(1) Formal tools are rare but include scrapers, a discoid and two choppers.(2) Heads on discoid plants have an extra whorl of disc florets instead of ray florets.(3) Eighty-nine were flaked-stone tools; the ninetieth was a carefully shaped discoid , perhaps a mano or grinding stone.(4) The distribution of psoriasis on extensor surfaces, scalp and natal cleft helps distinguish psoriasis from discoid eczema.(5) It has been reported that 20 percent of patients with systemic lupus erythematosus will develop discoid skin lesions; however, most patients who have only cutaneous lupus at presentation will not progress to systemic disease.(6) A further possibility is discoid lupus erythematosus, the technical term for an autoimmune dermatitis of dogs that is usually confined to the face and is frequently made worse by exposure to ultraviolet light.(7) Platelet activation is observed as a morphological change from the resting discoid state to activated spherical cells with pseudopods.(8) Of the five subphyla of the traditional scheme, the first is the Echinozoa, which are usually globose or discoidal in form.(9) A distinguishing feature of the echinoids is that the ossicles imbricate and are fused into a globular or discoidal test; its flattened or concave oral side faces the substratum and the aboral side is arched in most species.(10) All known species of Capisocysta have a spheroidal rather than discoidal shape, and an equatorial flange is never present.(11) The conch is thickly discoidal , with broadly convex sides and rounded venter with rounded ventral shoulders.(12) The stone tool assemblage includes convex end scrapers, bifacially-flaked small knives, and flattened discoids and microliths.(13) The calcite typically occurs as colorless to white discoidal crystals about 4 cm across; however, individual crystals to 30 cm are known.(14) Stone Age tools such as handaxes, cleavers, discoids and scrapers have been discovered in the region.(15) Most identification centres around inclusions - zircon, glassy discoids which sometimes contain fern-like feathers and rutile crystals with blue halos.
