PLATE XXIX. 



Jurense-zone (Dispansum-beds). 

 Figs. 1 — 10. — Geammoobras doerntense (Denckmann). 



Fig. 1. — Side view of a characteristic specimen, showing the irregular ribbing. 

 The test is only partly preserved. Coaley Wood. My Collection, (Page 182.) 



Fig. 2. — Front view of the same specimen. 



Fig. 3. — Suture-line of the same specimen. 



Fig. 4. — Side view of a smaller specimen, showing ribs rather strongly bent on 

 the lateral area. Most of the test is nicely preserved. Coaley Wood. My 

 Collection. 



Fig. 5. — Front view of the same specimen. 



Fig. 6. — Side view of a smaller specimen. From marly limestone below the 

 Yeovil Sands, South Petherton, Somerset. My Collection. 



Fig. 7. — Back view of the same specimen. 



Fig. 8. — Side view of a fine specimen, a variety representing a more advanced 

 stage of the development of this species wherein the irregular ribs have disappeared, 

 and the other ribs have become finer generally, and on the body-chamber are 

 merely strise ; the ventral area is also more acute, and the carina not so distinct. 

 This specimen has its test almost complete, and shows a portion of the lateral part 

 of the mouth. For a smaller specimen of this form see Plate XXXIII, figs. 11, 12. 

 Coaley Wood. My Collection. 



Fig. 9. — Front view of the same specimen. 



Fig. 10. — Back view of the same specimen, showing the manner in which the 

 radii cross the ventral area and carina, indicating the shape of the ventral appen- 

 dage of the mouth. 



