PLATE II. 



Figs. page 



1 — 3. Gonularia tenuis, sp. nov. . . . .21 



1. Slab of Calciferous Sandstone from Glencartholm, showing numerous 



specimens attached by their apices. Geological Survey Museum, Edin- 

 burgh, no. 1. 



2. Compressed specimen from the same locality, showing the thinness of the 



shell, x 2. British Museum (Nat. Hist.), no. G. 17661. 



3. Ornamentation of another specimen, x 10. 



4. Gonularia tenuis, var. maculosa, nov. British Museum (Nat. Hist.), 



no. Gr. 17G63. Ornamentation. X H> . . . 23 



5. Gonularia, sp. (margaritifera Salter ?). Sedgwick Museum, 



Cambridge . . . . . .24 



5 a. Small specimen from the Skiddaw Slates, Brunstock Scar, x 2. 5 b. 

 Small portion of the shell by the central facial groove, showing the fine 

 ornamentation, x 5. 5 c. Ornamentation, x 20. 



6 — 9. Gonularia mieroscopica, sp. nov. . . . .24 



6. Specimen nearly complete and uncrushed from the Wenlock Shale of 



Buildwas. x 2. Museum of Practical Geology, no. 12628. 



7. Imperfect flattened specimen from the same locality, showing the crumpled 



shell, x 2. British Museum (Nat, Hist.), no. G. 17668. 



8. Cross-section near apex of another specimen, x 2. 



9. Ornamentation, x 100. 



10. Gonularia, sp. British Museum (Nat. Hist.), no. Gr. 11798 . 25 



10 a. Specimen from the Wenlock Limestone of Ledbury showing one face. 

 10 I. Marginal groove, x 10. 10 c. Ornamentation, x 20. 



