We may then reject Latreille's supposition, that the gossamer owes its origin indifferently to the young of several genera of spiders: although, as we have seen, the young of other spiders do possess the power of performing aerial voyages.

(8/7.
Mr.Blackwall in his "Researches in Zoology" has many excellent observations on the habits of spiders.) During our different passages south of the Plata, I often towed astern a net made of bunting, and thus caught many curious animals.
Of Crustacea there were many strange and undescribed genera.

One, which in some respects is allied to the Notopods (or those crabs which have their posterior legs placed almost on their backs, for the purpose of adhering to the under side of rocks), is very remarkable from the structure of its hind pair of legs.

The penultimate joint, instead of terminating in a simple claw, ends in three bristle-like appendages of dissimilar lengths--the longest equalling that of the entire leg.

These claws are very thin, and are serrated with the finest teeth, directed backwards: their curved extremities are flattened, and on this part five most minute cups are placed which seem to act in the same manner as the suckers on the arms of the cuttle-fish.