Silurian Fossils. 41 



Fig. 12 — Rhipidomdla magnicardinalis, sp. nov. Casts of inter- 

 iors : A, pedicel valve. B, brachial valve. At the spring on Big Salt 

 Lick creek, in Lewis county, Kentucky, in the West Union bed. 



Fig. 13 — Schuchertclla conferta, sp. nov. Casts of interiors: A. 

 brachial valve. B, pedicel valve. Martins, Kentucky, in the West 

 Union bed. 



Fig. 14 — Spirifer eudora, Hall. Casts of interiors: A, pedicel 

 valve. B, brachial valve. In the quarry in the southeastern part of 

 West Union, Ohio, in the West Union bed. 



Fig. 15 — Farositcs pyriformc-kokomocnsis, var. nov. In the 

 upper part of the George W. Defenbaugh quarry, southeast of Koko- 

 mo, Indiana. 



Fig. 16 — Aniplcxiis scptatus, sp. nov. Lateral views. B, weather- 

 ed so as to show the tabul?e. At the top of the old George W. Defen- 

 baugh quarry, southeast of Kokomo, Indiana. 



Fig. 17 — Pcntamcrus divergens, sp. nov. A, pedicel valve. B, 

 brachial valve, contorted by compression. In the upper part of the 

 old George W. Defenbaugh quarry, in the southeastern part of Koko- 

 mo, Indiana. 



Fig. 18 — Strophcodonta mimdula, sp. nov. Interior of brachial 

 valve. In the upper part of the Alger clay division of the Crab Or- 

 chard formation, between Poplar Flats and Martin's store, in Lewis 

 county, Kentucky. 



Fig. 19 — Homolaiwtus cf. dclphinocephalus, Green. A, pygidium. 

 with only the central part well preserved. B, glabella. C. pygidium, 

 with only the central part well preserved, but the axial lobe merges 

 posteriorly into the wide flattened border. Martins, Kentucky, in the 

 West LTnion bed. 



Fig. 20— 'Dalmanites limnluriis-hrevicaudatus, var. nov. Pygidia. 

 Martins, Lewis county, Kentucky, in the West Union bed. 



41 



