10 G. LINDSTRÖM, ON THE SILUEIAN GASTROPODA AND PTEEOPODA OF GOTLAND. 



of all orders. It is interrupted b)" the peculiar »calcareous shale» (kalkstensskiffer 

 Hisingee) which, intermingled with sandy slates, occupies the shore around Skäret and 

 contains a great nuniber of curious tracks, besides fossils of a fauna distinct fi^om that 

 of the neighbouring shores. 



Habhlingho. Along the flat shore of Petesvik a härd, blue shale, containing 

 more limestone than those in north, is spread out, filled with Brachiopoda and also 

 other shells. The highest point of this shale is further inland aboiit one Swedish 

 mile, 80 feet above the sea. 



Fardhem. A section of micaceous shale is seen near a saw mill at Burge 

 with fossils partly characteristic of Djupvik and partly of Habblingbo. Amongst the 

 latter raay be remarked the interesting Rhizophyllum Gotlandicinn. In the same 

 parish of Fardhem there is an extensive cana'1 cut through a moorland, M'isne myr, 

 lying open a fine section of the shale for nearly half a Swedish mile. The fossils it 

 contains are very interesting, as species here meet with each other which were long 

 considered as exclusively characteristic of widely remote localities and thus give addi- 

 tional support to the supposition that all shale beds are coherent and of the same age. 

 Such are Phacops Downingias, also from the sandstone and oolite of S. Gotland and 

 from the limestone bed b of Wisby, Tremanotus longitudinalis also from Wisby a, 

 and the sandstone of Bursvik, Orthis canaliculata formerly from ihe eastern strata of 

 Gotland, Burs etc, Strophom. funiculata, the same variety as in Habblingbo, not Eksta, 

 Chonetes striatella, Pisocrinus ollula found in the shale of Petesvik, Pleurotomaria 

 planorbis His. which is so abundant at Östergarn, the initial colony of Labechia or a 

 kindred coral quite the same as that found on the same level at Slite. 



Bursvik and Hohurg. The sandstone with thin seams of shale or clay, as de- 

 scribed by Hisinger. The fossils are scarce, mostly of the same species as in the 

 oolite above. The few Gastropoda found are well preserved with their shell. 



Bone. Sandstone and shale along the shore. 



Östergarn. Shale beds, on compact limestone, with Chonetes striatella and Atrypa 

 didyma. 



Slite. The lowest shale beds alonar the shore. 



o 



Hallshuk. The lowest beds there and for a while to the south along the west 

 shores of Kaoellshamn. 



Stratum b. 



Wisby. The limestone with interstratified shale in the neighbourhood of the town, 

 Avell developed at Snäckgärdet, Skälsö, Wibble qvarn. Högklint and some localities 

 along the coast northwards to Likkershamn, where also many fossils have been found. 



Westergarn. On the fields farther inland, above the shale, scattered fragments 

 of this stratum can be found. 



Länsa on Fårö. Limestone and shale beds along the shore. 



Slite. The median beds in the sections near the coast. 



Boge. South of Slite in ditches along the road and in the cliffs near Klinte. 



Ruthe. A canul leading from Stor myr is cut through strata of this group. 



