. The anatomy, physiology, morphology and development of the blow-fly (Calliphora erythrocephala.) A study in the comparative anatomy and morphology of insects; with plates and illustrations executed directly from the drawings of the author;. Blowflies. I'lG. 53.âThe brain of ihe Crayfish : /. Seen from above ; 3. Seen from the side. a, olfactory ganglion ; a', nerve to antennule ; a, ganglion of the cms ; a', nerve to great antenna ; c. n; c. «â , cesophageal connectives j in, in\ mesocerebron ; Ik, thalamon ; iiif, ml, melacerehron ; 0, optic peduncle. knowledge of the actual structure of t
. The anatomy, physiology, morphology and development of the blow-fly (Calliphora erythrocephala.) A study in the comparative anatomy and morphology of insects; with plates and illustrations executed directly from the drawings of the author;. Blowflies. I'lG. 53.âThe brain of ihe Crayfish : /. Seen from above ; 3. Seen from the side. a, olfactory ganglion ; a', nerve to antennule ; a, ganglion of the cms ; a', nerve to great antenna ; c. n; c. «â , cesophageal connectives j in, in\ mesocerebron ; Ik, thalamon ; iiif, ml, melacerehron ; 0, optic peduncle. knowledge of the actual structure of the brain in insects has been too incomplete to permit any accurate comparison. I have taken the supra-oesophageal ganglia of the Crayfish (Astacus) as a fair type of the preoral centres of the generalised Arthropod. In the dorsal view (Fig. 53, /) three pairs of ganglia are recognisable in the central brain mass; three pairs of sensory ganglia also exist, connected with the eyes, anten- nules and antennae. So that there are six pairs of ganglia. Three pairs which belong to the brain proper, the central ganglia, and three to the sensory organs, sensory ganglia. The anterior and posterior pairs of central ganglia each con- sist of a single reticular nucleus, but the lateral pair are more complex ; each contains two reticular nuclei, separated by a. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Lowne, Benjamin Thompson, 1839-. London, Pub. for the author by R. H. Porter
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Keywords: ., bookcentury1800, bookcollectionbiod, bookdecade1890, bookyear1890
