For all these reasons special sense-organs, such as are found in the flabellum of Limulus and in the pectens of scorpions, may be looked upon as giving origin to the vertebrate auditory apparatus.
The identification of the lung-books of Scorpio with the gill-books of Limulus is practically settled by the existence of the pectens in Scorpio (fig.
VIII, The pectens of Scorpio and the first branchial plate of Limulus.
On the other hand, no trace of respiratory appendages excepting the pectenscan be detected in the specimen (see fig.
The oysters and pectensdiffer so widely that they do not even rank in the same family.
They are allied to the Pectens by their form, and their crenulated internal margin.
The pectens are so easily known that I need only mention some fine species, such as P.
Then another shell would follow, and soon all the pectens were leaping up and down in a most extraordinary dance.
The pectens are common forms famous for the beautiful gemlike eyes seen along the edge of their mantles.
A good way to catch pectens is to lower a fishing-line at a spot where the fishermen report "scallop-ground," and drag it along over the bottom.
Latreille seems to think that these vesicles have some analogy with the poisers of Diptera and the pectens of scorpions; and that they are connected with the respiration[1616].
As they are common to both sexes, if their use is connected with the sexual intercourse, it must be similar to that which Treviranus ascribes to the pectens of scorpions, they must be instruments of excitement.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "pectens" in a variety of sentences. We hope that you will now be able to make sentences using this word.
