I beleive this to be Angel II by Abbott Handerson Thayer. Thayer was a well known naturalist and painter of figures, animals, landscapes, etc. His work is valued among the greatest American art collections.
Vanitas still life by PieterClaesz. This is an example of a vanitas, a sort of still life painting depicting the subject(s) in a meaning of emptiness in the object’s uselessness or insignificance. Vanitas are often known for reflecting decay, as is with this painting. The painting in general gives a grey feeling; the rotted parchment in between slabs of abandoned wood along with the other assortment of objects nearly mixes in with the ash wall. The only striking subject seems to be the skull and its accompanied bone which has a message of its own: all things come to an end. The painting reflects the 17th century’s interest with death and the prominence of the earthly realm.