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.
The reproductive periods and condition of the penis in several species of common cirripedes
have become favored organisms for the study of marine larval settlement because of their range of life forms, their ubiquity as biofoulers, and the structural diversity of juveniles formed by metamorphosis of the settled cyprid.
On gross examination, the most remarkable findings were moderate to severe multiorgan parasitic infection, mainly cirripedes
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
His work on the "dwarf males" of cirripedes
provides an unequivocal case of terminal stages being deleted in ontogeny.
The nine years of work on cirripedes
is the most extravagant example of this characteristic of Darwin's work.
According to Darwin (1854), environmental factors like food, temperature, and quality of water may influence the shape and size of individuals of the same species of cirripedes
Like planktonic crustaceans, the sessile barnacles, the Cirripedes
, as a group are not uniquely associated with coral reefs.