dc

D c) be examined, or better still the figure of a section of the slightly older Scyllium-embryo (Pl.

As will be seen on examination, the rhyme scheme is as follows: a b b a a b b a c d c d c d.

Many of these are before the world in the volume of latter-day Scripture known as the D&C.

To facilitate the drawing of the other teeth, we draw the circles d' c', to which the lines f b and f c are tangent, as shown.

D c represents a so-called “duck mussel” (Lepas anatifera), from the order of the Barnacle crabs (Cirripedia).