The Utica Terrane in Canada. 179 
precise Geological horizon of Siphonotreta Scotica, Davidson.” 
I had occasion to note the exact band from which this in- 
teresting fossil came and gave a list of sixteen other species 
which were found associated therewith. Since then I have 
had the good fortune to obtain additional forms, associated 
with which is the TYurrilepas Canadensis, Woodward— 
described by Dr. Henry Woodward in the “ Geol. Mag. 
No. 300, Dec. 3,” vol. vi. p. 271 (1889.) 
The following is a list of the species occurring in the 
‘Siphonotreta band” along the bank of the Rideau River, 
opposite the Rifle Range, Ottawa :— 
1. Batostomella erratica, Ulrieh. 
2. Lingua curta, Hall. 
3: ** elongata, Hall. 
4 “«  quadrata, Eichwald. 
(? = L. Cincinnatiensis, Hall and Whitfield.) 
5. Leptena sericea, Sowerby. 
6. Strophomena alternata, Conrad. 
7. Orthis testudinaria, Dalman. 
8. Zygospira Headi, Billings. 
ie rae AV LE: 
10. ig modesta, Say. 
11. Conularia Trentonensis, Hall. 
12. Leperditia cylindrica, Hall. 
13. Beyrichia oculifera, Hall. 
14. Asaphus Canadensis, Hall. 
15. “ platycephalus, Stone. 
vel. A. megistos, Locke. 
16. Calymene senaria, Conrad. 
The above sixteen species all occur in the one band, from 
nine inches to one foot in thickness, associated with (17) 
Siphonotreta Scotica, Davidson, and (18) Turrilepas Cana- 
densis, Woodward. 
The Lingule are eminently characteristic, especially 
Lingula Progne and L. curta, the former of which is abund- 
ant almost everywhere the Utica shales holding Asaphus 
Canadensis occur. 
The monticuliporide and Bryozoa generally have 
afforded but little material as yet. Batostomella erratica, 
Ulrich, has been recognized and identified by Prof. E. O. 
