PALEOZOIC. 



CONCHTFERA. 



CAMBRIAN AND SILURIAN. 



CAMBRIAN. LOWEE SIL. UPPER SILURIAN. 



SPECIES. 



Ctenodonta (continued). 



— laevis Sow. . 



— levata Hall . 



— lingualis Phill. . 



— Menapiensis ... Hicks. 



— obesa Salt. . 



— obliqua Vortl.. 



ovalis Sow. 



poststriata Emm. 



protei Miinst. 



quadrata M'Coy 



radiata Portl. ... 



regnlaris Portl 



rhomboidea Phill. ... 



rotunda Sicks . . . 



scitula M'Coy 



semitruncata . . . Portl 



subacuta M'Coy 



subaqualis Soto. ... 



subcy lindrica ... M 'Coy 

 subtruncata . . . Portl. . . . 



sulcata His. ... 



thracioides Salt. ... 



transversa Portl. . . . 



varicosa Salt. 



Arcade. 



Cucullella M'Coy, 1851 .. 



Bedonia Souault, 1851. 



— angliea Salt 



— angulata Baily 



— antiqua , Sow 



— Cawdori Sow. 



— coarctata Phill. 



— ovata Sow. 



Cyprioardia Lam. 1817. 



— cymbaformis ... Sow 



O 



P 



REFERENCES. 



Nucula, Sil. Syst. t. 22, f. 1 ; ib. Siluria, 4 ed. t. 7, f. 3. 



Nucula, Pal. New York, t. 34, f. 1 ; ib. M'Coy, Brit. Pal. 

 Foss. p. 285, t. 1 K, f. 4, 5. 



p. 367, t. 22, f. 6. 



Nucula, Mem. Geol. Surv. vol. ii, pt 



Q. J. Geol. Soc. vol. xxix, p. 47, t. (, f. 6, 7. C. rotunda, 

 Hicks, Cat. Camb. and Sil. Foss. Woodw. Mus. Cambr. p. 24. 



Mem. Geol. Surv. Geol. Edinb. sheet 32, p. 141, t. 2, f . 1 1, 1 2. 



Area, Geol. Rept. p. 429, t. 34, f. 6. Area cylindrica, id. 

 ib. p. 428, t. 34, f. 9. Ctenodonta, Siluria, 4 ed. p. 196, 

 Foss. 39, f. 6. 



Vide C. angliea. 



Nuculites, Hall, Pal. New York, t. 34, f . 2 ; t. 82, f. 10 : 

 ib. M'Coy, Brit. Pal. Foss. p. 286, 1. 1 K, f. 6. 



Beitr. heft 3, t. 2, f . 9 ; ib. M'Coy, Synop. Sil. Foss. Irel. 

 p. 19. 



Area, Synop. Sil. Foss. Irel. p. 20, t. 2, f. 5. 



Nucula, Geol. Rept. p. 430, t. 36, f. 11. 



Area, Geol. Rept. p. 427, t. 34, f. 2. 



Nucula, Mem. Geol. Surv. vol. ii, pt. 1, p. 367, t. 22, f. 7. 



Vide Cteno. Menapiensis. 



Area, Synop. Sil. Foss. Irel. p. 20, t. 2, f. 6. 



Pectunculus, Geol. Rept. p. 429, t. 34, f. 7. 



Nucula, Synop. Sil. Foss. Irel. p. 19, t. 2, f. 3. 



Vide Area subaqualis. 



Nucula, Synop. Sil. Foss. Irel. p. 19, t. 2, f. 4. 



Vide C. transversa. 



Leth. Suec. Supp. 2, p. 3, t. 40, f. 2. 



Mem. Geol. Surv. Geol. Edinb. sheet 32, p. 141, t. 2, f. 13. 



Area, Geol. Rept. p. 428, t. 34, f. 4. ? A. subtruncata, id. 

 ib. p. 427, t. 34, f. 1. 



Nucula, Q. J. Geol. Soc. vol. x, p. 75. Ctenodonta, App. 

 Mem. Geol. Surv. vol. iii, p. 345, woodcut, p. 343, f . 1 . ? Nu- 

 cula Uevata, M'Coy, ib. Siluria, 4 ed. p. 1 96, Foss. 39, f . 4. 



SIPHONIDA (iNTEGllOPALLIALIA). 



Vide Redonia. 



Geol. Surv. Irel. Expl. sheet 135, i860, p. 13, f. 4. 



Cucullcea, Sil. Syst. t. 3, f. 1 and 12 a. Cleidophorus, Hall. 

 Cucullella, M'Coy, Brit. Pal. Foss. p. 284. Area sub- 

 antiqua, D'Orb. Prod. Etage 1. C. autiqua, Siluria, 4ed. 

 t. 34, f. 16. 



CueuUaa, Sil. Syst. t. 3, f . 1 1 . Cucullella, Siluria, 4 ed. 



t. 34. f- 3- 

 Nucula, Mem. Geol. Surv. vol.ii, pt. 1, p. 366, t. 22, f.1-4. 



Cucullella, M'Coy, Brit. Pal. Foss. p. 284. 



Cuculliea, Sil. Syst. t. 3, f. 12. Area suborata, D'Orb. 

 Etage 2, No. 639. Cucullella, M'Coy, Brit. Pal. Foss. 

 p. 284 ; ib. Siluria, 4 ed. t. 34, f . 1 7. 



SIPHONIDA (iNTEGllOPALLIALIA). 

 Vide Goniophora cyinbseformis. 



103 



