long appeared to me to present a case of very great difficulty under this point of view; but I have been enabled, by a fortunate chance, elsewhere to prove that two individuals, though both are self-fertilising hermaphrodites, do sometimes cross.
We have examined the cyprid larvae of nine species of cirripedes
and found that their thoracopods always have fused setal arrays of the three types: within and between podites and between appendages (though the number of linked setae varies between species).
Tar pellets and plastics as attachment surfaces for lepadid cirripedes
in the North Atlantic Ocean.
The reproductive periods and condition of the penis in several species of common cirripedes
The Balanidae (or sessile cirripedes
; the Verucidae, etc.).
On gross examination, the most remarkable findings were moderate to severe multiorgan parasitic infection, mainly cirripedes
(Xenobalanus sp.) in the caudal fin; larval cestodes (Phyllobothrium sp.
For instance, the several species of the Chthamalinae (a sub family of sessile cirripedes
) coat the rocks all over the world in infinite numbers: they are all strictly littoral, with the exception of a single Mediterranean species, which inhabits deep water and has been found fossil in Sicily, whereas not one other species has hitherto been found in any tertiary formation: yet it is now known that the genus Chthamalus existed during the chalk period.
The seasonal changes in body weight, biochemical composition and oxygen uptake of two common boreo-artic cirripedes
, Balanus balanoides and B.
And so in the years between, his seasick voyage to the Galapagos on the Beagle and the publication of his masterwork on the origin of species--even as he wrote four long monographs about what he saw while supporting his wrists on wooden blocks to dissect cirripedes
the size of pinheads--he was writing a Prime Mover out of the big picture: "the strongest wings, the largest mouth, the longest legs ..."
On the most battered shores there are organisms able to withstand the beating of the waves, especially mussels, cirripedes
, and limpets.
Latitudinal trends in reproduction, recruitment and population characteristics of some rocky littoral molluscs and cirripedes
. Hydrobiologia 142:1-13.
His work on the "dwarf males" of cirripedes
provides an unequivocal case of terminal stages being deleted in ontogeny.