] Millimetres. 

 Length = 13 



ALBIAN FOSSILS DISCOVERED AT OKEFORD FITZPAINE. 97 



distant curved costae, having papillated edges ; costse attenuated at 

 both extremities, the area between each being finely striated ; the 

 area is moderately wide and covered with numerous delicate 

 papillated costse, which descend in a slight curve from the 

 keel. 



Dimensions Height = 12 V 



The species is mainly distinguished by the beaded structure on 

 the summits of the ribs. 



RANGE OF SPECIES. Albian. 



LOCALITIES. Folkestone ; Aube, Yonne, and other districts of 

 France. 



TEREDO, sp. 



The specimen referred to this genus consists of a lengthened 

 tube, slightly curved, showing a nearly uniform diameter in its 

 central region, and afterwards becoming attenuated at one 

 extremity. The other end is short and narrow, bending outwards 

 or contrary to the general curvature of the shell. No test characters 

 can be traced as the surface is much perished. In my first paper 

 I regarded this fossil as an Annelid tube under the name of 

 Serpula antiquata, but I have since considered it may more 

 correctly be assigned to the genus Teredo, though its bad preserva- 

 tion renders this even a doubtful identification. 



Dimensions Length = ll(h 



... .. ! Millimetres. 



Max. diameter = 7J 



PLANTS. 



The specimen of " Coniferous Wood," alluded to in my former 

 list, represents a somewhat rolled fragment of wood heavily charged 

 with pyrites, and so black and dense that all attempts have failed 

 to secure a satisfactory microscopic section. With an ordinary 

 platyscopic lens, and when viewed transversely, a fine radial 

 structure can be detected, together with the annulations of growth. 

 Coniferous remains are common to most of the formations, and 

 date back to Palaeozoic times. 



