1917] The Ottawa Naturalist 123 



Maximum width of same 79 



Length of lateral temporal fossa 140 



Width of same at midlength 42 



Length of supratemporal fossa 64 



Width (transverse) of same _ 30 



Length of maxillary dental grinding surface 175 



Enamelled surface of tooth, about to become functional, in 

 fourteenth vertical row from the front, in right dentary : 



Length ,_ 32 



Breadth 7 



The figures of the two accompanying plates are from drawings by 

 Mr. Arthur Miles. 



explanation of plates. 



Plate VI. Right lateral aspect of skull (type) of Cheneosaurus tolmanensis; 



one-fourth the natural size. To bring the vertebrae clearly into view 



they are represented two and a half inches back of their proper position. 

 Plate \TI. Superior aspect of the same skull: one-fourth the natural size. 

 Abbreviations. Ar, articular; Ax, axis; Cer. 3, third cervical vertebra; 



Dn, dentary; Kx. oc, exoccipital; Fr, frontal; Fr. p., postfrontal; J, 



jugal; L, lachrymal; Mx, maxillary; N, nasal; O, odontoid process; 



P. parietal; Pd, predentary; P.fr., prefrontal; Pmx, premaxillary; 



Q, quadrate; Qj, quadrato-jugal; Sa, surangular; Sor, supraorbital; 



Sp, splenial; Sq, squamosal; a.n., anterior nares; o.c, occipital 



condyle; sc.p., sclerotic plates. 



BIRDS OF LAKE ONIGAMIS REGION, QUE., AND 

 ALGONQUIN PARK, ONT. 



By John M. Cooper, Washington, D.C. 



Introductory Remarks. 



The following two lists of birds were received by the undersigned 

 from the Rev. John M. Cooper. As they apply to districts from which 

 we have little exact information, I requested and received permission 

 from the author to publish them. 



Mr. Cooper informed me that in neither locality were specimens 

 taken, and while the species are undoubtedly correct the sub-specific 

 designations rest only upon the probabilities of known geographical 

 distribution. It is refreshing to find an observer who realizes the 

 difficulties of sub-specific identification and the advisability of making 

 such an explanation. 



The list at the end of the Onigamis list of birds that were expected 

 but not seen is also a feature worthy of being repeated in other such 



work XvW"V\ 



P. A. Taverner. 



