PALEOZOIC. 



GASTEEOPODA. 



CAMBEIAN AND SILURIAN. 



CAMBBIAN. LOWEE SIl. 



TJPPEE SII/UEIAN. 



SPECIES. 



f 



w 



Selicotoma Salter, 185& , 



HALIOTID.fi. 

 Holopea * Hall, 1 842 ... . 



— carinata Forbes 



coucinna M'Coy 



conica Forhes 



constriota M'Coy 



Fortes 



... Forbes 

 — striateRa Sow. ., 



TtTEEITELLlD.S. 



Holopella M'Coy, 1852 ... 



Twrritella {part) 



— cancellata Sow 



conica Sow. 



gracilior M'Coy 



gregaria Sow. ... 



— intermedia M'Coy 



— monile M'Coy 



— otsoleta Sow. ... 



— plana M'Coy 



— tenuicincta M'Coy 



Eormotoma Hall , . 



LlTOEINIDJS. 

 Litorina Ferrusac, 1821 



— corallii Sow 



— octavia M'Coy 



— undifera M'Coy 



Pyeamidellidj;. 

 Loxonema Phillips, 1 841.. 



— elegans M'Coy 



— obscwra Portl 



— sinuosa Sow 



112 



REFERENCES. 



Vide OlJhileta. 



HOLOSTOMATA. 



* The genera Holopea, Holopella, Cyclonema, &c. are so 

 closely allied that it is difficult to separate them. 



MSS. Sali. Mem. Geol. Surr. vol. iii, p. 348, woodcut, p. 347, 

 No. 14, f. 4. 



Naticopsis, Synop. Sil. Poss. Irel. p. 13, 1. 1, f. 10. Holopea, 

 Siluria, 4 ed. p. 197, Foss. 40, f. 5. 



MSS. Salt. Mem. Geol. Sui-v. vol. iii, p. 347, woodcut. No. 14, 

 f. 2. 



Trochus, Brit. Pal. Foss. p. 296, 1. 1 K, f. 41. 



MSS. Salt. Mem. Geol. Sui'v. vol. iii, p. 347, woodcut. No. 14, 

 f. I. 



MSS. Salt. Mem. Geol. Surv. vol. iii, p. 347, woodcut. No. 14, 



f-3. 

 Litorina, Sil. Syst. p. 612, 1. 19, f. 12. Holopea, Silmia, 



4 ed. t. 7, f . 4. Troclms constricfv.s, M'Coy, Brit. Pal. 



Foss. p. 296, 1. 1 K, f. 41. 



HOLOSTOMATA. 



Turritella, Sil. Syst. p, 642, 706, t. 20, f. 18. MiircTiisonia 

 polyglypha, Phill. Mem. Geol. Surv. vol. ii, pt. 1, p. 357, 

 t. 14, f. 3. Holopella, Siluria, 4 ed. 1. 10, f. 14, p. go, 

 Foss. 15, f. 8. 



Turritella, Sil. Syst. p. 604-706, t. 3, f. 7, 8. Holopella, 

 Silm-ia, 4 ed. t. 34, f. 10, t. 35, f. 26. 



Brit. Pal. Foss. p. 303, 1. 1 K, f. 33. 



Turritella, Sil. Syst. p. 603, t. 3, f. I. Holopella, Siluria, 

 4 ed. t. 34, f. 10; ib. M'Coy, Brit. Pal. Foss. p. 303. 



Brit. Pal. Foss. p. 304, 1. 1 L, f . 16. 



Brit. Pal. Foss. p. 304, t. i K, f. 32. 



Turritella, Sil. Syst. p. 603, 706, t. 3, f. 7. HolopeUa, 

 Siluria, 4 ed. t. 9, f. 28; 1. 10, f. 14, t. 34, f. 11. 



Turritella, Synop. Sil. Foss. Irel. p. 12, 1. 1, f. 6. 



Brit. Pal. Foss. 1. 1 L, f. 17. 



Vide Murchisonia. 



HOLOSTOMATA. 



Vide Cvclononia. 



HOLOSTOMATA. 



Brit. Pal. Foss. p. 302, 1. 1 K, f. 34. 



Vide Murchisonia. 



Terebra. Sil. Syst. p. 619, t. S, f. 15. Loxonema, Siluria, 

 4 cd. t. 24, f- 0- 



