PALOZOIC. BRACHTOPROD A, CAMBRIAN AND SILURIAN. 
CAMBRIAN. LOWER SIL. UPPER SILURIAN. 
-- ye 
SPECIES. REFERENCES. 
Lower Ludlow. 
| Tilest. & Passage. | J 
Pass up. 
| Low. Llandovery. 
Up. Llandovery. 
| Woolhope Linst. 
| Wenlock Shale. 
Wenlock Lmst. 
Aymestry Linst. 
| Upper Ludlow. 
| Har. St. David’s. 
| Meneevian. 
| Lingula Flags. 
Llandeilo. 
Caradoc or Bala. 
Tremadoc. 
Atrypa (continued). 
— Phemispherica Sow. ............ mer lera (seal aed (ee ves] Pl ge [ie |esefare[ees|eoeleac]eoefeee|-ee] Sil. Syst. p.637, t. 20, £75 ib. Hall, Pal. New York, vol. ii, 
p. 74, t. 23, f.11a-g. Atrypa, Salt. Siluria, 2ed. p. 100, 
f. 4, t.9, £.3. Hemithyris, M‘Coy, Brit. Pal. Foss. p. 201 
(and var. Scotica, p. 202). Leptocelia, Billings, Cat. Sil. 
Foss. Anticosti, Geol. Surv. Canada, p. 48. A. hemispherica, 
Davy. Mono. Brit. Sil. Brach. Pal. Soc. p.136, t. 13, £.23-30; 
ib. Siluria, 4 ed. p. 90, Foss. 15, f. 4, t.9, f.3. (Rhyn- 
chonella, Auct.) 
Dav. Mono. Brit. Sil. Brach. Pal. Soc. t. 22, f. 1-8. 
Tereb. Sil. Syst. t.13, £. 27; ib. Siluria, t. 22, f.19 (lower 
figs.); ib. Dav. Mono. Brit. Sil. Brach. Pal. Soc. p.135, 
t.15, £.3-8. TLereb. marginalis, Barr. Sil. Brach. Bohmen, 
p- 79; t. 19, £.10. 
Vide Rhynchonella. 
Mono. Brit. Sil. Brach. Pal. Soc. p. 203, t. 24, f. 30; t. 25, 
f. 7, 8, 1868. 
Vide Orthis. 
Tereb. Kongl. Akad. Handl. p. 143, t.6, £.6; ib. His. Leth. 
Suecica, p. 81, t. 23, £.8 ; ib. Sow. Sil. Syst. t.12, f.12; 
ib. Siluria, 4ed. t. 9, f. 2; t. 22, f£. 19 (two up. figs.); ib. 
Dav. Mono. Brit. Sil. Brach. Pal. Soc. p. 133, t. 15, 
ip 1 735 
Var. of A, reticularis, Linn. 
Anomia, Syst. Nat. 12ed. p.1152. Tereb. asper, Schloth. 
Leonh. Taschenb. p. 74, t.1, £.7. Z. priseus, ib. Petref. 
p. 262: Nachtr. t.17, f.2; t. 20, f.4. Tereb. affinis, 
Sow. M.C. vol. iv, p. 324, f.2. Atrypa reticularis, Dalm. 
Vet. Akad. Verhandl. p.127, t. 4, f. 2; ib. His. Leth. 
Suee. p. 75, and var. B, alata; ib. t. 21, f.11a. Atrypa 
affinis, Sow. Sil. Syst. t. 6, £.5. A. aspera, id. ib. t. 12, 
f.5. <A. orbicularis, id. ib. t.19, f. 3. Tereb. reticu- 
laris, Murch. Vern. and Keys. Russ. and Ural, p. 91, 
t.10, f.12; ib. Barr. Sil. Bohmen, p. 95, t. 19, f. 8, 9. 
Atrypa, Hall, Pal. New York, vol. ii, p. 72, 270, t. 23: 
ib. Siluria, 4 ed. p. 90, Foss. 15, f.5; t.9, f.1; t. 21, 
f.12, 13: ib. Dav. Mono. Brit. Sil. Brach. Pal. Soc. 
p. 129, t.14, f£.1-22; ib. Billings, Geol. Canada, p. 318, 
f. 335. 
Vide Rhyn. Llandoveriana. 
ES LICIDESUE ME eee taeda sieatiensiacess SRc\ eal 6 joes (acs Poul [esta lores ier pod [aeal Gae| focal feos! 84 |e sae 
— incerta 
— lenticularis...... Dalitceictecscesss Roel Nase fasol hese tao tBalSenioch hee a6 (diol acid fared (dog [soa land| eae 
— marginalis ...... Dal........60... Foo Maal noel ord (see Sod) hea] ss eet | 3 | heart fond) Ised lane fon 
— orbicularis ...... Sorgsm Secevenee Bal laeltoenl land [nae sielleas|eselaee fa8| oor aoc oaa [atid [sacl noel feo 
— reticularis ...... LAN ay secn tooo 660 s-Al050 load loc cosfese| se Poe | a | oe ed ae | oR |e Teas| eee 
ERIE pA opr eR SSA PCLIIN SOOO SSOCES 200) !bo4' load fod |e Ioeg fon [sod [aos Sp4| lor Iseel kaa aoe }oan eal lens 
— Scotica ......... SE COU) tea cteun te calles sliedelers| oes ceclecal ae Jeoe|eceles|cec[eee{eee]eee{ee.[.e.| Zemithyris hemispherica, var. Scotica, Brit. Pal. Foss. p. 202, 
t.1 H, f.10. Atrypa, Q. J. Geol. Soe. vol. vii, p. 178, 
t. 9, f.12, var. Scotica. Atrypa Scotica, Dav. Mono. Brit. 
Sil. Brach. Pal. Soc. p. 140, t.13, £. 31; ib. Billings, Geol. 
Canada, p. 318, f. 337. 
Camerella...........4 Billings, 1865...|...|...| =--|-+-[>++] +e pel kaas| He vealevefoce[eos|ooefene|eeeeoo] Vede Merista. 
PRODUCTIDS. 
Chonetes............ Fischer, 1837... 
7 Von Buch ......|\.--|--- sas| toes} jocal aoa hcl Bed Bee veclecelece{eee{eeefeecfeee[eee| 272@@e Chonetes striatella. 
— levigata......... ISIE T eansoosoon4) (oo4 [eas sc lone Heal lene ge Jose] ae [ace] ae | xe fooe{eee|ees]eoeleos| Deptena, Sil. Syst. t.13, f. 3. Chonetes, Siluria, 4 ed. t. 20, 
f.15 (Leptena). Lep. lepisma, Salt, Mem. Geol. Surv. 
vol. ii, p. 284, t. 26, f. 3. Lept. levigata, Salt. Siluria, 
ged. t. 20, f.15. Lept.? Dav. Mono. Brit. Sil. Brach. 
Pal. Soc. p. 328, t. 49, £. 1-12. 
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