. Annals of applied biology. Biology, Economic; Biochemistry. T. GOODEY 35 of the use of animal charcoal. The next cultures were therefore put up with a liberal admixture of this substance with the teased-up droppings so that a moist, not sloppy, medium was finally obtained. This was put into Petri dishes, a shallow layer in each, and the lid of each dish was provided, as before, with clean, moist blotting-paper. The dishes were incubated at 22° C. From these cultures large numbers of ensheathed larvae of both G. strigosum and T. retorlaeformis were obtained in the course of six days. The deve
. Annals of applied biology. Biology, Economic; Biochemistry. T. GOODEY 35 of the use of animal charcoal. The next cultures were therefore put up with a liberal admixture of this substance with the teased-up droppings so that a moist, not sloppy, medium was finally obtained. This was put into Petri dishes, a shallow layer in each, and the lid of each dish was provided, as before, with clean, moist blotting-paper. The dishes were incubated at 22° C. From these cultures large numbers of ensheathed larvae of both G. strigosum and T. retorlaeformis were obtained in the course of six days. The development of the larvae is in every way similar to that of Ancylostoma duodenale described by Looss(4) and of Haemonchus con- tortus described by Veglia(9).. Fig. 1. Tails of ensheathed larvae of A. Oraphidiwn strigosum, B. TrirhostroTtqylus retortaeformis. x 350. On the hatching of the egg a typical rhabditiform larva is produced, having a buccal cavity, the walls of which appear under the microscope as two refractive rods followed by two dots. This is followed by the oesophagus which, for the greater part of its length, is somewhat cigar- shaped, and is then constricted into a much narrower portion, and finally swells out into a bulb within which can be seen the characteristic Y-shaped lining. The intestine succeeds the bulb and presents a wavy outline amidst the granular contents of the intestinal cells and terminates in the anus. After the first ecdysis the larva grows and the oesophagus loses its original appearance, becoming longer and without such pro- nounced demarcation into distinct regions. The posterior bulbous portion seems to become elongated and at the same time flattened. The cells. 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 Association of Applied Biologists; Association of Economic Biolo
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectbiochem, bookyear1922
