Geological Sucietij. ^'^'S 



the centre of this range presents the appearance either ot"^ an included 

 bed or of a great dyke which throws off the strata on either side. 1 he 

 fossils of Coregna collected by the author (first noticed by Guidoni) 



""^ Orthoceras : -A species resembling O. elongatum of the lias, and 

 also O. Steinhaeri of the coal measures. 



Belemnites (many alveoli of) . . , , . f ♦! 



Ammonites :-15 species, one of which is the A. erugatus of the 

 Yorkshire lias (Phillips's Geol. of Yorkshire); and another resembles 

 A Bucklandi : whilst two are fossils of the coal-measures, viz. A Lis- 

 teri and A. biformis. The remainder are undescnoed, but have been 

 drawn bv Mr. J. Sowerby to illustrate this memoir. From the nature 

 of these organic remains, and principally from the presence of be- 

 lemnites, the author, whilst admitting the conflicting nature of the 

 evidence, similar to that observed in parts of the Alps described by 

 M Elie de Beaumont, inclines to the belief that this range of lime- 

 stone, &c. is equivalent to the lias or some member of the oo itic series. 

 4 Brown shale and variegated beds are seen beneath the gray 

 limestone ; and again, below the variegated strata, there is a consider- 

 able developement of brown sandstone and gray schist, which consti- 

 tutes a high range extending from La Castellana tobeyond \ ernazza, 

 wherein a large Fucus is found. This gray schist at Monte Rosso seems 

 to have been penetrated by diallage and serpentine rocks. 



Saccharine limeslnnc, ^c. of Capo Cor^o.-fhe coast section of 

 Capo Corvo exhibits thick and thin beds of gray limestone alternat- 

 in/with schists ; athick.bedded fine conglomerate which passes into 

 chlorite and micaceous schists ; and saccharine limestone of various 

 colours with mica schist ; the whole in highly inc ined and contorted 

 positions. Similar rocks occur between the mouth of the Magra and 

 Ameglia, where thev are covered by the gray limestone, and con tarn 

 a subordinate conglomerate very much resembling that of the Valoi- 

 sine. The author is disposed to refer this group to the same age as the 

 older conglomerates which occur between the high Alps and their cal- 

 careous zones on the side of Italy. r i * r „„^\.o 

 Carrara Marfc/es.-These seem to form part of the system o gneiss 

 and mica schist of the adjoining Alpi Appuan., being distinct y stra- 

 tified and underlying the gray limestone, resembling that of I orto 



^Tneiss and mica schist are well exposed in the valley of the Fri- 



eido near Ma.ssa. ,.,, ,. , 



Unstrafificd Rocks : DioUage Rock and Ser,miUne.-L he author ob- 

 served no traces of stratification in these rocks throughout Southern 

 Liguria, and he coincides with the views of those who consider them 

 to^have had an igneous origin. In the Valley of Cvavignola serpen- 

 tine and diallage rock traverse gray Iiniestonc and schist and m one 

 part are in contact with jasper rock, which as is "«^'7;<V'y ."^^ mZ' 

 eniart, rests upon contorted limestone and schist. Bevvecn Monte 

 Rosso and Vernazza the schists arc. much disturbed and near 

 Cai>o Mesco, and again at Levanto, diallage rock and serpcntme 

 N. S. Vol 7. No. 38. Feb. 1 830. D P'^'^'ng 



