﻿Yol. 66. ,] LIMESTONE SOUTH OF THE CRAVEN FAULT. 583 



Imperfect traces of septa are seen in all the ' species,' but again 

 they are best observed in the regularly developed larger reticulate 

 forms (PL XLI) and in S. distans. They are not easily made out 

 in coralla of the ramulose type. 



The ' species ' which I should be prepared to recognize from my 

 acquaintance with the abundant material available in Craven are : — 



(1) S. reticulata, G-oldf. (2) 8. geniculata, Phillips. 



(3) 8. ramulosa, Goldf. (4) S. distans (Fischer). 



(5) 8. gigantea, Thomson. 



The first-named three seem to be more closely related to each 

 other than they are to the others. 



Under S. reticulata, Goldf., I should include also Harmodites 

 parallelus, Fisch., and Tubiporites catenata, Mart. 



Under S. ramulosa, Goldf., I should include also H. stolonifer, 

 Fisch. (pars), H. ramosus, Fisch., and S. laxa, Phill. (pars). 



Under S. distans (Fischer) I should include also S. ramulosa, 

 Phill. (pars), and S. ramulosa, De Kon. (pars). 



EXPLANATION OF PLATES XXXVIII-XLI. 



Plate XXXYIII. 



[All the figures are of the natural size.] 



Figs. 1-4. Zaphrentis amplexoides, sp. nov. Serial transverse sections of one 

 specimen ; showing irregular septal development and occasional 

 irregular dissepiments. (See p. 569.) 

 5-7. Serial transverse sections of another specimen, with regular septa 

 and fewer dissepiments. 

 Fig. 8. Longitudinal section, taken through the middle cylindrical part of an 

 average specimen. 

 9. Transverse section of a larger specimen, taken just below the calyx. 

 All from Rylstone Railway Quarry. 

 Figs. 10 & 11. Zaphrentis, sp. nov., transverse sections. Fig. 11 cuts the lower 

 part of the calyx. Rylstone Railway Q.uarry. (See p. 572.) 



Plate XXXIX. 

 [All the figures are of the natural size.] 

 Figs. 1 & 2. Caninia cf. subibicina, M'Ooy. Swinden Quarry. Transverse and 



longitudinal sections. (See p. 568.) 

 Fig. 3. Caninia cf. subibicina, M'Coy. Elbolton. Transverse section. 

 Figs. 4 & 5. Caninia gigantea, Mich. Swinden Gill Head. Transverse and 



longitudinal sections. (See p. 567.) 

 Fig. 6. Caninia hettonends, sp. nov. Owslin Barn, Hetton. Transverse 

 section. (See p. 567.) 

 7. Caninia gigantea, Mich. Warrel Quarry, Coniston Cold. Transverse 

 section of an average specimen. 



Plate XL. 



[All the figures are of the natural size.] 



Figs. 1 & 2. Lophophyllum cost at um (M'Coy). Rylstone Railway Quarry. 



Transverse sections of the same specimen. (See p. 573.) 

 Fig. 3. Lophophyllum costatum. Transverse section of another specimen. 



4. Do. do. Longitudinal section of another specimen. 



5. Lophophyllum aff. retiforme, Nich. & Thorns. Rylstone Railway Quarry. 



Transverse section. 



