Pelecanoides urinatrix -- Common Diving Petrel. Alternate name on piece: Puffinuria urinatrix [Diving petrel] Finished watercolor. As in Gould item 2282 and 2283, the drawing shows the bird as lightly shaded white while the published plate shows darker gray for head, back and wings; but see Notes to Gould item 2286. Previously cited as GS20 or 20GS and so marked in pencil on reverse. Artist's name(s): Gould, John; Richter, Henry Constantine.