PALMOZOIC. CRUSTACEA CAMBRIAN AND SILURIAN. 
CAMBRIAN. LOWER SIL. UPPER SILURIAN. 
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HISISIGIS ISIS |S IFIEIE ISVS Ia Ie 
Asaphus (continued). 
ES SPIPAS oo seecacssys De Kay ......... Ane ICED lesa Ipeet baal foodl 7s} lear) (oec serface|eoe|oaeleeefere|ece|eee! (Zsotelus), Lye. Nat. Hist. N. York, vol.i, p. 176, t.12, 13, 
f.1,2. <Asaphus platycephalus, Stokes, Trans. Geol. Soc. 
I ser. vol. viii, p. 208, t. 27, 1822. Iso. gigas, I. planus, 
Portl. Geol. Rept. p. 295, t.8, f.7; t. 7, f. 2,3. TI. gigas, 
Hall, Pal. N. York, vol. i, p. 231, t. 60, £. 7, t. 61, f. 3, 
4, t. 62, f. 1, 2, t. 63. Asaphus, (Isotelus) gigas, Salt. 
Mem. Geol. Surv. Dec. XI, Sec. 3, p. 1, t. 3. JZ. ovatus, 
I. sclerops, Portl. Geol. Rept. t. 8, f.5, t.10, f.2. Asaphus, 
CIsotelus) gigas, Salt. Mono. Brit. Sil. Trilob. Pal. Soc. 
1866, p.161, t. 24, £.1-5, t.25, f.1 (var.); ib. Siluria, 
| 4ed. p. 174, Foss. 29, f.1. Isotelus intermedius, Portl. 
Geol. Rept. t.9, f..5; ib. Salt. Pal. Soe. loc. cit. p. 169, 
t. 25, £.1 (var.). 
— Homfrayi ...... SGlE arm canbe Bee fend (ee) Ne es feb5| feo tow) (cee seefecefeoe|ecfeeefeoe{eeeleee| Mem. Geol. Surv. vol. ili, p. 311, t. 8, f. 11-14; ib. Mono. 
Brit. Sil. Trilob. Pal. Soc. 1866, p. 165, t. 24, f. 6-12; 
ib. Siluria, 4 ed. p. 203, Foss. 45, f.9. 
— hybridus......... Sali neecccsncaete Spal (aod |on [aba [ean | [Eel loed| boo serfece[oee|ese|ees[eee]eee|ese| (Baszlicus), Mono. Brit. Sil. Trilob. Pal. Soc. 1866, p. 153, 
GARY tints Oh 
— insperatus ...... iXaha, gsdecoaduece Sot |a50| 580i <2) [o85) \0el!pe0) land [eon Bag] [o04| {so fase }o00! lena) lene loc 
— intermedius...... POrblansastcnsen S| G04} 0 farsa] lo caalliase| ere ese ses[ece|sss|ereless|eoe|es|eea] Ve@e A. gigas. 
MULE ONS lc anclenienésseiseccneenaw saunas sesfecs|ece|ooefers cet logo| eae) oe see[eee[eee]--sfeee]ees]eee{-..| Wade Stygina latifrons. 
— laticostatus...... M‘Coy ......... pel eed load [and) ood #3 ||psel Bod [oad sesecafeee|eoe|oee|eee{oee|eee| Lsotelus (Basilicus), Brit. Pal. Foss. p. 170, t. 1 EH, £. 18; 
ib. Salt. Mono. Brit. Sil. Trilob. Pal. Soc. p. 158, t. 18, f. 6. 
— leviceps ......... ISITE) cadopao5deo0 Meclioas (eee |e fleee Sod [acl oa loc sec[ass[oseleos|[soeleee[eo-]--.| Vade Asaphus scutalis. 
— marginatus...... TRO RB oooepo 5005" fool aol weal foo loan coat deti\kicn) 420 secfees{ere{seefeesfeos]eee|---| Meide Stygina latifrons. 
— Marstoni......... Rite “opneconobodh S58) fons) ose mod Jane soul |load psd vesfeeelece|ees|eosfareleeefeee| (Basilicus), Mono. Brit. Sil. Trilob. Pal. Soc. 1866, p. 156, 
Ub Pep tig Lc 
— Menapie......... SHACK Siewnec ons pot fpae|/ 405] (ood hea fone kodol dad] loon seclreefece[eoefees{eeefeee|eee] Cat. Camb. and Sil. Foss. Camb. Mus. p. 23. 
— OVAIUS ......00000 ROM laevacececen 664] |Se6||oce| lot} Sad *3llocollocd on ses[ece[eas[ecsfecs[eee[eseles| Wade A. gigas. 
— peltastes ......... ISGliapene secs dias Bq) [ooo Inacl lead loon al leel les] [abs ses[eeleeelece[eee]eee{eee|-e.] (Baselicus), Mono. Brit. Sil. Trilob. Pal. Soc. 1866, p. 152, 
t. 22, £.1-4. 
— Powisii ......,.. Mair chs Gevecsase Be Meas teal bee ects [lle Moca fone Pee leee leat eealseoleee|seslses|) SUSY Ste te23.kO1Cs! Lbs shortly p.120/75) 1b-10,uetmtsmebe 
Salt. Mem. Geol. Surv. Dee. I, t. 3, p.5; ib. Siluria, 
4ed. p. 204, Foss. 46, f.1, t.2, f. 2. A. (Basilicus), 
Salt. Mono. Brit. Sil. Trilob. Pal. Soc. 1866, p. 154, t. 23, 
f. 2-7; ib. Mem. Geol. Surv. vol. iii, p. 312, t. 15, 
f. 1-5. 
— radiatus ......... Salt. ....... feebo)| lose (acd aed |acdl foc frre sed lean dees seslecslece{ecefeee{eee]ooefeee| Ogygia, App. Burmeister, Org. Trilob. Ray. Soc. p. 125. 
Isotelus, (Basilicus) laticostatus, M‘Coy, part, Brit. Pal. 
Foss. t. 1 E, f. 18. Asaphus, Mem. Geol. Surv. vol. iii, 
p- 311, t. 23, f. 7; ib. Mono. Brit. Sil. Trilob. Pal. Soe. 
1866, p.157, t.18, £.1-5. 
— rectifrons ...... J Riff eeencoconece Soclane)| |eoa| toad bos Bed lia eee aod ses[ecs]ese[ese]eee{ess|ees[eee| (Zsotelus), Geol. Rept. p. 298, t.9, f.1, t.8, f. 2, 3, 7, head. 
, T. arcuatus, ib. t.9, f£. 2, 3, tail. Asaphus (Brachyaspis), 
rectifrons, Salt. Mono. Brit. Sil. Trilob. Pal. Soe. 1866, 
p. 166, t. 25, f. 6-10. ? A. levigatus, Angelin, Pal. Surv. 
t. 29, £.1. 
= CCLON ODE reise sean davcvovsoeunarsanaies Beal ood coo) bol Iaco nod ooo) ese fede neallecelaealRes|ees|eaulces| ens PARA WAN OI SES: 
— scutalis ......... SALE” Sutarwacers moll eal eal eaaleee mand toeillecehae sesfuss|css[ecsece|eee{eee{eee] (Oryptonymus), Cat. Foss. Mus. Pract. Geology, p.53 ib. 
Mono. Brit. Sil. Trilob. Pal. Soc. 1866, p. 169, t. 25, f. 2, 3. 
Tsotelus leviceps, Portl. Geol. Rept. p. 299, t. 9, f. 4 
(non Dalman). Asaphus, (Crypton) leviceps, Salt. Mem. 
Geol. Sury. Dec. XI (As. gigas), sec. 3, p. 4. 
— Selwynii 0... ISAS eo edacerter Nee er (Se) be Fl leclteed bbc sesfacs{oee|ese{ece{eee{eee[ eee] Wade Ogygia Selwynii. 
— Solvensis......... SEIRCHS re xccses sis Fae (oe fecal pee Wel foe Intel cel os vec[esclece|eee|eeeleee{eee]e-e| Cat. Camb. and Sil. Foss. Cambr. Mus. p. 23. 
— Stokesii ......... Murch. s.cosease soaltetdl hws  baeivns eulicure eed ee sesfeca{ens[eae{eee{oee|oee{eee| Vede Proetus Stokesii. 
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