240 



ANNELIDA. 



Serpula. 



Tube with three elevated, sharp, serrated keels ; aperture 

 circular. 

 'The Upper Chalk, Norwich. 



17. Seepula capitata.— The Headed Serpula, pi. XCVIII. 

 fig. 43. 



S. capitata. Phillips, Geo. York. I. pi. 14. fig. 16. 



Tube circular, smooth, variously bent, with irregular rings, 

 both ia size and disposition ; a large termination in the form 

 of a head. 



The Lias, Kobin Hood's Bay, Yorkshire, and Lyme Eegis. 



18. Seepula DEPLEXA.— The Winding Serpula, pi. XCVIII. 

 fig. 13. 



8. deplexa. Phillips, Geo. Y'ork. I. pi. 11, fig. 66. 



Tube cylindrical, smooth, winding in diflferent directions. 



The Inferior Oolite, Blue Wick, Y'orkshire. 



19. Seepdla EXTENSA.— The Swollen Serpula, pi. XCVIII. 

 fig. 38. 



8. extensa. Brander, Fos. Hant. pi. 1, fig. 12. 

 Cylindrical, tumid, smooth, with obscure lines of growth ; 

 aperture circular. 



The London Clay, Hordwell. 



20. Seepdla plana.— The Flat Serpula, pi. XCVIII. fig. 41 . 

 8. plana. Woodwai'd, Geo. Norf. pi. 5, fig. 9. 

 Convoluted, depressed, surface smooth ; aperture circular. 

 The Chalk, Norwich. 



21. Seepula filifoemis.— The Thread-shaped Serpula, pi. 

 XCVIII. fig. 14. 



8. filifomis. Sowerby, Geo. Tr. 2nd Ser, IV. pi. 16, fig. 2. 



Tube smooth, cylindrical, of nearly equal diameter through- 

 out ; slightly curved, generally consisting of masses laid side 

 by side, a certain number taking the same curvature, and laid 

 in one direction ; sometimes in branched masses. 



The Greensand, Blackdown. 



22. Seepula socialis. — The Associated Sei-pula, pi. 

 XCVIII. fig, 22. 



8. socialis. Portlock, Geo. Eep. p. 362, pi. 25, A, fig. 

 9, a. b. 



Tube long, thin, smooth, thread-like, and almost straight, 

 loose or bent in all directions, aggregated together in bundles 

 of from two to four inches long ; single tubes are of equal thick- 

 ness throughout ; but the fosciculi are of different dimensions. 



The Carboniferous Limestone, Clogher, Tyrone. 



23. Serpula tuba.— The Tubular Serpula, pi XCVIII 

 fig. 17. 



S. tuba. Sowerby, Geo. Trans. 2nd Ser. IV. p 340 pi 16 

 fig. 3. "■ ' 



Tubes simple, generally sohtary, or seldom exceeding two 

 united ; of uniform diameter throughout ; shell thin. 



The Greensand, Blackdown. 



24. Seepula veemes.— The Worm Serpula, pi XCVIII- 

 fig. 11*. 



8. vermes. Sowerby, Geo. Tr. 2nd Ser. IV. p. 340, pi. 16, 

 fig. 4. 



Tube gradually increasing in size, as it advances in age, and 

 provided with a pretty deep keel along its surface, which is 

 wrinkled transversely. 



The Greensand, Blackdown. 



25. Serpula heptagona. — The Seven-sided Serpula, pi. 

 XCVIII. fig. 33. 



Dentaliiim elephantinum. Brander, Fos. Hant, pi. 1. fig. 11. 

 Tube gradually tapering, with seven rounded longitudinal 

 keels, or projections ; aperture heptagonal. 

 The London Clay, Hordwell. 



26. Seepula tbiseeeata. — The Three-serrated Serpula, 

 pi. XCVIII. figs. 1, 2. 



iS. triserrata. Sowerby, Geo. Tr. 2nd Ser. p. 347, pi. 23, 

 fig. 8. 



Tube attached, thick, triangular, with three thin serrated 

 keels upon its upper angle. 



The Portland Stone, East side of Portland. 



27. Seepula vabiabilis. — The variable Serpula, pi. 

 XCVIII. fig. 18 



8. variabilis. Sowerby, Geo. Tr. 2nd Ser. IV. p. 347, pi. 

 23, fig. 7. 



Tube cylindrical, rough, and having an irregular suture on 

 one or more sides ; a considerable portion attached to extra- 

 neous bodies ; when young the attached portion is triangular. 



28. Seepdla intestinaus. — The Intestinal Serpula, pi. 

 XCVIII. fig. 46. 



8. intestinalis. Phillips, Geo. York. I. pi. 5, fig. 21. 



The outer portion of the tube straight, the lower part twisted ; 

 surface rather rough, with a waved keel on its back ; aperture 

 round ; shell strong. 



The Oxford Clay, and Cornbrash, Scarborough. 



29. Seepula lacerata. — The Lacerated Serpula, pi. 

 XCVIII. fig. 32. 



8. lacerata. Phillips, Geo. York. I. pi. 4, fig. 35. 

 Tube moderately curved, circular, and rather rough ; aperture 

 round, with a slight scar ; shell thick. 



The Calcareous Grit, and the Great Oolite, Scarborough. 



30. Seepula squamosa. — The Scaly Serpula, pi. XCVIII. 

 fig. 37. 



8. Squamosa. Phillips, Geo. York. I. pi. 4, fig. 15. 

 Compressed ; rapidly increasing in width, the surface with a 

 keel along the back ; surface covered with scales. 

 The Coral Piag, Scarborough. 



31. Seepula vortex. — The Whirled Sei-pula, pi. XCVIII, 

 fig. 47. 



8. vortex. Woodward, Geo. Nor. pi. 5. figs. 10, 11, 12. 

 Sub-conic, with four spiral, rounded, smooth volutions, 

 flattened below. 



The Upper Chalk, Norwich. 



