Lectures on the Comparative Anatomy and Physiology of the Invertebrate Animals: Delivered at the Royal College of Surgeons, in 1843

abdomen alimentary canal analogous Anatomy Anellides animal animalcules antennæ aperture appendages artery Ascidians attached Belemnite bivalves blood body branchiæ branchial Bryozoa calcareous cavity cells cephalic Cephalopods chords ciliated colour commencement compound eyes consists Crustacea Cuvier developed digestive dilated distinct divided dorsal duct elongated embryo Entozoa external extremity eyes female filaments fluid ganglion Gasteropods genus germinal vesicle gills glands head horny Infusoria insects integument interspace intestine jointed labium larva larvæ layer legs lobes locomotive longitudinal male mandibles mantle margin mass maxillæ membrane metamorphoses minute Mollusca mouth muscles muscular fibres muscular system Nautilus nerves nervous system observed oesophagus organisation organs orifice ovaria oviduct ovum pair parasitic plates polypes posterior present processes radiated respiratory rudimental segments sheath shell side siphon slender species spiders spines stomach structure surface tentacles tentacula terminal thorax tissue transverse tube tunic valves vascular veins ventral vesicle vessels visceral wings worm