1878.] MR. H. SAUNDERS ON THE LARIN^E. 159 



Hydrocolceus, Kaup, op. cit. pp. 113, 196 (1829). 

 For L. minutus and "L. plumbiceps," " Gulls with black heads 

 and white eye-streak." 



Ichthyaetus, Kaup, op. cit. pp. 102, 196 (1829). 

 Type and sole representative, L. ichthyaetus. 



Laroides, Brehm, Vog. Deutschl. p. 738 (1831). 

 Includes most of the European hoodless Gulls. 



Chroicocephalus, Eyton, Brit. Birds, p. 53 (1836). 



Based upon the coloured hood, small size, and more naked tibia. 

 The latter characteristic only holds good with regard to a limited 

 number of hooded Gulls, and is by no means confined to them ; 

 whilst none of the other peculiarities adduced seem to be sufficient 

 for generic distinction. 



The spelling of this word has been altered to 



Kroicocephalus, Jameson, Journ. Asiatic. Soc. viii. p. 243 (1839), 

 Chroiocephalus, Reichenbach, Nat. Syst. Vog. p. v., 

 Chroecocephalus, Strickl. Ann. Nat. Hist. p. 40 (1841), 

 and to 



Chroocephalus, Scl. & Salv. P. Z. S. 1871, p. 576 (note) 1 . 



Rossia, Bonap. Comp. List B. Eur. & N. Am. p. 62 (1838). 

 For L. roseus. No description of generic character ; and the name 

 had already been employed otherwise by Owen. 



Rhodostethia, Macgill. Man. Brit. Orn. pt. ii. p. 252 (1842). 

 Type, L. roseus. Generic character described. 



Cetosparactes, Macgill. Man. Brit. Orn. pt. ii. p. 251 (1842). 

 Type, Pagopliila eburnea. Generic character described. Name 

 altered to 



Catosparactes, Gray, Gen. Birds, iii. p. 655, note (1845). 



"Plautus, Klein," Reichenbach, Nat. Syst. Vog. Longip. p. 5 

 (1852). 



{N. B. Klein's Hist. Av. Prodromus, pp. 146-148 (1750), is out 

 of date ; and his Plautus includes Auks, Gulls, and Petrels.) 



Glaucus, Bruch, J. f. Orn. 1853, p. 101. 



For the large and medium-sized grey-mantled species. 



"Gabianits, Bp.," Bruch, J. f. Orn. 1853, p. 100 (description); 

 Bonap. Naumannia, 1854, pp. 211, 215; Consp. Av. ii. p. 212 (1857) 

 Type, L. pacificus. 



1 Whilst these sheets are passing through the press, Mr. H. T. Wharton 

 ('Zoologist,' March 1878, p. 105) has pointed out the existence of an adjective, 

 XpoHicbs, meaning coloured ; so that Eyton's error (if any) appears to have been 

 merelv the omission of the marks of diuresis over the second vowel. — H. S, 



[5] 



