﻿PLATE XXXVIII. 



Jurense-zone (Dumortieria-beds) . 

 Figs. 1 — 8. — Hudlestonia affinis (Seebach). 



Fig. 1. — This figure, from the end to about the top part of fig. 4, is an outline 

 taken from a large, very rough fragment. (The circumference beyond this point, 

 and the centre-lines have been filled in to convey an idea of the complete 

 Ammonite.) Penn Wood, near Stroud. My Collection. (Page 228.) 



Fig. 2. — Outline of the aperture of the large end. 



Fig. 3. — Outline at the small end. On account of the wretched preserva- 

 tion of the specimen these outlines are only approximately exact, especially 

 ventrally. 



Fig. 4. — Side \iew of a fragment, showing the smooth outer whorl, and the 

 ribbed inner whorls attached to it, but apparently not in correct position. This 

 fragment has been so placed on the plate to give an idea of the whorl of fig. 1. 

 " The Yellow and Grey Sands below Dogger, Blue Wyke," Yorkshire. In the 

 Collection of Mr. W. H. Hudleston, F.R.S., &c. 



Fig. 5. — Front view of the inner whorls of fig. 4. 



Fig. 6. — Aperture of the outer whorl of fig. 4. 



Fig. 7. — Side view of another specimen. " Grey Sands, Blue Wyke," York- 

 shire. In the Collection of Mr. W. H. Hudleston, F.R.S. 



Fig. 8. — Back view of the same. (Figs. 7 and 8 have been restored by the 

 artist to the best of his ability at my desire, so as to give an idea of the specimen 

 as it should be. The original is distorted, broken, and poorly preserved.) 



Figs. 9 — 12. — Hudlestonia sereodens (Quenstedt). 



Fig. 9. — Outline of the side view of a poorly-preserved specimen. Penn 

 Wood, near Stroud. My Collection. (Page 229.) 



Fig. 10. — Aperture of the same. 



Fig. 11. — Aperture of another specimen. Cam Down, near Dursley. My 

 Collection. 



Fig. 12. — Suture-line of the same. 



Figs. 13 — 16. — Hudlestonia Sinon (Bayle). 



Fig. 13. — Side view of a fragmentary and poorly-preserved example. " Grey 

 Sands, Blue Wyke," Yorkshire. In the Collection of Mr. W. H. Hudleston, 

 F.R.S. (Page 227.) 



Fig. 14. — Portion of ventral area of the same. 



Fig. 15. — Aperture of the same as nearly as it can be determined. 



Fig. 16. — Suture-line of the same. 



