The capsule is one-celled, and two or three valved, with an imperfect dissepiment in the centre of each valve; and the seeds are numerous, and buried in a resinous fibrous pulp.
The shells are porcelanous and translucent, equivalve, with an external ligament, and at least two cardinal teeth in each valve.
There are two cardinals in each valve and no laterals.
The two valves, accordingly, must be considered as dorsal and ventral valves (as in the Brachiopoda), and the symmetrical halves of each valve as right and left.
These halves may be always easily distinguished, since the oral pole of each valve is constantly different from the aboral pole.
Close to the umbones, on the under side of the basal segment, there is, on each valve, a longitudinal calcified fold, serving as a tooth.
A rectangularly projecting rim, serrated by small teeth, is formed at the bottom of each fresh layer of growth, along the external surfaces of each valve (see upper part of fig.
The muscular scars and the pallial line are distinctly seen on the inner surface, and a peculiar curved shelly plate projects from under the umbo of each valve.
The central or cardinal teeth never exceed two in number in each valve, and the adductor impressions are round and polished.
Further, the inner surface of each valve is marked by the impressions or scars of other muscles, the number and position of which vary considerably in different species.
The ligament is external, the hinge has usually three diverging teeth in each valve, and the pallial line is sinuated.
Median lines not on the same side of each valve of the frustule.
Valves in which the raphe is concealed near the margin on one or both sides of each valve in a more or less elevated keel or wing.
There is sometimes an impression near the front of the umbones, which forms a semicircle on each valve; the space within this semicircle is called the lunule (wood-cut, fig.
These adductor muscles are used for the purpose of drawing the valves together, being composed of contractile fibrous gristle, fastened firmly to the inner surface of each valve.
The above list will hopefully provide you with a few useful examples demonstrating the appropriate usage of "each valve" in a variety of sentences. We hope that you will now be able to make sentences using this group of words.
