. 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. 470 THE XERVOUS SYSTEM. warrantable violence to terms in general use, and such a change of nomenclature is quite inconsistent with the homo- logy of the parts from a developmental point of view. The optic peduncle exhibits three very distinct bundles of fibres, which I shall term (i) the commissural fibres (m, p) ; (2) the thalamic fibres (v), w
. 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. 470 THE XERVOUS SYSTEM. warrantable violence to terms in general use, and such a change of nomenclature is quite inconsistent with the homo- logy of the parts from a developmental point of view. The optic peduncle exhibits three very distinct bundles of fibres, which I shall term (i) the commissural fibres (m, p) ; (2) the thalamic fibres (v), which include the oculo-olfactory bundle ; and (3) the mesocephalic fibres (;;/), which form the greater part of the optic peduncle. 2. The Inner Medulla may be described as consisting of an anterior medullary mass (ac], which I shall term the corpus ovale, partially embraced behind by a concavo-convex lentiscus ft. '!. I-1'.. 6l.—A lateral section of one of the Optic danglia : ac, anterior capsule; f, middle capsule ; //, the Ux-nia ending in Cuccati's bundle and the posterior commissure ; .^', annular region of the cortex ; /-', the corona ; ,^, posterior, and .V4, anterior, cell groups ; in, fibres of the peduncle entering the mesocerebron ; //ic, middle commissure of optic ganglia traversing the floor of the cavity of the cerebron ; r, external medulla ; ;/, chia-ima f optic nerve; />. posterior fibres of the peduncle ; /v, posterior capsule ; /•/, retina ; ///, thalamic lobe ; r1, thala- mic fibres of the optic peduncle entering the thalamic loU-. (pc) ; this is the posterior capsule of Viallanes. Between the corpus ovale and the posterior capsule there is an intermediate layer, which differs entirely from the posterior capsule and corpus ovale. This I term the middle capsule (c). Many of the fibres of the middle capsule enter the thalamic bundle of the optic peduncle, and others are lost in the corpus ovale (ac) and the lentiscus (pc}. They diverge radially at their
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Keywords: ., bookcentury1800, bookcollectionbiod, bookdecade1890, bookyear1893
