268 



vey, though the characters of the posterior angles of the oephalon of that 

 species are still unknown. In the Ekwan River specimens, the eyes are 

 opposite the second lobe of the glabella, the cheeks are coarsely punctured, 

 and each of the posterior angles of the cephalon ends in a short spine. 



E. Billings adopted the name Cheirurus in preference to Ceraurus for 

 the Canadian species of that genus, and in a list of Lower Silurian fossils 

 in the Geology of Canada (1863) gives 1815 as the date of publication of 

 Cheirurus, Beyrich. But, Salter, in his Monograph of the British Silu- 

 rian Trilobites, and the United States palaeontologists, give 1832 as the 

 date of publication of Ceraurus by Green, and 1845 as that of Cheirurus 

 by Beyrich, and consequently use the former of these names. 



In the second part of the third volume of the Final Report on the 

 Geological and Natural History Survey of Minnesota, Dr. J. M. Clarke 

 places V. Tarquinius in the same group, or section of the genus, as C. pleurex- 

 anthemus. But it seems to the writer that the pygidium of a Port Daniel 

 specimen of V. Tarquinius is essentially similar to that of C. Niagarensis 

 or C. insignis, and that it is very different from that of C. pleurex- 

 anthemus. 



A. 3.— FROM SUTTON MILL LAKES. 



From the cliff of limestone on the small island in the noethekn lake. 

 Collected by Mr. D. B. Dowling in 1901. 



ANTHOZOA. 



Tetracoralla. 

 Zaphrentis Stokesi, Edwards and Haime. 

 Four specimens (Lambe). 



Hexacoealla. 

 Favosites Hisingebi, Edwards k Haime. 

 One specimen (Lambe). 



POLYZOA. 



Ph^nopora Kbewatinensis, Whiteaves. 



Plate 24, figs. 6 A 6 os. 



Phcenopora Keewati'nensis, Whiteaves 1904. Geol. Surv. Canada, Ann. Rep., vol. 



XrV, pt. F, p. 40. 



" Zoarium bifqliate, branching, consisting of a thin, flattened frond, 



which is six millimetres wide on an average, but ten mm. wide at a bif ur- 



