CRUSTACEA: CAMBRIAN AND SILURIAN 
PALHOZOIC. 
ee a a a I a a Ea oe 
CAMBRIAN. LOWER SIL. 
UPPER SILURIAN. 
eo Sn oO — 
S| |e S\Ele eislelelele|& 
5 op a} > EVENS oO) 
Alalele| |s/slelelal@ tele eel 
SPECIES. sldlalS| (leelsisteieris REFERENCES, 
U Pi le} a - 
al S{SIELElElElElclereleleleler 
Ae te |S a NS Palm 
_ (SSIRBISRISSISERFIE S| <5 18 : 
| | | | — | — | 
Trinucleus (continued), 
ee LTS Ave acanssers Port, cccccccecenfere{eee|oee|orepere[eee| eee] eeepere[ees Vide T. concentricus. 
— Lhoydii ........ Marche cecoccecs|ere[eoefece|esefees| oe | a [oecfeesfeee[ eee] eee] eoelece| eos] oes Sil. Syst. p. 660, t. 23, £,4; ib. Siluria, 4 ed. p.51, Foss. 11, 
f. 7, t. 4, f. 6; ib. Salt. Mem. Geol. Surv. Dec. VII, t. 7. 
— Murchisonii ... S@lt, c.cceccsesee[eeefeceeeefereP oe feee[eeedecsPeesd os Siluria, 2ed. p.50, £.7; 4ed. Foss.9, f.7, p. 48; ib, Mem. 
Geol. Surv. vol. iii, p. 318, t. 11 B, f. 4. 
— OPNALUS seeccscee Sbernb.  cccccaccal|eceece|eoe|eeePece]ore|eeelecsPere|eee|eos|eneleve| eee] aee[ers|one Vide T, concentricus, 
— radiatus ........ Murch. vecccveeefors era eof es] Pal| aed aera etl es ]ioes'l ema (eecl| (mallet ies ne Sil. Syst. p. 660, t. 23, f. 3; ib. Siluria, 4 ed. t. 4, f.8; ib. 
Portl. Geol. Rept. p. 264, t.1 B, f.9; ib. Dec. VII, pt. 7, 
p. 8. (Tretaspis.) 
— Ramsayi,,,.....- FFQCKS coc cveveussn| ees] Aliscel Bes all est] fone! nos! fecal lect [ooo] facto Q. J. Geol. Soc. vol. xxxi, p. 183, t. 10, f. 1, 2. 
— Sedgwickii ...... Salt. cecccccccees{enn|oee[ocefoodf ok [a [ece]eeePeeefenedeee|oee] ane] eee Mem. Geol. Surv. vol. iii, p. 319, t.12, f. 9. 
== HORICOLTIS) cv cvac 2D ESsrecvsceverecens|lees|(ess|(ne| ecu] oss] ewe|(3:|(s04f us| omellnel lacy inns Asaphus, Leth. Suec, t.37, £.2; ib. Portl. Geol. Rept. p. 263, 
t.1 B, £.8. TZ. radiatus, ib. f.9. Tretaspis, M‘Coy, Brit. 
Pal. Foss. p.147. T. seticornis, Siluria, 4ed. p.69, Foss. 14, 
f.1,2; ib. Dec. VII, pt. 7, p. 7. (Tretaspis.) 
— tessellatus ...... Green ...... aaBooe uel fcod Inca! fase) opel bod focal lead aoc] ico ftiod] foot [od] [Gnal esol fool joFso Vide T. concentricus, 
— thersites ......... ISTE no opann Rood (00 foag] eee Hee facd |) foe Inodl lade! lecal (oad) |oical [ancl facie. Mem. Geol. Surv. Dec. VII, sect. 7, p. 7. 
LICHADIDE. 
Tr OChUTUS 66 .eecee ees Beyrich, 1846..|...)...)...fecfese|eoe]eee]eefers Vide Lichas. 
CrmRIPEDIA. 
Turrilepas,,,... H. Woodward, 1865 
Chiton ...... De Koninck, 1857 
Oploscolex.., Salter .occcccccveeees 
— Wrightianus De Kon. wc... EPA meee eva RUE fie all ae OI Fa «|x Chiton, Bull. de V Acad. Roy, Sci. Belg. 2 ser. vol. iii, p. 199, 
t.1, f. 2, 1857. Turrilepas, H. Woodw. Q. J. Geol, Soc. 
vol, xxi, p. 486, t.14, f. 1a-k, 1865. 
CHEIRURIDE. 
ZEERUS .vcrercracvere Pander, 1832 ...| +.) +. sea|ccefessfoee] cee] eesPooe] coef ees] eee] eeefece| ore] eee] ens Vide Cybele and Encrinurus, 
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