. Journal of Agricultural Research. ead of Necalor americanus free-li\ inglarvae when full grown; between them the front view of the head and an optical sectionnear the line A ^ ;/>/>/, one of the four labial submedian papillae; o ?j .onchium or pharj^nx;ce, oseophagus; glsal dsl, dorsal oesophageal gland; chrddsl, dorsal chord; ampk, amphid;amp, ampulla of the dorsal oesophageal gland; ph, pharynx; os gl, dorsal oesopha-geal gland emptying into the lumen of the oesophagus or pharynx; msc?, contractilefibers(?); dir on, guiding ring encircling the anterior portion of the phar^nx; trmamph
. Journal of Agricultural Research. ead of Necalor americanus free-li\ inglarvae when full grown; between them the front view of the head and an optical sectionnear the line A ^ ;/>/>/, one of the four labial submedian papillae; o ?j .onchium or pharj^nx;ce, oseophagus; glsal dsl, dorsal oesophageal gland; chrddsl, dorsal chord; ampk, amphid;amp, ampulla of the dorsal oesophageal gland; ph, pharynx; os gl, dorsal oesopha-geal gland emptying into the lumen of the oesophagus or pharynx; msc?, contractilefibers(?); dir on, guiding ring encircling the anterior portion of the phar^nx; trmamph, terminals in the amphid, presumably the end elements of nerve fibers; sal,dorsal oesophageal gland; nrv, and opposite AA, nerve passing to one of the submedianlabial papillae; lum oe, lumen of the oesophagus. The dorsal and lateral sketches weremade from living specimens, the front view and section from specimens fixed inFlemmings solution and mounted in glycerin jelly. (362) KJ Pharynx and Alinnentary Canal of the Hookworm Larva. MiM i^^^^^r;_7 ? ;i<i^rrrr fc^ Plate I %
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