The Cambridge Natural History, Volume 2Sidney Frederic Harmer, Sir Arthur Everett Shipley Macmillan and Company, limited, 1896 - Zoology |
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Common terms and phrases
alimentary canal animal anus avicularia body body-cavity body-wall brain branches bristles cavity cells chaetae Cheilostomata chitinous ciliated cirri coelom colony colour consists cuticle disc dorsal ducts earthworms eggs elytra embryos Entoprocta epidermis excretory external female funnel ganglion genera genital genus Gephyrea gills glands groove head hooks host inches intestine introvert larva lateral layer leech length Leptoplana live lobes longitudinal Lumbricidae male marine median membrane mouth muscles muscular Nematodes Nemertines nephridia nephridium Nereis nerve nerve-cord occurs oesophagus Oligochaeta organs orifice ovary ovicell oviduct pair palps papillae parapodia parapodium parasitic pharynx Phoronis Planarians Polychaetes polypide Polyzoa pore posterior proboscis prostomium region reproductive Rotifers sand segments sexual side Sipunculoidea Sipunculus skin species spermatozoa spines statoblasts structure SUB-ORDER sucker tentacles tissue transverse trunk tube usually vascular ventral ventral surface vessel wall wiss worms Zeitschr zooecia zooecium Zool
Popular passages
Page 289 - During these operations, the muddy materials are seen descending between the roots of the fans towards the trowels ; while another organ, perhaps the mouth, is also occupied, it may be, in compounding the preparation with adhesive matter.
Page 289 - ... as they fold and clasp over the margin, like our fingers pressing a flattened cake against the palm of the hand. "During these operations, the muddy materials are seen descending between the roots of the fans towards the trowels ; while another organ...
Page 423 - ... NiS. When added to solution of sulphate of zinc, it either does not precipitate it at all or only very slightly at ordinary temperatures. Sulphide of zinc was not found to precipitate manganese sulphate solution. As the result, then, of the observations and experiments which have been recited I was led to believe that the principal agent in the comminution of the mineral matter found at the bottom of both deep and shallow seas and oceans is the ground fauna of the sea, which depends for its subsistence...
Page 354 - Worms do not possess any sense .of hearing. They took not the least notice of the shrill notes from a metal whistle, which was repeatedly sounded near them ; nor did they of the deepest and loudest tones of a bassoon. They were indifferent to shouts, if care was taken that the breath did not strike them. When placed on a table close to the keys of a piano, which was played as loudly as possible, they remained perfectly quiet.
Page 138 - Nematode worms; 6, 7, 8, 10, 6 are the transverse measurements, while 7, 14, 28, 50, 88 are the corresponding longitudinal measurements. The formula In this case is :— 7...
Page 208 - ... yet it is capable of continuing alive for many months though kept in a dry state. In this state it is of a globulous shape, exceeds not the bigness of a grain of sand, and no signs of life appear ; but being put into water, in the space of half an hour a languid motion begins, the globule turns itself about, lengthens itself by slow degrees, assumes the form of a lively maggot, and most commonly in a few minutes afterwards puts out its wheels...