292 



Corallum similar to the typical form of P. pygmcea, in internal structure 

 and external shape, but apparently always a little larger. The specimens 

 from the Saskatchewan average about ten millimetres in height and 

 occasionally attain to a still larger size, while Anticosti specimens of 

 r. pygmaea average only six mm. in height and are not known to exceed 

 ten. 



Saskatchewan River, tramway at Grand Rapids, J. B. Tyrrell, 1890 : 

 several specimens, on the weathered surfaces of small pieces of limestone. 



Hexacoralla. 

 Favosites Gothlandious, Lamarck. 



Saskatchewan River, at Roche Rouge, Cross Lake Rapids, and Chem- 

 ahawin, J. B. Tyrrell, 1890 : a few specimens from each of these localities 

 (Lambe). 



Favosites aspee, d'Orbigny. 



Saskatchewan River, at Roche Rouge, J. B. Tyrrell, 1890 ; and in the 

 Pentamerus beds at the Grand Rapids, D. B. Dowling, 1891 ; a few speci- 

 mens from each of these localities (Lambe). 



Alveolites Niagarensis, Rominger. 



Specimens, which Mr. Lambe has identified with this species, were 

 collected at Grand Rapids, Roche Rouge, Cross Lake Rapids and Chema- 

 hawin, by Mr. Tyrrell in 1890 ; and at the Grand Rapids by Mr. Dowling 

 in 1891. 



Haltsites catenolaria, L. 



Saskatchewan River : at the the foot of Grand Rapids ; at Cross Lake 

 Rapids ; at Old Fort Island, Cedar Lake ; on the west shore of Cedar 

 Lake ; and at Chemahawin. At each of these localities specimens were 

 collected by Mr. Tyrrell in 1890. 



Halysites compactus, Rominger. 



Hall/sites compactus, Rominger 1876. Geol. Surv. Mich., Fossil Corals, p. 



78, pi. 29, fig. 3. 



„ II Whiteaves 1884. This volume, pt. I, p. 2. 



Halysites agglovieratus, var. compactuSj 



Whiteaves 1895. Idem. pt. II, p. 48. 



Halysites compacta, Lambe 1899. Contr. Canad. Palaeout., vol. IV, pt. 



I, p. 71, pi. 4, figs. 5, 5 a, 6, 7, 8 and 8 a. 



Saskatchewan River, foot of Grand Rapids, J. B. Tyrrell, 1890 : one 

 specimen (Lambe). 



