(1) This mutant displayed involute leaves and early flowering, although less than clf and icu2 mutants (20 days after sowing).

(2) Although no equatorial sections were recovered, the present specimens exhibit a likely involute initial stage followed by biserial, uncoiled later stage in which chambers are more flattened.

(3) In the Anaspidea there is a tendency for parapodia to enlarge and, together with the mantle, to enclose the fragile shell (with increasingly reduced and involute spire).

(4) Most contemporary goniatitids had an involute shell with compressed whorls.

(5) Distinguishing characteristics are fully double, involute florets that are narrow and pointed.

(6) The fundamental structure of the proloculus is the innermost part of the spirally arranged shell; it resembles the involute type of planispirally arranged foraminifera tests.

(7) They were found to comprise at least three different traits: involute leaves, early flowering, and Apetala flowers.

(8) Both the evolute and involute of a cycloid is an identical cycloid.

(9) The evolute and the involute of an equiangular spiral is an identical equiangular spiral.

(10) They evolved in the Devonian, comprising evolute to involute planispirally coiled conchs quite similar to that of the contemporaneous nautiloids.

(11) Since normals to a straight line never intersect and tangents coincide with the curve, evolutes, involutes and pedal curves are not too interesting.

(12) Hence a curve has a unique evolute but infinitely many involutes .

(13) He defines evolutes and involutes of curves and, after giving some elementary properties, finds the evolutes of the cycloid and of the parabola.