On Some New And Rare Hydroida in the Australian Museum Span Classsearchterm
On Some New And Rare Hydroida in the Australian Museum Span Classsearchterm
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The male gonothecse are considerably smaller, ovate, not flattened at the summit, and have only a single sarcotheca. Male and female gonothecse are borne on the same colony.
Many of the pinnae of P. Campanula bear secondary hydro- cladia, but the character is not constant. A single pinna may bear two or three of these offshoots arranged alternately, and occasionally tertiary hydrocladia are produced.
The hydrothecal internodes vary considerably in length in different specimens, or even in the s...ame colony, the hydrothecse varying accordingly in their distance apart, so that the superior median sarcotheca, which is normally placed some distance above the hydrotheca, may be situated almost behind the free margin.
P. Campanula differs from all other species known to me (except P. Rubra) in the short stout lateral sarcothecse, which, moreover, are not freely moveable.
The type specimens prove that P. Torresia is identical with P. Campanula. Dr. Von Lendenfeld represents the calycle-margin as somewhat incurved, and with a double tooth at the back, but as there is no trace of these peculiarities in his types, they are probably due to distortion in mounting.
What to read after On Some New And Rare Hydroida in the Australian Museum Span Classsearchterm?
You can find similar books in the "Read Also" column, or choose other free books by William Mountier Bale to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
The male gonothecse are considerably smaller, ovate, not flattened at the summit, and have only a single sarcotheca. Male and female gonothecse are borne on the same colony.
Many of the pinnae of P. Campanula bear secondary hydro- cladia, but the character is not constant. A single pinna may bear two or three of these offshoots arranged alternately, and occasionally tertiary hydrocladia are produced.
The hydrothecal internodes vary considerably in length in different specimens, or even in the s...ame colony, the hydrothecse varying accordingly in their distance apart, so that the superior median sarcotheca, which is normally placed some distance above the hydrotheca, may be situated almost behind the free margin.
P. Campanula differs from all other species known to me (except P. Rubra) in the short stout lateral sarcothecse, which, moreover, are not freely moveable.
The type specimens prove that P. Torresia is identical with P. Campanula. Dr. Von Lendenfeld represents the calycle-margin as somewhat incurved, and with a double tooth at the back, but as there is no trace of these peculiarities in his types, they are probably due to distortion in mounting.
What to read after On Some New And Rare Hydroida in the Australian Museum Span Classsearchterm?
You can find similar books in the "Read Also" column, or choose other free books by William Mountier Bale to read onlineMoreLess
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