74 AST. 
AA. 
AA 28! 
ATA 
AS 
174 A*?. 
FORMATIONS OF ORDOVICIAN AGE. 
15. Lsotelus gigas De Way (Gis 
16. Proetus latimarginatus n. sp. (e)y 
17. Pterygometopus callicephalus (Hall) (£). 
Dark, fossiliferous limestone. 
1. Lingula sp. undet. (Gia) 
2. Rafinesquina alternata (Kmim.) (c)): 
3. Plectambonites sericeus (Sow.) (@)s 
4, Dalmanella testudinaria (Dal.) (c). 
5. Harpina ottawensis (Bill.) - Ge) 
6. Calymene senaria Con. (ae 
Thin-bedded, fossiliferous, micaceous shale. 
1. Plectambonites sericeus (Sow.) (Gaye 
2. Daimanella testudinaria (Dal.) (c). 
3. Plectorthis plicatella (Hall) (Ge) 
Thin-bedded, shaley limestone, with flakes of mica. 
1. Plectambonites sericeus (Sow.) (r). 
2. Dalmanella testudinaria ( Dal.) (eye 
3. Plectorthis plicatella (Hall) (x). 
Dark, fossiliferous limestone, with mica flakes. 
1. Strophomena incurvata (Shep.) (eye 
2. Rafinesquina alternata (Emm.) (ce): 
3. Dalmanella testudinaria (Dal.) (f). 
4. Plectorthis plicatella (Hall) (Ge 
5. Zygospira recurvirostris (Hall) (@)e 
6. Pterygometopus callicephalus (Hall) (f£). 
Soft, decomposed, shaley limestone. 
1. Dalmanella testudinaria (Dal.) (Ge 
2. Plectorthis plicatella (Hall) (Ge))e 
3. Proetus latimarginatus n. sp. (Ge) 
4. Pterygometopus callicephalus (Hall) (7). 
Hard, dark, fossiliferous lmestone. 
1. Hindia parva Ulr. (Ge) 
2. Prasopora sumulatria Ulr. (aye 
3. Lingula sp. undet. G@): 
4. Strophomena incurvata (Shep.) (ey: 
Wiki ora. 
Ibe 2) anak 
Lite 
6 in. 
6 in. 
