 12. 
Phacops cristata n. var. pipa, p. 18. 
Dalmanites ( Hausmannia, n. subg., p. 28), phacoptyx, p. 31 ; Coronura, 
n. subg., p. 33 ; comis , p. 41 ; barrisi, p. 48 ; Corycephalus , n. subg., p. 55; 
pygmceus, p. 56 ; anchiops n. var. sobrinus , p. 62. 
Acidaspis callicera , p. 69, romingeri, p. 71. 
Lichas hispidus , p. 77 ; hylceus , p. 81; contusus , p. 83; ( Ceratolichas , 
n. subg.) gryps, p. 84 ; dracon , p. 85. 
Dicranogmus ptyonui'us , p. 86. 
Pruetus curvimarginatus , p. 94 ; latimarginatus , p. 97 ; folliceps, p. 101 ; 
microgemma t p. 109 ; stenopyge, ovi/rons, p. 110 ; delphinulus, p. Ill ; 
tumidus, p. 113 ; jejunus , p. 124 ; nevadce , p. 129. 
Phaethonides arenicolus , p. 134 ; varicella , p. 135 ; gemmceus, p. 136 ; 
cyclurus , p. 137. 
Cyphaspis stephanophora } p. 142 ; diadema , hybrida, p. 144 ; craspedota , 
p. 148 ; ccelebs, p. 151. 
Herrick, C. L. The Geology of Licking County, Ohio. Pt. iv. The 
Subcarboniferous and Waverloy Groups. Bull. Denison Univ. iii, 
pp. 13-110. 
Phillipsia meramecensh (Shum.), p. 28, pi. xi, fig. 3 ; shumardi (Herr.), 
p. 29, pi. ii, fig. 22; precursor , n. sp., p. 29, pi. xii, fig. 1. 
Matthew, G. F. On Psammichnites and the early Trilobites of the 
Cambrian Rocks in Eastern Canada. Am. Geol. ii, pp. 1-9. 
Mitchell, J. On a new Trilobite from Bowning. P. Linn. Soc. 
N.S.W. iii, pp. 397-399 [pi. xvi, figs. 7-12, of vol. ii]. 
Acidaspis longispinis , n. sp., from the middle and upper Trilobite beds 
of Bowniug. 
Remel^, A. Richtigstellung einer auf die Phacopiden-Species Homalops 
altumii , Rem., beziiglichen Angabe. Z. geol. Ges. 1888, p. 586. 
Sampson, F. A. Notes on the Subcarboniferous Series at Sedalia, Mo., 
with descriptions of two New Species of Carboniferous Trilobites, 
by A. W. Yogdes. New York : 1888, 8vo. Tr. N. York Ac. Sci. 
vii, p. 246. 
Phillipsia sampsoni, n. sp., Waverley Series, Sedalia, p. 3 (248). 
Grijfithides (?) sedaliensis , n. sp., Waverley Series, Sedalia, p. 4 (249). 
Stainier, X. Note sur un Trilobite nouveau et sur les Pentamerus des 
Calcaires d’Hum&^e. Ann. Soc. gdol. Belg. xiv, p. 75, 
Dechenella striata , n. sp. 
Yogdes, A. W. The Genera and Species of North American Car- 
boniferous Trilobites. Ann. N. York Ac. iv, pp. 69-105, pis. i-iii. 
ProetuSy p. 74. pi. ii, figs. 1 & 2 ; missouriensis (Shum.), syn. shumardi 
(Herrick), p. 75, pi. iii, fig. 1 ; longanensis (Hall), p. 78 ; peroccidens 
