﻿PLATE XIX. 



DEVONIAN SPECIES. 



Fig. 



1 . Streptorhynchus umbraculum. Portion of the shell enlarged, to show the numerous concentric lines which 



traverse the interspaces situated between the ribs. 



2- ,, crenistria. Portion of the shell enlarged, to show that the lines which cross the ribs are 



likewise prolonged in the interspaces. 



3 ,, umbraculum 2=0. tenuistriata, Sow. From Moreback, and original specimen in Mus. 



Geol. Soc. 



4, 5. Chonetes sordida, Sow. The original figures from the ' Geol. Trans. Soc.,' 2nd series, vol. v, pi. liii, 



figs. 5 and 16. Lower Devonian, Linton. 



6- „ Hardrensis. Phillips' figures, ' Pal. Foss. of Devon, Cornwall,' &c, pi. lviii, fig. 104.* 



7. ,, „ From one of Phillips' original specimens, Upper Devonian, North Devon. 



This specimen is marked with about 100 ribs. 



°- „ „ Small specimens from the Upper Devonian Grits of Braunton. 



9- „ 2 ~ Leptoena convoluta, Phil. Original figure from ' Pal. Foss. of Devon,' &c, 



pi. xxiv, fig. 96. 



10—12. „ minuta, Goldf. 2 Fig. 10, Middle Devonian, Hope's Nose, near Torquay. Figs. 11, 12, 



Dartington, near Totness. Fig. 11, Collection of Mr. Champernowne. 



13. Strophalosia productoides, Murch. = Lept. caperuta. Sowerby's figure, ' Trans. Geol. Soc.,' vol. v, 



2nd series, pi. liii, fig. 4. Casts in Brown Grits, Upper 

 Devonian, North Devon. 



14. „ ,, Restored specimen from a gutta-percha impression taken from casts in the 



Upper Devonian Grits from Croyde Bay. 



15. ,, „ Perfect example, drawn from the original specimen of P. laxispina, Phil. 



Upper Devonian, Petherwin, Cornwall. Collection of Geol. Survey. 



16. ,, „ Showing the dorsal valve and double area. 



17. ,, 2 „ A specimen from Middle Devonian, East Ogwell. Mus. Geol. Survey 



(labelled St. pustulosa). 



18 — 21. ,, productoides 2 = P. membranacea, Phil. From Middle Devonian of South Petherwin. 



Figs. 18, 19, Collection of Mr. Pengelly. Figs. 20, 21, Mus. Geol. 

 Survey. 



22. Productus preelongus (Leptcena), Sow. Original figures, * Trans. Geol. Soc.,' 2nd series, vol. v, pi. liii, 



fig. 29. Upper Devonian, Croyde Bay, North Devon. 



23 — 25. „ Casts from the Upper Devonian of Croyde Bay, North Devon. Fig. 25, Mus. 



Geol. Survey. 



