Owing to the presence of a peculiar irritating vapour which is given out by these lumbricoids, particularly when fresh, several observers have experienced curious symptoms. Thus, Miram on two occasions, when examining _A. megalocephala_, was attacked with sneezing, excessive secretion of tears, with swelling of the puncta lacrymalia, and Huber also experienced a troublesome itching of the hands and neck after examining specimens of _A. lumbricoides_. In like manner I have myself had watery suffusion of the eyes (when collecting the perivisceral fluid for Marcet’s analyses: see Bibliog.), and Bastian has given a detailed account of the serious effects which the poison produced upon him. In Bastian’s case even spirit specimens produced irritation. The attacks of catarrh and asthma were so persistent and severe that they lasted for six weeks at a time. So sensitive was Bastian to the lumbricoid-miasm that he could not even put on a coat that he had worn during his investigations without experiencing fresh attacks of sneezing and other catarrhal symptoms. The attacks became periodical, occurring between five and six in the morning, being accompanied by dyspnœa and a distressing spasmodic cough. Bastian, in short, was quite a martyr in the cause of nematode anatomy. BIBLIOGRAPHY (No. 34).--_Abousson, L._, “On the Presence of Worms (lumbrici) in the Air-passages,” from ‘Arch. Gén. de Méd.,’ in ‘Med.-Chir. Rev.,’ 1836.--(Anonymous), _A. M._, “Another New Worm-trap--an open-topped Thimble in the Nostril (also notice of metallic suspender buttons penetrated by Lumbrici),” ‘Bost. Med. and Surg. Journ.,’ vol. xxvii, p. 121, 1842-43; see also T. G. and W. Stockbridge.--(Anon.), “Lumbrici expelled by Bismuth,” ‘Bost. M. and S. Journ.’ (from ‘Gaz. des Hôp.,’ ‘Journ. des Connaiss. Méd.,’ and ‘Boletin del Inst.-Med.-Valenc.’), 1859.--(Anon.), “Case of one Tapeworm and two Lumbrici causing Epilepsy,” from ‘Bull. du Midi’ and ‘Gaz. Méd.,’ 1839.--(Anon.), “Case of Perforation of the Ileum by Ascarides,” from ‘Hufl. and Ossan’s Journ.,’ in the ‘Lancet,’ 1836.--(Anon.), “Case of Lumbrici in the Biliary the Ducts and Gall-bladder,” note and fig. in third fasc., illust. the Coll. of Morb. Anat. in the Army Med. Mus. at Chatham, 1838.--(Anon.), “A Lumbricus causing Catalepsy, with Fits lasting two or three weeks; Cure by Vomiting,” ‘Lond. Med. Gaz.,’ 1847, p. 415.--_Archer, E._, “On a Case of _A. lumbricoides_ producing alarming symptoms,” ‘Lancet,’ 1857.--_Barwell_, “Case of Ascaris expelled by the swallowing of a foreign body,” ‘Lancet,’ 1857.--_Bastian, H. C._, “On the Anatomy and Physiology of the Nematoids, Parasitic and Free,” ‘Phil. Trans.,’ 1866, p. 545; for the account of his poison-symptoms, see _footnote_, p. 583.--_Batterbury, R. L._, “Jaundice due to the presence of Lumbrici,” ‘British Med. Journ.,’ Nov., 1878, p. 721.--_Bigelow, H._, “Worm in an Abscess,” ‘Bost. Med. and Surg. Journ.,’ vol. xxxiii, p. 486, 1836.--_Blatchley, C. C._, “Two Cases of _A.