Vol. 58. j MR. F, R. C. REED ON THE GENUS LICHAS. 61 
Ceratouicms, Hall & Clarke, 1838 (Pal. N.Y. vol. vii, p.8+ & pl. xix 4, figs. 7-13). 
Type, C. gryps, Hall, 1888. 
Covoricuas, Dames, 1877 (Zeitschr. Deutsch. Geol. Gesellsch. vol. xxix, p. 806 
& pl. xiii, fig. 5). Type, C. equiloba (Steinhardt) 1874 (‘ Die in preuss. 
Geschieb. gefund. Trilob.’ p. 30 & pl. iit, fig. 6). 
Coxypocernatus. Corda, 1847 (‘ Prodr. Bohm. Trilob.’ p. 139 & pl. vii, fig. 74). 
Type, C. flabellatus, Corda = Lichas palmata, Barrande, 1846 (Not. 
Prélim. Syst. Silur’ p. 54)=Trochurus speciosus, Beyrich, 1845 pars 
(pygidium, not head), ‘ Ueb. Bohm. Trilob.’ p. 31, fig. 14, and Barr, ‘Syst. 
Sil. Boh.’ vol. i, p. 599. [Owing to the uncertainty attaching to Corda’s 
types, Dr. Giirich (Neues Jahrb. Beilage-Band xiv, 1901, p. 526) would sub- 
stitute the name Plusiarges for Corydocephalus, type Pl. palmatus (Barr. ). | 
[Craspeparces, Girich, 190i (Neues Jahrb. Beilage-Band xiv, p. 532 & pl. xviii, 
fiz. 1). Type, Cr. Wilcannie, Girich. ] 
Dicranoeues, Corda, 1847 (‘ Prodr. Bobm. Trilob.’ p. 145 & pl. vii, fig. 77). 
Type, D. pustulatus, Corda=L. (1) simplex, Barrande, 1846 (‘ Not. Prélim. 
Syst. Silur.’ p. 55). Hall (Pal. N.Y. 1888, vol. vii, p. 86) proposed to 
revive Corda’s name for subgeneric use. [Dr. Girich (Neues Jabrb. Beilage- 
Band xiv, 1901, pp. 528-29) would substitute the name Liparges for Corda’s 
Dicranogmus. | 
Dicrayovettis, Corda, 1847 (‘Prodr. Bohm. Trilob.’ p. 14] & pl. vii, fig. 75). 
Type, D. scabra, Beyrich, 1845 (Lichas scahra, ‘ Veb. Bohm. Trilob.’ p. 28 
& fig. 16). [Dr. Gurich (Neues Jahrb. Beilage-Band xiv, 1901, p. 525) 
proposes the name Z7achylichas in place of Corda’s Dicranopeltis. } 
[Ecurroricnas, Gurich, 1901 (Neues Jahrb. Beilage-Band xiv, p. 530). Type, 
L. Eriopis, Hall (Pal. N.Y. 1888, vol. vii, p. 78 & pl. xixa, figs. 2-13, 
15, 16). 
[Evarces, Giirich, 1901 (op. cit. p. 527) = Acanthopyge, Corda. Type, L. Haueri, 
Barr. ] 
[Hemrarces, Girich, 1901 (op. cit. p. 526). Type, L. wesenhbergensis, Schmidt 
_ (Rev. Ostbalt. Silur. Trilob.’ pt. ii, 1885, p. 44 & pl. vi, figs. 1-4).] 
Homouicenas, Schinidt, 1885 (op. cit. pp. 31, 94). Type, L. depressus, Angelin 
1854 (‘ Paleont. Scand.’ p. 70 & pl. xxxvi, figs. 4, 4a)" 
Hopto.icuas, Dames, 1877 (Zeitschr. Deutsch. Geol. Gesellsch. vol. xxix, p. 794, 
pl. xii, figs. 1-3, & pl. xii, fig. 1). Type, A. tricuspidata (Beyrich) 1846 
(Lichas tricuspidata, *‘ Untersuch. ub. 'frilob.’ p. 7 & pl. i, fig. 7 head.) 
Letoticuas, Schmnidt, 1885 (‘ Rev. Ostbalt. Silur. Trilob.’ Mém. Acad. Imp. Sci. 
St. Pétersb. voi. xxxiil, no. 1, pp. 29-80, 46 & pl. iii, figs. 27-31). Type, 
L, tilenoides (Nieszkowski) 1857 (‘Mon. Trilob. Ostseeprov. Archiv f. 
Naturk. Liv-, Ehst-Kurlands, ser. 1, vol. i, p. 622 & pl. iii, figs. 3-5). 
Licuas, Dalman, 1826 (‘ Ueber die Palwaden’ 1828, pp. 53, 71, 72 & pl. vi, 
fig. 1). Type, L. laciniatus (Wahlenberg) 1821 (Nov. Acta Soc. Reg. Sci. 
Upsala, vol. viii, p. 54 & pl. ii, fig. 2. Hntomostracites laciniatus). 
[Liearces, Girich, 1901 (Neues Jahrb. Beilage-Band xiv, pp. 528-29) = Di- 
cranognus, Corda. ‘Type, L. simplex (Barr.).| 
Mertorias, Eichwald, 1842 (‘Urw. Russ].’ pt. li, p. 60 & pl. iii). Type, 
M. Hiibneri, Kichwald (op. cit. p. 62 & pl. iu, figs. 21, 22). Owing, 
however, to the application of the name Metopias to a genus of Coleoptera 
in 1832 by Gory (Guérin’s Mag. Zcol. vol. 1, pl. 42), it has to be relin- 
quished here. [Dr. Gurich (Neues Jahrb. Beilage-Band xiv, 1901. p 521) 
proposes the name Metopolichas for this subgenus. ] 
