100 THE AUSTRAL AVIAN RECORD [Vol. III. 



The next is a nice painting of the head and shoulders and 

 foot of a " Petrel, life size, 17th Oct., 1853."' On the opposite 

 page is a long note reading, " Petrel taken on board the 

 William Ernst on Monday 17th Oct., 1853. Lat. 39.39. 

 Long. 116.56. Crown of the head and upper edge of wings 

 brownish black. Round the eyes jet black radiating off into 

 fine points towards the throat. Forehead white speckled with 

 black. Stripe above the eye, throat, cheeks, breast and 

 under-surface of abdomen and tail pure white. Back, wings 

 and tail bluish grey, the latter tipped with white. A portion 

 of the grey passes nearly round the neck forming a collar. 

 Irides nearly black. Bill black. Feet and legs blue, swimming 

 membrane between the toes light dull pink. (Eyelids black.) 

 Drawn while yet alive. After my arrival in Sydney I presented 

 the skin to the Museum. Length 13^ inches. Spread of 

 wing 2 feet ; from the knee to the extremity of the middle 

 claw 3 inches. Figure size of life. S. Diggles. Is this the 

 Procellaria cerulea of Gmelin ? " In pencil the drawing had 

 been determined at some later time as " Procellaria Cookii 

 (G. R. Gray) Zoology of Erebus and Terror," but Diggles' 

 description fixes his first supposition as the correct cne, as 

 it undoubtedly applies only to Halobcena coerulea (Gmelin). 



The last Petrel head is that of " Albatross 29th Oct., 1853, 

 Diomedea cauta" of which the colouring of the bill is of a 

 yellowish green, horny at the base of the culmen ridge and 

 blackish horn at the tip. 



A series of sketches of the islets of Bass's straits and some 

 more Medusa paintings, in some instances accompanied by 

 descriptions, complete the sketches made on the outward 

 voyage. 



The scope and delicacy of the drawings indicate great 

 interest in natural science and accompanying the last drawings 

 of the Medusas is one dated " Jan. 13th, 1855, going to Moretcn 

 Bay," which shows this interest was still maintained whenever 

 Diggles was at sea. 



The remainder of the sketch book consists of sketches of 

 " Australian Bombyces, Sydney, 1854 " ; a sketch of " St. 



