. The sea-beach at ebb-tide : a guide to the study of the seaweeds and the lower animal life found between tidemarks . s the name suggests—the sea-fans, for example. ORDER ALCYONACEAGENUS Alcyonium A. palmatnm. This coral community is found sometimes at low-water mark, but usually in deeper water, attached to .shells and is commonly known as dead-mens-fingers, an unpleasant namegiven it by fishermen because of a fancied resemblance to a humanhand with only the stumps of the fingers. The substance of the coralis semi-cartilaginous, with scattered spicules of lime which give itstabilit
. The sea-beach at ebb-tide : a guide to the study of the seaweeds and the lower animal life found between tidemarks . s the name suggests—the sea-fans, for example. ORDER ALCYONACEAGENUS Alcyonium A. palmatnm. This coral community is found sometimes at low-water mark, but usually in deeper water, attached to .shells and is commonly known as dead-mens-fingers, an unpleasant namegiven it by fishermen because of a fancied resemblance to a humanhand with only the stumps of the fingers. The substance of the coralis semi-cartilaginous, with scattered spicules of lime which give itstability. When the polyps are fully extended the colony is rather at-tractive in appearance, but not so when contracted. It is found inabundance on the New7 England coast. An immense A1c>/oniiim, Para-goryi<( nrhorea, grows on the fishing-banks off Newfoundland, and issometimes brought up on the fishing-lines. It is tree-like in form, andmeasures six feet or more in length. GENUS Tttbipora The organ-pipe coral. This genus, which is deep red in colorand very fragile, consists of many tubes slightly separated from. , organ-pipe conil, natural size. 152 MARINE INVERTEBRATES one another, but connected by horizontal platforms at short in-tervals. The form of reproduction, by budding, in this colony ispeculiar to itself. The spicules of lime secreted in the polypunite or fuse into a tube or cylindrical skeleton. At certainstages of development the polyp sends out a horizontal expan-sion, which unites with the expansions of other polyps and be-comes calcified, forming a shelf which binds the tubes the top of the platforms other corallites are formed, andthus a colony is made, which broadens as it rises in its body of the polyp is green, the skeleton red. It belongs tothe East Indian seas and is given here only as an example of apeculiar manner of growth. ORDER GORGONACEA SEA-FANS, SEA-WHIPS, AND SEA-FEATHERS These are compound, tree-like Alcyonaria, with a ca
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectmarinea, bookyear1901
