372 



TUE GEOLOGIST. 



I have described saccharine and finer-grained quartzites in this re- 

 lation. I have now to mention that at E-odos, sixty miles from 



the mouth of the Orange Kiver, 

 ^•777^ strata of limestone rest in ex- 



i ' / / !%>-. tensive masses on the mountains, 



I ^^'as told, horizontally ; while 

 l!ll!nl/l/j)'!!llr**m^^ below, only a comparatively few 



a h c h a Id beds of saccharine and other va- 



Pig. 3._Sectiontliroiigli Klein Poorden Pool I. rieties of crystalline limestone 

 (Pinchin and Piubidge.) _ wei'e interstratitied with the 



aa, quartzite; hhh, slate; c, porphyiy (Bain); gneiss. 



d, porphyry. j hardly have thought 



it necessary to contest tlie igneous origin of marble at the present 

 day, had I not seen in your Magazine the account of a recent experi- 

 ment. 



SOME ACCOUNT OF BAEEETTIA, A NEW AND EE- 

 MAEKABLE FOSSIL SHELL FEOM THE HIPPUEITE 

 LIMESTONE OF JAMAICA. 



By S. p. Woodwaed, F.G.S. 



The fossil represented in the accompanying figures is one of that 

 kind whose discovery severely tests the faith of the naturalist in his 

 previous conclusions, and may appear to raise a suspicion not only 

 respecting the sufliciency of his data, but even as to the correctness 

 of his method of investigation. Almost any person, at first sight of 

 the specimen, would think he was looking at a coral^ and it would 

 seem like an attempt to impose on one's credulity to say it was a 

 bivalve shell, like an oyster or a clam.* 



Yet there is no doubt it is a kind of Hippurite, although the rays 

 give it a novel and extraordinary character. The discoverer had quite 

 satisfied himself on this point before he brought it to England and 

 placed it in our hands. It was found last year (January, 1861), by 

 Mr. Lucas Barrett, F.G-.S., Director of the Geological Survey of the 

 British A\^est Indies, in the parish of Portland, in the north-east of 



* This is not the only case of the sort. The gcnns Gonioj^thyllum, one of the " Zo- 

 antliaria ru2,osa," established by jNlihie-Edwards, is apparently identical with CalceoJa, 

 tbc well-known bivalve fossil of the Eitel, placed by Lamarck with the " Rudistes," and 

 adinittcd as a Braehiopod, with a sitrn of donbt, by Mr. Davidson and myself. Gonio- 

 ji/il/llinii piirahihlalc is a scarce fossil of the Upper Silurian at Dudley and Malvern, but 

 not unconinion in the Baltic island of Gothland. It was described as a Cnhi'ola by 

 Girard in 1842. Another s])ecies, which is so like Cnlceola saadaJbia that Murchison 

 and Vcrncuil assumed the existence of Devonian strata iu Gothland, on the strength of 

 its occurrence, has small rootlets of attachment along the borders of its "hinge-area," 

 and a vesicular interior, like Cifstiphiillum. After carefully examining a series of exam- 

 ples belonging to M. Lindstroni, of ^Visby, we can only say" that they are probably 

 Bracliiopoda nor Zuantharia, although very like each iu some respects. 



