38 On Birds lately added to the Museum at Canterbury, N. Z. 



Bill, ui)i)er mandible dark horn-colour, lower mandible 

 liglitcr; crown, occiput, and nape olive-brown, marked with 

 black; from the base of upper mandible a narrow line of white 

 passes in almost a straight line above the eye, merging into pale 

 grey as it descends obliquely towards the nape; a broad stripe 

 of cliestnut commences at the base of the bill, passes through 

 the eye, across the cheek, and meets in a broad band at the 

 back of the neck, forming a richly coloured tippet, widest on 

 the back of the neck ; lower part of the cheek and throat 

 pale grey and brownish grey; chin greyish, almost white; 

 lower part of throat and breast black, each feather marked 

 transversely with two bars of white, indistinctly tipped with 

 pale brown ; breast crossed with a band of rich but light 

 brown, with a chestnut spot in the centre, basal portioji of each 

 feather black, apical portion crossed with two narrow black bars, 

 shafts white ; greater wing-coverts olive-brown, with occasional 

 white and black spots, point of shoulders nearly white ; pri- 

 maries, of which the 2nd, 3rd, and 4th arc nearly of the same 

 length and longest, 3rd and 4th chestnut, barred on the inner 

 and outer web with black; 1st and 2nd marked with bars of 

 white, which on inner web are slightly crcscentie : abdomen 

 black, barred with white, lower abdomen pale fulvous ; front of 

 thighs fulvous, back of thighs slaty black : tail, shafts black, 

 webs olive brown, darkest in the centre ; middle feather with 

 four spots of white, centre feathers of under tail-coverts black, 

 with wliite bars tipped with fulvous; vent black, tipped with 

 deep fulvous. Bill, from gape to tip of upper mandible, 1 inch 

 7 lines ; wing, from plume, 6 inches 2 lines ; tarsus 1 inch 8 

 lines ; middle toe and claw 1 inch 7 lines, hind toe and claw 

 G lines; tail 2 inches 9 lines; extreme length, from tip of man- 

 dible to end of tail, 15 inches 9 lines. 



Larus bulleri. Potts. BuUer's Gull. 



The structure of this graceful sea-bird exhibits a gradual 

 departure from our typical form of Larus, as in L. scojndorum, 

 Forst,, with which and L. melanorhynchus, Buller, it has been 

 hitherto confused. An examination of the structure of the bill, 

 the tarsus, and the foot, shows an approach to the Sternidaj 



