336 PROCEEDINGS OF THE GEOLOGICAL SOCIETY. ' [Feb. 26, 



monites Jamesoni, and are the northern prolongation of the Pabba 

 beds. 



It is worthy of note that we have here a lower horizon to start 

 from than in the Portree cliffs opposite. 



This division presents in the cliffs here a great development. The 

 following section was obtained a little to the north of the Hallaig 

 cliffs almost under Dun-Can, where the beds seemed to attain a 

 maximum thickness (the order is descending) : — 



Middle Lias. 



1. Yellow calciferous sandstone with nodules. 



2. Bluish-green calciferous and 



3. Shelly ferruginous sandstone. 



4. Marly sandstone. 



5. Grey marls. 



6. Greenish-yellow sandstone with 



7. Shaly partings. 



8. Yellowish sandstone. 



9. Greenish marly sand beds. 



10. Greenish-yellow calciferous sandstone. 



11. Greenish calciferous sandstone with indurated upper layer. 



The whole section measures about 150 feet from the base of the 

 Inferior Oolite to the sea-level. 



Here No. 1 is the Ammonites-spinatus bed, Nos. 2-8 the A.-mar- 

 garitatus beds, Nos. 9-11 the A.-capricornus bed. The fossils of 

 No. 1 are A. spinatus, Lima Hermanni, Pecten cequivalvis, Oress- 

 lya SeebacJiii, Ostrea cymbium, Avicula novemcostce, Rhynclionella 

 acuta and tetrahedra, Waldheimia resupinata. In Nos. 2-8 in- 

 clusive, A. margaritatus, Isocardia liassica, Pleuromya ?, Pecten 

 cequivalvis, Mytilus scalprum, Ostrea cymbium, Spiriferina rostrata, 

 ffliynehonella tetrahedra. In Nos. 9-11, A. capricomus, Hippo- 

 podium ponderosum, Plicatida spinosa, Ostrea cymbium, var. Mac- 

 cullochii. In No. 10, Mocliola scalprum, Pleuromya ovata, Pinna 

 folium, Plicatida spinosa, Cucullcea Miinsteri, PJioladomya decorata, 

 Pecten cequivalvis. 



No traces were found here of the shales of the Upper Lias ; and 

 the perpendicular form of cliff renders it impossible to get a good 

 section of the Oolites. It was easy to see, however, that both the 

 lower and upper series of the Inferior Oolite and the carbonaceous 

 sandstones were present, but in somewhat greater development than 

 in the Portree cliffs, owing to the great height. In the collection 

 of Raasay fossils made by the late proprietor, Mr. Rainey, is a block 

 of a white granular sandstone, comparable with specimens scattered 

 on the Hallaig shore, containing Ammonites gracilis, Buckman, 

 Tancredia axiniformis, and a smooth Ceritliium. A rock of such a 

 colour can be seen high up in these inaccessible cliffs. The whole 

 extent of the cliff was followed with no better result. The Estuarine 

 beds form the sloping brow between the top of the cliffs and the base 

 of Dun-Can ; basaltic rock then comes on, and forms the whole of 

 this picturesque crown-like hill, the highest point on the island, the 

 elevation being 1443 feet. It is surrounded on all sides by the 



