210 



obtained, most of them in an excellent state of preservation. An exact record 

 was kept of the layer from which each specimen came, thereby rendering the 

 material of the utmost value for the study of variation. 



This section ( B) is as follows (^ 1.38 B) : 



Ft. In. 



60 — Heavy compact limestone. Few fossils 27 



59 — Shaly limestone with Plalistrophia lynx. Hebertelia, MontcuUpora, 



etc., P. (aticosta toward the top 49 



58 — Shaly limestone. Hebertelia (aa) some Tlcttystrcphia and Bajines- 



(juina 10 8 



57 — Shaly limestone. Rafinesquina and Hebertelia 2 



56 — Thin argillaceous limestone 16 



55 — Limestone. Base of Platystrophia zone S 



54 — Limestone 3 



53 — Limestone. Rnfinesquina 2 10 



52 — Limestone with Zyc/oKpira 5 



51— Limestone with Puijinesquina 6 4 



50 — Very coarsely crystalline gray white-spotted limestone 6 



49 — Sandstone 1 



48 — Crinoidal limestone with fragments of Piof. (aa) 4 



47— Covered 7 



46 — Mostly limestone with Pofinesquina 5 4 



45 — Fine grained limestone with Rafinesquina 2 



44 — Covered 2 4 



43 — Limestone with Bryozoa (aa) 3 



42 — Limestone with Rafinesquina 5 



41— Covered 1 10 



40 — Ranne^quina. Bryozoa 8 



39— Covered 17 



38 — Thin layer of light colored limestone with Rafnesquina (shells 



weathering red) 1 3 



37— Covered 2 4 



36— Same as 35 1 



35 — 'Limestone with Dalmaneila (asi). Bryozoa (aa) iZa/Tjes^mna (frag- 

 ments) 4 



34 — Limestone. Soft, gray. Dalmanella (aaa) 1 6 



33 — Covered : some exposed shale and limestone 12 



32 — Thin limestones 1 8 



31 — Coarsely crystalline light gray limestone containing Dalmanella 



and Bryozoa 8 



30— Covered 5 6 



29 — Compact limestone. Dalmanella and Bryozoa 1 



28— Shale 4 



27 — Limestone 4 



26-Shale 7 



