Archive image from page 55 of The anatomy, physiology, morphology and. 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; CUbiodiversity4765349-9885 Year: 1890 ( 42 THE LARVA OF THE BLOW-FLY. In front of and above this median tooth there is a remarkable invagination of the hypoderm (Fig. 7, in) which extends over the pharynx, and communicates with the sac from which the imaginal discs of the head of the nym
Archive image from page 55 of The anatomy, physiology, morphology and. 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; CUbiodiversity4765349-9885 Year: 1890 ( 42 THE LARVA OF THE BLOW-FLY. In front of and above this median tooth there is a remarkable invagination of the hypoderm (Fig. 7, in) which extends over the pharynx, and communicates with the sac from which the imaginal discs of the head of the nymph are subsequently deve- loped. This invagination is undoubtedly the fore-head (Vorder- kopf) of the embryo, which is invaginated between the maxilla;. Below the median tooth is the true mouth orifice. The tooth itself is clearly the labrum, or upper lip; with which, I think it extremely probable, the mandibles are fused, although the evidence of this is obscure. Fig. 8.—Sections of ihe bead of the adult larva (40 diam.) —i, a vertical median section ; sd, stomal disc ; 2, a transverse section in the line -v x' in I. The curve is due to the position of the heal, that represented in Fig. 4, C ; h, the great hook ; hy, hypostomal sclerite ; m, mouth ; //;, pharynx ; cp, anterior inferior process of the cephalo-pharynx ; rt', oesophagus ; sd, salivary duct. The section shows the grooves in the hypopharynx—3, section through the mouth and pharynx, in the line j'' in I, showing imaginal discs I. Below and behind the labrum is the orifice of the salivary duct in the rudimentary ligula, which is undoubtedly the homo- logue of the ligula of the caterpillar, Figs. 6, 7 and 8. In the newly-hatched larva the stomal discs are relatively
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Keywords: 1890, archive, blowflies, book, bookauthor, bookdecade, bookpublisher, booksubject, bookyear, drawing, historical, history, illustration, image, london_pub_for_the_author_by_r_h_porter, lowne_benjamin_thompson_1839_, page, picture, print, reference, vintage
