PLATE XXVI. 



Jurense-zone (Striatulum-beds). 

 Figs. 1, 2. — Haugia Eseri (Oppel). 



Fig. 1. — Side view of a form with coarse ribs in the umbilicus, which rather 

 suddenly give place to entire smoothness. The testis very well preserved. North 

 Nibley, Grloucestershire. My Collection. (Page 155.) 



Fig. 2. — View of the aperture of the same specimen. 



Figs. 3 — 5. — Haugia illustris (Denckmann) . 



Fig. 3. — Side view of a poorly preserved, in fact slightly crushed, example, 

 but showing the general contour. Penn Wood, near Stroud, Gloucestershire. 

 My Collection. (Page 153.) 



Fig. 4. — Side view of a fragment of another example in a better state of 

 preservation to show the ornamentation, Coaley Wood, probably Bed No. 8. 

 My Collection. 



Fig. 5. — A sectional view of the same example to show its proportions. 



Variabilis -subzone. • 

 Fig. 6. — Haugia jugosa (Sowerby). 



Fig. 6. — Outline of the mouth-border, taken from a rather poor specimen 

 obtained in the Cotteswold Sands, Coaley Wood. My Collection. (Page 149.) 



Jurense-zone (Striatulum-beds). 



Figs. 7 — 10. — GrEAMMOCEEAS STEIATULUM {Sowerblj). 



Fig. 7. — Side view of Sowerby's original example contained in the Collection 

 of the British Museum (Natural History). This specimen was " found embedded 

 in a marly Limestone nodule .... on the coast in Robin Hood's Bay by 

 Mr. Crawford, of Scarborough." ' Min. Conch.,' vol. v, pi. ccccxxi, p. 23. 

 (Page 173.) 



Fig. 8. — Front view of the same example. 



Fig. 9. — Copy of a rubbing from the surface of the whorl to show the correct 

 bend of the ribbing, a characteristic feature in Grammoceras (see page 162.) 



Fig. 10. — Tracing of the suture-line. The designs for this and for fig. 9 were 

 kindly prepared for me by Mr. G. C. Crick, F.G.S. 



