Poroceph'alus

[G. poros, pore, kephale, head.] generic term applied to certain worm-like arthropods or their larvas, parasitic in a number of animals and in man. P. armilla'tus, a species occurring in the python, the larva or nymph being occasionally found in man. P. clava'tus, a species found as a parasite in man. P. constric'tus, a larval species living parasitically in the mesentery. P. cro'tali, a species of linguatulide which has been found in the lung of rattlesnake and is thought to infest man occasionally. P. denticula'tus, the larva of Linguatula rkinaria. P. monilifor'niis, a species of which the adult form is parasitic in the python; the larva or nymph may infest man.