Lectures on the Comparative Anatomy and Physiology of the Invertebrate Animals: Delivered at the Royal College of Surgeons, in 1843 |
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Page 7
... ventral disc , by the successive contractions of the parts of which it glides slowly along . The chief mass of its body is made up of the organs of the vegetative function . We see here a wide convoluted alimentary canal , an enormous ...
... ventral disc , by the successive contractions of the parts of which it glides slowly along . The chief mass of its body is made up of the organs of the vegetative function . We see here a wide convoluted alimentary canal , an enormous ...
Page 10
... ventral fins are at some distance behind the pectoral fins , or in their usual place these formed the order Abdominales : in others , as the perch , the ventral fins are attached beneath the thorax these constituted the Thoracic order ...
... ventral fins are at some distance behind the pectoral fins , or in their usual place these formed the order Abdominales : in others , as the perch , the ventral fins are attached beneath the thorax these constituted the Thoracic order ...
Page 13
... ventral sur- face of the abdomen , and are , in most species , united at certain distances by double ganglions , which give origin to the nerves of the extremities ( fig . 3. ) . From the sym- metrical disposition of the nervous centres ...
... ventral sur- face of the abdomen , and are , in most species , united at certain distances by double ganglions , which give origin to the nerves of the extremities ( fig . 3. ) . From the sym- metrical disposition of the nervous centres ...
Page 35
... ventral integument , on the outer side of the principal longitudinal retractor muscles . In Notommata clavulata , Ehrenberg describes two radiated gan- glions in the neck ( d , d ) , superadded to the principal cerebral ganglion ...
... ventral integument , on the outer side of the principal longitudinal retractor muscles . In Notommata clavulata , Ehrenberg describes two radiated gan- glions in the neck ( d , d ) , superadded to the principal cerebral ganglion ...
Page 51
... ventral surface of the segment , indicates the genital apertures . These become conspic- uous in the posterior segments , and are two in number , situated pretty close together on the same prominence ( fig . 25. ) . Head and neck ...
... ventral surface of the segment , indicates the genital apertures . These become conspic- uous in the posterior segments , and are two in number , situated pretty close together on the same prominence ( fig . 25. ) . Head and neck ...
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Common terms and phrases
abdomen alimentary canal analogous Anatomy Anellides animal animalcules antennæ aperture appendages Ascidians attached Belemnite bivalves blood body branchiæ branchial Bryozoa calcareous cavity cells cephalic Cephalopods chords ciliated cloth colour compound eyes consists Crustacea Cuvier developed digestive dilated Diseases distinct dorsal duct Edition elongated embryo Entozoa external extremity eyes female filaments fluid ganglion Gasteropods genus germinal vesicle gills glands head horny Infusoria insects integument interspace intestine jointed larva larvæ layer LECTURE legs locomotive London longitudinal male mandibles mantle margin mass maxillæ membrane metamorphosis minute Mollusca mouth muscles muscular fibres muscular system Nautilus nerves nervous system observed ocelli oesophagus organisation organs orifice ovaria oviduct ovum pair parasitic plates polypes posterior present processes radiated respiratory rudimental segments shell side siphon slender species spiders spines stomach structure surface tentacles tentacula terminal thorax tissue transverse tube tunic vascular ventral vesicle vessel visceral wings worm
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