Thus, the frontal fragment displays a slight concavity of the frontal squame behind glabella, a thin and flattened supra-orbital margin, and marked encroachment of the temporal lines just posterior to the supra-orbital margin.

In the sand dollars, the arrangement of the food grooves and consequently the lateral water vessels and their accessory tube feet is more complex (Phelan 1977).

Whether the field is in the Far North or close to the Equator, the canvas covering offers full protection, for the material is not only processed against the ravages of fire, mildew and rotting but given an arcticizing treatment which keeps it flexible at 40° below zero.

it is referred to a hidden propriety , a specifical virtue , and a fourth quality