PLATE XX. 



All the figures in the Flute are from specimens from Lummaton in my Collection 



except where otherwise stated. 



Isotrtpa ? Gregorii, n. sp. (Page 181 .) 

 Fig. 



1. Small specimen, showing the external surface and the general conical form. 



2. Portion of another specimen, showing the internal surface and the indistinct 



cast of the exterior. 2 a, section of another part of the same specimen, 

 taken across the branches, showing its conical form and the relation 

 between the cell-branches and the guard, X 5. 2 b, a portion of the same, 

 X 10, showing the arrangement of the cells, the expanding pillars, and the 

 cellular tissue. 2 c, section of another portion taken along the branch, 

 showing apparently the bulging sides of the cell-chambers and the thickened 

 expanding guard of the external side. 2 d, an oblique transverse section 

 showing the keels and the tissue. 2 e, a portion of the same section, X 25, 

 showing the supplementary cells on the keel. 



Fenestella, sp. (Page 172.) 



3. A small fusiform specimen, X 2. 3 a, portiou enlarged, showing the cells 



opening on the external side, and about four cells to a fenestrule. 

 Lummaton. Woodwardian Museum. 



Diplopora pristina, n. sp. (Page 182.) 



4. A fragmentary branch having six cells on one side without any signs of 



dissepiments, X 20. 



Septopora, sp. (Page 183.) 



5. Specimen showing the inequality of the branches. 5 a, portion, X 10, with 



worn surface. Torquay Museum. 



Ptilopora ? sp. (Page 184.) 



6. A specimen in which the lateral branches are almost destroyed, X 5. 



Lummaton. Champernowne Collection. 



Penniretipora ? sp. (Page 185.) 



7. Specimen with apparently free lateral branches, X 5. 7 a, upper branch, X 20, 



to show the longitudinal striation. Lummaton. Woodwardian Museum. 



8. Specimen, X 5, showing the setting of the subsidiary branches. 8 a, portion 



of the same, X 10, showing the arrangement of the cells. 



10. Another specimen, X 5. 10 a, a portion of the same, X 10, showing the 



minute ornament. 



Ramipora, sp. (Page 187.) 

 !). Transparent section of a specimen showing the main and subsidiary branches, 

 X 5. 9 a, portion of the same section, X 10, showing the shape and 

 arrangement of the cells. 



11. Specimen showing the major and minor branches, X 2. Lummaton. 



Torquay Museum. 



Batostomella oomorpha, n. sp. (Page 188.) 



12. Natural section of a specimen, X 5. 12 a, the same, X 10, showing the cells. 

 L3. Transparent section, X 10. 13a, a portion of the same, X 20, showing the 



opores, but not the acanthopores which are visible in other parts of 

 the specimen. 



