igo3l ^BiRD Notes. 163 



them. The?e ribs curve concavely and rather widely forward on 

 each side, and narrowly and convexly forward on the venter. 



It would therefore appear that in Canada the true Inachus 

 undatus of Emmons, which Hyatt refers to Eurystomites but which 

 may be a Plectoceras, has only been found near Kingston, in the 

 Black River limestone. Also, that all the specimens from ihat 

 formation in the Province of Quebec which have been called 

 Lituttes undatus, and similar specimens from the Black River 

 limestone near Ottawa, are either Plectoceras Halli (Foord) or an 

 at present undetermined and possibly undescribed species, whose 

 generic relations have yet to be ascertained. And that Plecto- 

 ceras obscurum is a synonym of P. Halli. 



ERRATA IX PREVIOUS PAPER. 

 On page 119, line 11 from bottom, for "losely" read loosely. 



,, 120, line 9 from bottom, for "1861" read 189K 



,, 121, line 2 from top, for " P. Foordi" read P. Halh. 



\, 121, line 7 from top, for " sipuncle" read siphuncle. 



,, 121, line 8 from top, for " specimen" read species. 



,, 121, line 9 from bottom, for " surtural" read sutural. 



Ottawa, Oct. 20th, 1903. 



BIRD NOTES. 



Canadian Ruffed Grouse {Bonasa u?nbellus to^ata).— An 

 incident illustrating the velocity of flight of the ordinary so-called 

 Birch Partridge of this district, occurred in the middle of Septem- 

 ber last. As I was sitting at my office desk, I was startled by a 

 loud crash of glass close above my head, accompanied by a shower 

 of fragments. Upon examination, I found that one ol the above- 

 named birds had flown through the window. The pane broken 

 was of thick double diamond glass, 3 ft. 4 in. long by i ft. 7 in. 

 wide. The bird had been raised by a dog, about fifty yards from 

 the building, and had flown straight at the window, possibly 

 thinking it was an opening through which it could escape. The 

 velocity was so great that the bird was killed almost instantly, 

 and the breast bone and furcula or wish bone were crushed. 



Pine Grosbeak {Pinicola eniicleata).—Or\ October 30th, on a 

 lawn at the Central Experimental Firm, I saw and watched 

 closely for some time a small flock of about a dozen Pine Gros- 

 beaks, which were busily engaged eating the seeds of the small 



