PLATE IV. 



Figs. page 



1. Gonularia hastata, sp. nov. Geological Survey Museum, Edinburgh 29 



1 a. Specimen showing one face, from the Upper Ludlow, R. Esk below 



Henshaw Burn. (Eeg. no. 4623.) 1 b. Ornamentation, x 10. 1 c. 

 Ornamentation. X 20. 1 d. External cast of ornamentation, x 20. 



2, 3. Gonularia plicata, sp. nov. Mrs. Gray's Collection . . 81 



2 a. Uncrushed specimen with square cross-section from the Starfish Bed 



(Upper Bala), Clirvan. 2 b. Marginal groove, x 10. 



3 a. Flattened specimen from the same locality. 3 b. Ornamentation, x 10. 



4 — 6. Gonularia crassa, sp. nov. . . . .32 



4 a. Large specimen from the Wenlock Limestone of Dudley. British 



Museum (Nat. Hist.), no. G. 6271. 4 b. Ornamentation, x 5. 

 5. Cross-section of a slightly compressed specimen from the same locality. 

 Museum of Practical Geology, no. 12510. 



6 a. Small specimen from the same locality. British Museum (Nat. Hist.), 



no. 47832. 6 b. Ornamentation, x 5. 



7 — 11. Gonularia subtilis, Salter . . . . .33 



7 a. Specimen from the Upper Ludlow, Usk, Monmouthshire. 7 b. Orna- 



mentation above the fracture, x 10. 7 c. The same, x 20. British 



Museum (Nat. Hist,), no. G. 4602. 

 8. Specimen from the same horizon at Benson Knot. Sedgwick Museum, 



Cambridge, reg. no. G. 14. 

 '.) a. Flattened specimen from the same horizon at Bradnor Hill, Kington. 



9 b. Ornamentation, x 20. Museum of Practical Geology, no. 12497. 

 10 a, b. Ornamentation of different parts of the same shell from the Whitcliff, 



Ludlow, x 20. 



11. Ornamentation of specimen from Deerhope, Pentland Hills. x 20. 



British Museum (Nat, Hist,), no. G. 8744. 



12 — 14. Gonularia com/planata, sp. nov. . . . .35 



12. Imperfect specimen from the Carboniferous Limestone of Farlow, Salop. 



British Museum (Nat. Hist,), no. G. 17666. 



13. Cross-section of another specimen from the same horizon. 



1 i ". Ornamentation of another specimen, x 10. 14 1>. The same, x 20. 





