2. CHIONAECHUS. 713 



in. Ad. sk. Christmas Harbour, June 18. Dr. McCormick [P.]. 



n. c? ; o, p. $ Marion Island. Voy. II. M.S. ' (Jhal- 



ad. sk. lenger.' 



q. Skeleton. Kerguelen Island. Purchased. 



2. Chionarchus crozettensis. 



Chionis minor (nee Hart.l.), Scl. P. Z. S. 1867, p. 891 (Crozette Isl.) ; 



Newt. P. Z. S. 1871, pp. 57, 58 (Crozette Isl.) ; Sharp*, Phil. Trans. 



vol. 168. p. 102 (1879, pt.). 

 Chionis alba (nee Gm.), Shelley, B. Africa, i. p. 193 (1890). 

 Chionarchus crozettensis, Sharpe, Hull. B. O. Club, v. no. xxxvi. 



p. xliv (189G). 



Adult. Similar to C. minor, but smaller, and distinguished by its 

 smaller bill, with the sheath smaller and its anterior opening 

 scarcely visible, only just raised above the culminal ridge, and not 

 forming a Petrel-like nasal opening as in C. minor: feet dark 

 reddish in skin, not yellow as in C. minor, and with the tarsus 

 longer. Total length 14 inches, culmen 1-15, wing 7'8, tail 3-7, 

 tarsus 1*75. 



Hub. Crozette Islands. 



In my paper in the ' Philosophical Transactions ' on the birds 

 collected by Mr. Eaton during the ' Transit of Venus' Expedition, I 

 remarked upon the darker feet of the Crozette Island Sheathbill. 

 I had only one specimen for comparison at the time, but the two 

 specimens since received show that the species is distinct from 

 C. minor. 



