Feathered dinosaur the deciduous sheath, forming a tuft of unbranched barbs with a basal calamus. Stage III consists of two developmental novelties, IIIa and IIIb, as either could have occurred first. Stage IIIa involves helical displacement of barb ridges arising within the collar. The barb ridges on the anterior midline of the follicle fuse together, forming the rachis. The creation of a posterior barb locus follows, giving an indeterminate number of barbs. This resulted in a feather with a symmetrical, primarily branched structure with a rachis and unbranched barbs. In stage IIIb, barbules paired within the peripheral barbule plates of the barb
USS Calamus (AOG-25) USS Calamus (AOG-25) USS "Calamus" (AOG-25) was a "Mettawee"-class gasoline tanker acquired by the U.S. Navy for the dangerous task of transporting gasoline to warships in the fleet, and to remote Navy stations. "Calamus" was launched 4 May 1944 by East Coast Shipyard, Inc., Bayonne, New Jersey, under a Maritime Commission contract; sponsored by Mrs. A. H. Moore; transferred to the Navy 7 July 1944; and commissioned the same day, Lieutenant W. Hord, USCGR, in command. "Calamus" sailed from Norfolk, Virginia, 13 September 1944, bound for Pearl Harbor and Ulithi, where she arrived in mid-December and began her work as