Pennaceous feather Pennaceous feather The pennaceous feather is a type of feather present in most modern birds and in some other species of maniraptoriform dinosaurs. A pennaceous feather has a stalk or quill. Its basal part, called a "calamus", is embedded in the skin. The calamus is hollow and has pith formed from the dry remains of the feather pulp, and the calamus opens below by an "inferior umbilicus" and above by a "superior umbilicus". The stalk above the calamus is a solid "rachis" having an umbilical groove on its underside. Pennaceous feathers have a rachis with "vanes" or "vaxillum " spreading
What the Little Bird Told Him thirteenth and final episode of the season. Gotham, originally scheduled for 16 episodes, still has 10 more to go though, and it’s unclear how the show is going to be able to sustain the (very) slight momentum this episode built." What the Little Bird Told Him "What the Little Bird Told Him" is the twelfth episode of the television series "Gotham". It premiered on FOX on January 19, 2015 and was written by Ben Edlund, and directed by Eagle Egilsson. In this episode, Gordon (Ben McKenzie) looks to capture a prisoner who escaped from Arkham Asylum to get his job