10 G. LINDSTHOM, ON THE SILL'KIAN GASTROPODA AND TTEROPODA OF GOTLAND. 



of all orders. It is interrupted by the ])eculiar »calcareous shale» (kulkstensskiffer 

 Hisinger) which, intermingled with sandy slates, occupies the shore around Skiiret and 

 contains a great number of curious tracks, besides fossils of a fauna distinct from that 

 of the neighbouring shores. 



Hahhlinqho. Along the fiat shore of Petesvik a hard, l)lue shale, containins 

 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 about 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 may be remarked the interesting Rhizoijhylhim Gntlandicum. In the same 

 parish of Fardhem there is an extensive canal cut through a moorland, Wisne 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 Downingia?, 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 the 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 Ostergarn, the initial colony of Labechia or a 

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



Bursvik and Hoburg. The sandstone witli 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. 



Rone. Sandstone and shale along the shore. 



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

 didyma. 



Slite. The lowest shale beds alon^ the shore. 



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

 shores of Kapellshamn. 



Stratum b. 



Wishy. The limestone with interstratitied shale in the neighbourhood of the town, 

 well developed at Sniickgardet, Skalso, Wibble (jvarn, Hogklint 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. 



Lansa on Faro. 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 canal leading from Stor myr is cut through strata of this group. 



