Vol. 52.] BOULDERS FROM THE KOLGUEV BEDS. 61 



(syn. F. Goldfussi). As this species ranges from the Silurian 

 into the Devonian, the age is uncertain. 



(3) * A darkish f ossiliferous limestone. ' The greater part of this is 



made up of Amphipora (Caunopora) ramosa, a Stromatoporid 

 peculiarly Devonian ; ' with it a coral, which may be a Dibuno- 

 phyllum, and probably a piece of Monticulipora. 



(14) * Piece of grey limestone containing Diphyphyllum. 



* Eight smallish specimens, very full of fragmental organic remains, 

 seemingly to some extent etched out by action of water. One 

 specimen, measuring about 2 inches by 1\ inch, contains the 

 spiral arm of a brachiopod (? Spirifera), a crinoid stem, and 

 piece of a lamellibranch. In one of the others we find Pdlypora, 

 with fragments, large and small, of Monticuliporids. Similar 

 organisms occur in the rest, one possibly containing Fenestella, 

 if it be not Polypora. May be Carboniferous in age, possibly 

 older. 



(22) * A fragment, about 1 J inch long and not quite finch wide at 

 the narrower end, of a belemnite, with an excentric alveolus, 

 extending to within i inch of the bottom. [This has since 

 been determined by Mr. G. C. Crick as almost certainly 

 Belemnites subquadratus, a species recorded from the Upper 

 Portlandian of the coast opposite Kolguev Island.] 



The specimens of an olive-grey fine-grained sandy mudstone, with 

 plant-remains, and of lignite, were submitted to A. C. Seward, Esq., 

 M.A., P.G.S., who has kindly furnished the following notes : — 



8 (12) In this specimen, a microscopical examination of the surface 

 reveals the existence of a structure which is probably that of 

 imperfectly silicified coniferous wood. The cavities of the 

 tracheae appear to have been filled with silica, and present the 

 appearance of delicate and regularly- arranged rods ; here and 

 there the series of longitudinally-running rods are crossed by 

 others at right angles, suggesting medullary rays seen in 

 radial view. I am unable to make out any character which 

 will enable me to pronounce a definite opinion as to the geo- 

 logical age of the rock. 



(4) Preservation similar to that in specimen No. 12. Impressions 



of coniferous wood, The irregularly pitted portions are also, 

 I believe, weathered pieces of wood ; a very similar appearance 

 is presented by undoubted specimens of coniferous wood in my 

 possession. 



(5) Fragments of coniferous wood. 



(17) Fragments of carbonized coniferous wood. Sections of a 

 small piece of this wood show fairly well the tracheids and 

 medullary-ray cells characteristic of the Coniferse, but the 

 preservation is not sufficiently good to enable one to offer an 

 opinion as to the precise nature of the plant. 



Lignite (A). — A piece of coniferous wood with distinct annual 

 rings. There appear to be large resin-ducts traversing the 

 spring wood longitudinally. Possibly a more complete exami- 



