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The supposition that certain Cirripedes might once upon a time have selected the soft ventral surface of a Crab, Porcellana or Pagurus, for its dwelling-place, has certainly nothing improbable about it.
"Cimabue next painted in fresco at the hospital of the Porcellana at the corner of the Via Nuova which leads into the Borgo Ogni Santi. On the front of this building, which has the principal door in the centre, he painted the Virgin receiving the Annunciation from the angel, on one side, and Christ with Cleophas and Luke on the other, all the figures the size of life.
Of fishes, the most remarkable was a Torpedo, with the back of a reddish brown, and smooth; and a Callorhynchus antarcticus: the latter may very well remain in the class of Chimæra. Of crustaceæ, we collected three Canceres, a Portunus, a Porcellana, a Sphæroma, and a Ligia. The dry land along the coast is extremely poor in insects.
It is allied to the species of the second section of the genus Porcellana, as detailed by Professor Milne Edwards in the second volume of the Histoire Naturelle des Crustaces, but has characters sufficient to constitute a new subgenus, to which may be applied the name Porcellanella. The figure represents it of twice its natural size.
The antennae, organs of the mouth, and natatory feet, exhibit the same structure. But the tail bears FIVE pairs of setae, and the dorsal spine is wanting, whilst, on the contrary, the frontal process and the lateral spines are of extraordinary length, and directed straight forward and backward. Zoea of Porcellana stellicola, F. Mull. Magnified 15 diam.
Numerous examples, which might easily be augmented, of such profound differences, are furnished by Leydig's 'Lehrbuch der Histologie. In the Crustacea the ovarian eggs actually sometimes furnish excellent characters for the discrimination of species of the same genus; thus, for example, in one Porcellana of this country they are blackish-green, in a second deep blood-red, and in a third dark yellow; and within the limits of the same order they present considerable differences in size, which, as Van Beneden and Claus have already pointed out, stands in intimate connexion with the subsequent mode of development.
There was but a little plate or vessel of silver, in comparison of the great pride in other things of this town, because in these hot countries they use much of those earthen dishes finely painted or varnished, which they call porcellana, which is had out of the East India; and for their drinking they use glasses altogether, whereof they make excellent good and fair in the same place.
Nevertheless, without changing colour, he raised his eyes and hands to heaven and said, so as to be heard of all, 'O God, praised be still thy puissance! Then, shutting the casket and turning to the people, 'Gentlemen and ladies, quoth he, 'you must know that, whilst I was yet very young, I was dispatched by my superior to those parts where the sun riseth and it was expressly commanded me that I should seek till I found the Privileges of Porcellana, which, though they cost nothing to seal, are much more useful to others than to us.
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