twenhofel: expedition to the Baltic provinces. 333 



to six inches thick) with thin shale partings. Few fossils appear to 

 be present. The second quarry is situated on the side of a hill at an 

 elevation of about fifteen feet above the shore quarry. The rocks 

 consist of gray crystalline limestones interstratified with gray cal- 

 careous shales. Only about three feet are shown. A single limestone 

 bed near the base has the Caudigalli effect on its upper surface, and 

 this same surface has many beautifully preserved Schuchertclla peden 

 and Rhipidomella hybrida, of which a great many are single valves 

 showing excellent interiors. Numerous fragments of Calymene 

 spectabilis Angelin are also present. The other limestone beds contain 

 many corals and crinoid stems like those of Moritz. 



About a mile farther eastward, at about the same elevation and 

 presumably about the same horizon, is a large quarry which has 

 recently been reopened. About five feet of strata are exposed, con- 

 sisting of very fossiliferous gray crystalline limestones, and thin cal- 

 careous gray shales. Some of the shale bands are filled with small 

 Spirifers and Rhynchonellas, while the limestone beds are thickly 

 crowded with large Crotallocrinus stems. The old dump heaps afford 

 splendid collecting. Common fossils of the beds of this quarry are: — 



1. Clathrodictyon sp. 



2. Favosites gothlandicus. 



3. Spongophyllum contortiseptum Dybowski. 



4. Hallopora elegantula. 



5. Monticulipora fletcheri Milne Edwards and Haime. 



6. Ptilodictya lanceolata Hisinger. 



7. flexa Hisinger. 



8. Chonetes striatellus Dalman. 



9. Orthis canaliculata Lindstrom. 



10. Homeospira salteri (Davidson). 



11. Spirifer elevatus Hisinger. 



12. Tentaculites curvatus Boll. 



13. inaequalis Eichwald. 



14. Calymene spectabilis Angelin. 



The Nessoma quarries are just above sea-level, and cover several 

 acres. The strata consist of thick-bedded black to dark gray mottled 

 limestone w4th thin shale .partings. Not more than five feet are ex- 

 posed. Some of the beds of limestone are fully a foot thick, and 

 afford excellent dimensional stone. The quarries are being actively 

 developed, and at the time of my visit about a score of men were em- 

 ployed, the stone being shipped to Riga, Pernau, Hapsal, Arensberg, 



