PLATE XIII. 



PAGE 



Beltella verisimilis (Salter). 107 



1. The type specimen, nearly complete but for the tail. Lower Tremadoc, 



Penmorfa Village. Sedgwick Museum. Presented bv Mr. D. 

 Homfray. (Figured by Salter, Mem. Geol. Surv., vol. iii, pi. vi. 

 fig. 1 3.) Nat. size. 



2. Thorax and tail with part of head. Lower Tremadoc, near Penmorfa, 



Portmadoc. Museum of Practical Geology, 10841. Nat. size. 

 2a. Tail of the same specimen enlarged. x 2. 



3. Cranidium and part of thorax, showing glabellar furrows. Lower 



Tremadoc, near Penmorfa, Portmadoc. Museum of Practical Geo- 

 logy, 10839. Nat, size. 



4. Cranidium with long glabella, three thoracic segments attached. F/pper 



portion of Middle Lingula Flags, Nant Cistfaen, Arenig, just above 

 pool. Mr. G. J. Williams' Collection. Nat. size. 



5. Cranidium with shorter glabella, part of thorax attached. Middle 



Lingula Flags, Trinant, above pool. Mr. G. J. Williams' Collection. 

 Nat. size. 



Parabolinella simplex (Salter). 110 



6. Cranidium. Upper Lingula Flags, Penmorfa Church, Portmadoc. 



Museum of Practical Geology, 10217. (Figured by Salter, Mem. 

 Geol. Surv., vol. iii, pi. v, fig. 17.) Nat. size. 



Angelina sedgwicki, Salter. 112 



7. Nearly complete specimen of large size. Upper Tremadoc, Garth, Port- 



madoc. Sedgwick Museum. Nat, size. 



8. Specimen showing hypostome. Upper Tremadoc, Garth, Portmadoc. 



Sedgwick Museum. (Counterpart of 10248 in the Museum of 

 Practical Geology figured by Salter, Brit. Organ. Rem., dec. xi, 

 pi. vii, fig. 5.) Nat. size. 

 0. Uncompressed specimen from a hard bed. Upper Tremadoc, Garth, 

 Portmadoc. Sedgwick Museum. Presented by Mrs. Hughes. 

 Nat. size. 



10. Uncompressed specimen from a gritty bed. Upper Tremadoc, Garth, 



Portmadoc Sedgwick Museum. I 'resented by Prof. Seward. 

 Nat. size. 



11. Cranidium showing course of facial suture, punctations in marginal 



groove, and faint depressions indicating the positions of the obsolete 

 glabellar furrows. Upper Tremadoc, Garth, Portmadoc. Sedgwick 

 Museum. Nat. size. 



12. Young specimen from a gritty bed. Upper Tremadoc, Garth, Portmadoc. 



Sedgwick Museum. Presented by Mrs. Hughes. x 2. 



