Fie. 
PLATE XXIII. 
SILURIAN SPECIES. 
1—9. Rhynchonella Wilsoni, Sow. 1. Upper Ludlow; 8. W. of Hazle, Woolhope. 2. After Sowerby’s 
11—14. 
18. 
9) 
figure in ‘ Siluria:’ Aymestry Limestone ; Aymestry. 3, 4. Internal east from 
the Aymestry Limestone; Sedgley. 5, 6, 7. Two large specimens from 
Wenlock Limestone; Dudley. 8. Variety (Lerebratula crebricosta, Sow.) ; 
from the original specimen; Tynewydd, Llandovery. 9. Variety (Tere- 
bratula pentagona, Sow.); from the original specimen; Upper Ludlow; 
Delbury, Shropshire. 
95 var. spheroidalis, M‘Coy. After the figure in ‘ Brit. Pal. Foss.,’ pl. i 1, 
fig. 4. 
s var. Davidsoni, M‘Coy. A series of specimens from the Wenlock Limestone 
of Dudley. 
5»!  Anomia lacunosa, Linné. From the figures in the ‘ Muszeum Tessinianum.’ 
»’ <A figure taken from Grew’s work; referred by Linnzeus to his dnomia 
lacunosa. 
»? A figure taken from Martin Lister’s ‘ Historia Animalium ;’ likewise referred 
by Linneeus to his 4, /acunosa. 
These figures are here introduced to show how difficult it is to feel 
certain what was the type form considered by Linne as his 4. lacunosa. 
= Dalman’s figure of his Anomia lacunosa. 
19. Rhynchonella nasutu, M‘Coy. From the original specimen in the Woodwardian Museum, Cambridge. 
20—24. 
25—28. 
2) 
2? 
Caradoc; Craigh Head Quarry, Girvan, Ayrshire. 
decemplicata, Sow. 20. May Hill Sandstone; Eastnor Obelisk, Eastnor Park; Dr. Holl’s 
Collection. 21. May Hill Sandstone; Eastnor; Museum Pract. Geol. 23. 
After Sowerby’s original figures, Llandovery rock; Malvern. 24. Bala 
Beds ; Allt-y-gader, Llanfyllin, North Wales. 
Lewisii, Day. From the Wenlock Limestone of Dudley. 
