ECTHEMINIAN FAUNA OF NEWFOUNDLAND. 197 



Plate III. 



Fig. 1. Orthotheca bayonet, n. sp. a The tube, ventral side; — b A 

 tube showing the dorsal side ; both nat. size ; — c Side view 

 of a small example, mag. f ; — d Form of the aperture of 

 the tube ; —e Section toward the small end, both mag. \ ; 

 — /Outline of the distal end of several tubes, to show the 

 taper; mag. f. See p. 193. 



Fig. 2. Urotheca. A small species of the Mt. Stephen fauna, figured, 

 to show the larval tube of the young worm ; mag. \. 

 Seep. 191. 



Fig. 3. Hyolithes excellens, Bill, a Dorsal side of the tube ; — b Side 

 view ; — c Form of the aperture ; — d Section near the small 

 end ; — e Operculum of this species ; —/Outline of side 

 view ; all nat. size ; — g Side view of a young opercule ; 

 — A A still smaller opercule, probably of this species ; 

 — i Side view of same, the three mag. \. See p. 194. 



Fig. 4. Hyolithes rugosus, n. sp. a Dorsal side of tube ; — b Side 

 view of tube; both mag. f. See p. 194. 



Fig. 5. Aptychopsis terranovicus, n. sp. Side view of right valve ; 

 mag. a. See p. 194. 



Fig. 6. Aptychopsis terranovicus, mut. arcnata. Side view of right 

 valve; mag. ^. Seep. 195. 



P. S. — In the above article is described briefly the Etcheminian 

 Fauna in the locality where it shows to best advantage. Those who 

 wish to know the stratigraphical relations of the rocks which contain 

 it, are referred to the Annals of the New York Academy of Science, 

 Vol. XII., No. 2, pp. 41-56. 



