. Bulletin of the Geological Society of America. Geology. BALTIC REGION 599 in Gralicia and elsewhere. In Sweden it occurs in the Lower Chasmops limestone of Dalecarlia. Another species of Orthis confined to B III a is Orthis callactis Dalman, which occurs in the Asaphus limestone of Dalecarlia. Lycoplioria micella Dalm. is another species appearing here for the first time and ranging through B III, and so is Strophomena jentschi Gay, important as characterizing the Asaphus limestones of (Eland and the boulders of limestone conglomerate to he referred to later. The second member of the Asaphus
. Bulletin of the Geological Society of America. Geology. BALTIC REGION 599 in Gralicia and elsewhere. In Sweden it occurs in the Lower Chasmops limestone of Dalecarlia. Another species of Orthis confined to B III a is Orthis callactis Dalman, which occurs in the Asaphus limestone of Dalecarlia. Lycoplioria micella Dalm. is another species appearing here for the first time and ranging through B III, and so is Strophomena jentschi Gay, important as characterizing the Asaphus limestones of (Eland and the boulders of limestone conglomerate to he referred to later. The second member of the Asaphus limestone, B III /?, is a mottled yellowish to reddish limestone, with a thickness of about meters. The fauna is not markedly distinct from that of B III a, but is especially characterized by Asaphus raniceps Dalm. Four species of Megalaspis occur here, including M. aculicaiida, which also occurs in B III a, and has a related form in B II y. Megalaspis heros Dalm. also occurs here, and Asaphus expansus Dalm. is continued upward from B III a. The W E. Figure 5.—Diagram illustrating the westward, Increase of the Hiatus between Divisions B II and B III in Esthonia (Modified after Lamansky) horizon carries a thin layer of lenticles of brown iron oxide (Untere Lin- senschicht) a short distance above the base, in which, according to Ray- mond, Piiomera fischeri and Lycoplioria micella are especially The upper division, B III y, is a heavy bedded limestone, about 6 me- ters thick, and is especially characterized by Asaphus eichwaldi F. S. and Ptychopyge (Pseudasaphus) globifrons Eichw. This fauna differs more from the preceding two than do their faunas among themselves. Several of the trilobites, however, as well as a number of brachiopods, are common to all these divisions. The most marked character of this division is, however, the appearance of numerous Oephalopods of the genera Endo- ceras, Vaginoceras, Planctoceras, Estonioceras, and Cyrtoceras. The gas- tropod
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