WHITEAVES.J DEVONIAN FOSSILS OP MANITOBA, ETC. 283 



Productella subaculeata, Murchison. (Sp.) 



Productus suhacuhatus, Murchison. 1840. Bull. Soc. Geol. de France, vol. XI, p. 



255, pi. ii, fig. 9. 

 Le2)tcena frayaria, J. de G. Sowerby. 1840. Tran. Geol. Soc. Lond., 2nd. ser. , vol. 

 V, p. 704, pi. Ivi, fig. 5. 

 " " Phillips. 1841. Pal. Foss. Cornw., Dev. and W. .Somerset, p. 



59, pi. XXV, fig. 100. 

 ProducHis subacvleatiis, Davidson. 1865. Mon. Brit. Dev. Brach., p. 99, (which see 

 for a full list of references to European publications in which 

 this species is described or referred to) pi. xx, figs. 1 and 2. 

 Productella subaadeata, Hall. 1867. Pal. St. N. York, vol. IV, p. 154, pi, xxiii, 

 figs. 4 and 5. 



A few specimens of this well known European species were collected 

 at each of the following localities. North end of Manitoba Island and 

 Onion Point, Lake Manitoba, J. B. Tyrrell and J. F. Whiteaves, 1888. 

 At twelve localities on Lake Winnipegosis ; i. e., at the south end, on 

 Snake and another small island ; on the south-west side, at PointBrabant ; 

 on the north-west side, at Devils Point and in Cameron Bay ; also on the 

 shore and islands of the south-eastern, southern and south-western por- 

 tions of Dawson Bay; J. B. Tyrrell, 1889. Red Deer River near and 

 between the Upper and Lower Salt springs, and Hog Island in Swan 

 Lake, Manitoba . J. B. Tyrrell and D. B. Dow ling, 1889. 



Orthis (Schizopiioria) striatula, Schlotheim. 



For a list of synonyms of this species, with references, see page 218 of the present 

 volume. 



Snake Island, Lake Winnipegosis, Prof. H. Y. Hind, 1858 : Upper Salt 

 Spring, Red Deer River, Prof. Macoun, 1881. 



Orthis (Schizophoria) Manitobensis. (Nom. proy.) 

 Plate 37, tigs. 3, 3 a, 4, 5 and 5 a. 



Shell rather small, resupinate, transversely subelliptical or subquadran- 

 gular, a little broader than long : thickness through the closed valves 

 about one third less than their maximum breadth : hinge area a little 

 more than one half of the entire breadth ; front margin rather deeply 

 sinuated in the centre. Ventral valve much flatter than the dorsal, with 

 a concave sinus at and near the front margin, its hinge area apparently 

 broader in the direction of its height than that of the dorsal, and its beak 

 prominent but nearly straight. Dorsal valve strongly convex, its umbonal 



