RAYMOND: CORREL.VTIOX OF THE ORDOVICL^X STRATA. 199 



was able to find the formation in another small, shallow, old quarry 

 at Wannamois, and in a small ditch at Tolks. The strata here consist 

 of thin-bedded (layers two to four inches thick) gray and almost white 

 limestone, rough to the touch, full of silica, and with silicified fossils. 

 The fossils included Echinosphaeritcs aurantium, which species we also 

 found in the lower layers of strata assigned to the next formation, the 

 Jewe, at the quarry south of the Guthof at Kuckers, and at Aluver, 

 north of Wesenberg. As this species does not occur in the tj^jical 

 Jewe, I propose to extend the Itfer to include all the strata at the above 

 localities which contain Echinosphaeritcs. These strata lack the 

 shale of the Kuckers member and are lithologically unlike the Jewe, 

 as they weather to a gra\-ish white instead of a rusty yellow. 



The geographical distribution of the Itfer is unknown. It is 

 difficult to trace, as it has few fossils peculiar to it, and no very dis- 

 tinctive lithological characteristics. It has not been identified outside 

 the vicinity of the typical locality, but Baron Toll called our attention 

 to an outcrop of strata on his estate which were stratigraphically a 

 few feet above the typical Kuckers in the " Graben," and which may 

 prove to be Itfer. They consisted of a thin-bedded soft, earthy, gray 

 limestone, and contained too few fossils to permit of positive identifi- 

 cation of age. 



Schmidt estimated the thickness of the Itfer at twenty to thirty feet. 



Jewe formation. Di (Jewesche schicht, except for the basal portion), 

 of Schmidt, but not including the Kegel and Wassalem. 



The Jewe is a formation with distinct lithological characteristics, 

 contains a well-marked and easily recognized fauna, and is well ex- 

 posed along a line extending from Gatschina in the Government of 

 Petrograd to the coast near Spitham in the northwestern corner of 

 Esthonia. 



At the type-locality, Jewe, in an abandoned quarry south of the 

 railroad there is an exposure of about twelve feet of light gray to 

 yellow magnesian limestone of earthy texture. Some layers are more 

 shaly than others and weathering brings this out strongly. Still 

 higher strata of the same formation are to be seen a mile to the south- 

 west on the Gut Eichenheim, where, in similar strata, fossils are some- 

 what more plentiful. 



A much better exposure of the Jewe is that at Ahn^er on the rail- 

 road to Kunda, three miles northeast of Wesenberg. Here about 

 twenty-five feet of the Jewe are shown in a quarry, with the upper part 

 of the Itfer, full of Echinosphaeritcs, exposed at the lower part. The 

 rock is a fairly compact bluish limestone with earthy texture; on 



