THE GENUS LAllUS. 
255 
The name Icucomelas is evidently improper, being equal- 
ly applicable to this and the two following species, which 
are all MvKo^iXotviq ; bathyrinclius expresses the most essen- 
tial characteristic of the species, and is therefore a better 
name. 
2. Larus mariiius. Carrion Gull. 
L. rostro superne leniter aucto, dorso alisque ardoisia- 
ceis, pennis apice albis, prioribus qiiinque (vel inter- 
dum sex) nigricantibus, alis caiida brevioribus. 
Adult, Winter Plumage. — Beak, shortish, Very deep, 
much compressed, slightly gibbous above, wine -yellow 
tinged with gamboge, a bright orpiment spot at the knob 
of the lower mandible; length 2| inches, depth at the 
knob |ths. Naked margin of the eyes red, iris yellow 
marbled with brown. Feet flesh-colour, claws brownish- 
black ; tarsus 3 inches, middle-toe 3 inches. Wings a little 
shorter than the tail; total length S8 inches, extent 60 
inches. Back and wings slate-purple ; quills white at the 
end ; first quill nearly all blackish-brown, this colour ex- 
tending obliquely inwards to the fifth quill, a small spot 
on the outer web of which only is black ; a whitish mark 
on the inner webs within the black ; shaft of first quill 
nearly white to the middle, of the others corresponding 
with the colour of the webs. The rest of the plumage 
snow-white. A few short longitudinal pale brownish streaks 
on the back of the head and neck ; a number of black 
bristles about the fore-part of the eye. 
Adult, Summer Plumage. — Beak bright yellow, an 
orange spot on the lower mandible, irides fine yellow, eye- 
lids red-orange, legs flesh-coloured; head and neck pure 
white ; the rest of the plumage as in summer. 
