PALAOZOIC. 
CAMBRIAN. 
LOWER SIL. 
BRACHIOPODA. 
CAMBRIAN AND 
SILURIAN. 
UPPER SILURIAN. 
| — rhomboidalis 
SPECIES. 
Strophomena (continued). 
grandis 
Var. semiglobosa... Dav. 
Jukesi, 
Orbignyi 
Vern. ... 
Inn. ... 
— plicotis ......... M‘Coy 
— retroflexa 
... Wilek. 
Salt. MS. 
Lingula Flags. 
Tremadoc. 
| Har. St. David’s. 
Menevian. 
Arenig. 
Caradoc or Bala, 
Llandeilo. 
Low. Llandovery. 
Wenlock Lust. 
Lower Ludlow. 
Upper Ludlow. 
Aymestry Lmst. 
Wenlock Shale. 
Tilest. & Passage. | J 
| Pass up. 
* 
REFERENCES. 
Orthis, Sil. Syst. t. 20, £.12,13. Leptena, M‘Coy, Brit. 
Pal. Foss. p. 244. ? Orthis cancellata, Portl. Geol. Rept. 
p. 450, t. 32, f.19. Stroph. grandis, Siluria, 4 ed. p. 68, 
Foss. 13, £.9, t.6, £.6, 75 ib. ‘Day. Mono. Sil. Brach. Pal. | 
Soc. p. 311, t. 46, f. 1-3, 5, 6. 
Trans. Geol. Soc. Glasgow, Pal. Series, Fasc. 1, p.19, t. 2, | 
f. 24; ib. Mono. Sil. Brach. Pal. Soc. p. 311, t. 43, £. 15. 
Mono. Brit. Sil. Brach. Pal. Soe. p. 303, t. 42, £. 18, 19. 
Orthis, Leptena, Vern. Geol. Russ. vol. ii, p. 230, t. 15, f. 3. 
Plectambonites, Pander, Beitr. p. 91, t.19, f.12.  Stro- 
phomena, Siluria, 4 ed. p. 227, Foss. 59, f. 6, 7; ib. Bill. 
Geol. Canada, Pal. Foss. p.128, f. 106. S.imbrex, Pander, 
var. semiglobosa, Dav. Mono. Brit. Sil. Brach. Pal. Soe. 
p. 286, t. 41, f. 1-6. 
Mono. Sil. Brach, Pal. Soe. p. 286. Leptena imbrex, De Vern. | 
Geol. Russ. vol. ii, p. 230, t. 15, f. 3.¢; ib. Dav. Lond. 
Geol. Jour. vol. i, p. 55, t.12, £. 25-28; ib. Bull. Soe. 
Géol. France, 2 ser. vol. v, p. 318, t.3, £.8. Strophomena, 
Billings, Geol. Surv, Canada, Pal. Foss. vol. i, p. 128, | 
f. 106. 
Mono. Brit. Sil. Brach. Pal. Soc. p. 296, t. 27, f. 23-26. 
Orthis, Bull. Soc. Géol. France, 2 ser. vol. v, p. 320, t. 3; 
f.17. Strophomena, Etheridge, Cat. Mus. Pract. Geol. 
p. 41; ib. Day. Mono. Brit. Sil. Brach. Pal. Soc. p. 306, 
t. 42, £.12-14. - 
Salt. and Lindstrém, Nomina Foss. Sil. Gotlandixw, p. 5. 
Stroph. Day. Mono. Brit. Sil. Brach. Pal. Soc. p. 309, 
t. 43, £. 16-20, 
Leptena, Geol. Russ. t.14, f.1; ib. M‘Coy, Brit. Pal. Foss. 
p. 236. 
Anomia, Syst. Nat. vol.i, pt. 2, p.1152.  Orthis, Dalm. 
Tereb, Act. Holm. 26, t.1, f.6; ib. His. Leth. Suec. t. 20, 
£.6. Orthis asmusi, De Vern. Geol. Russ. t.10, f. 17. 
Leptena, M‘Coy, Brit. Pal. Foss. p. 245; Day. Lond. Geol. 
Jour. t.13, f. 8-23. Stroph. Siluria, 4 ed. p. 227, Foss. 59, 
f.3; ib. Bill. Geol. Canada, p. 311, f.315. Orthis minuta, 
Hasw. Sil. Form. Pent. Hills, t. 3, f.1. S. pecten, Dav. 
Pal. Trans. Geol. Soc. Glasgow, vol. i, p.18, t. 3, £. 1-45 
ib. Brit. Brach. Pal. Soc. p. 305, t. 43, f. 1-11. 
Leptagona, Synop. Sil. Foss. Irel. p. 25, t. 3, £5. 
Orthis, Cat. Foss. Mus. Pract. Geol. p. 8, 1865. Strophomena, 
Dav. Mono. Brit. Sil. Brach. Pal. Soc. p. 298, t. 42, 
f. 15-17. 
Conchita, Nachricht, &e. p. 79, t. 8, £. 43,44, 1769. Ano- 
mites, Dalm. (Wahl.) Nov. Act. Upsal, vol. viii, 1827. 
Producta depressa, Sow. Min. Conch. t.459, f.3. Leptena | 
rugosa, His. in Act. R. Ac. Sc. Holm. p. 333, 1826. Lept. 
rugosa et Lept. depressa, Dalm, Vet. Akad. Handl. p. 106, 
107, t.1, f.1,2; ib. Hising. Leth. Suec. p. 69, t. 20, £25 
3. Stroph. rhomboidalis, Dav. Trans. Geol. Soc, Glasgow, | 
Up. Sil. Brach. Pent. Hills, p. 16, t. 2, £.17,18. Leptena | 
depressa, Sow. Sil. Syst. p. 623, 636, t.12, f.2. Leptena 
tenuistriata, ib. p. 636, t. 22, £.2. 8. tenwistriata, Sil. 
4ed. p.68, Foss.13, £.8, t.5, £.15 (non Orthis, id. Sow.). 
Strophomena depressa, Hall, Geol. Rept. 4th dist. New | 
York, p. 77, f.5; p.104, f. 2. Leptena depressa, Barr. 
Sil. Brach, Boh. vol. ii, p. 82, t. 22, £. 4-9. S. rhomboi- 
dalis, Hasw. Sil. Form, Pent. Hills, p. 33, t. 3, f. 33 ib. 
Day. Trans. Geol. Soc. Glasgow, Pal. Ser. vol. i, p. 16, | 
t.2, £.17,18; ib. Dav. Mono. Brit. Sil. Brach. Pal. Soc. 
p. 282, t. 39, f. 1-21, t.44, f. 1. 
97 
