Expedition to the Eastern Canary Islands. 235 



like also to acknowledge the help which I have received 

 from Mr. Tom Iredale^ whose exceptional knowledge of 

 scientific literature has often enabled me to determine 

 obscure references which would otherwise have been 

 passed over. 



I regret that in Part I. of my paper I omitted to acknow- 

 ledge the debt which I owed to Mr. Claude Grant, who 

 kindly assisted me in selecting the commissariat of the 

 expedition. 



The total results of the collections made, including 

 specimens from Gran Canaria, comprise 412 bird-skins 

 (including 3 new subspecies), 224 eggs, and a few skeletons 

 of the more interesting forms ; two hedgehogs of a new 

 species, ten bats, and one rabbit. Besides these, large 

 collections of entomological, botanical, and geological spe- 

 cimens were procured. 



Corvus corax tingitanus. Moroccan Raven. 



Corvus corax tingitanus Irby ; Bannermau^ Part I. pp. 49, 

 58, 61, 75, 85, 88. 



Corvus corax canariensis Hart. & Klein. 



In my recent paper on the birds of Gran Canaria (^ Ibis,' 

 1912, p. 625), I discussed the possibility of upiiolding 

 C c. canariensis as distinct from the form inhabiting the 

 neighbouring African coast. Eventually I came to tl.e 

 conclusion that specimens from Gran Canaria must be 

 united with C. c. tingitanus Irby. 



I have lately had occasion to re-examine the material 

 from the Canary Islands in the British Museum; this 

 has only served to strengthen the views which I originally 

 expressed. Examples from Tenerife, Gran Canaria, and 

 Fuerteventura cannot be separated from the Moroccan 

 Eaven. The type of C. c. tingitanus Irby, in the National 

 Collection, possesses an excejitionally short and thick bill, 

 while certain other examples from Morocco and Algeria 

 have longer, weaker, and straighter beaks than in the type- 

 specimen. 1 have already drawn attention to the Havens 

 from Gran Canaria which have the bill, if anything, heavier 



