beneath the conjunctiva of a negro who came from Gaboon. BIBLIOGRAPHY (No. 24). _Davaine_, l. c., p. 839.--_Guyon_, ‘Gaz. Méd. de Paris,’ p. 106, 1841, and in ‘Micr. Journ. and Struct. Record,’ p. 40, 1842, and in ‘Dublin Journ.,’ vol. xxv, p. 455, 1839.--_Idem_, ‘Compt. Rendus,’ tom. lix, p. 743, 1865.--_Guyot_, in ‘Mém. par Arrachait,’ p. 228, 1805.--_Küchenmeister_, l. c., s. 322.--_Lestrille_, in Gervais and Van Beneden’s ‘Zool. Med.,’ 1859, also quoted by Davaine, l. c., 2nd edit., p. 840.--_Leuckart_, l. c., s. 619.--_Moquin-Tandon, A._, ‘Zool. Med.,’ Hulme’s edit., p. 363, 1861. _Filaria lentis_, Diesing.--This is a doubtful species. The worm was first discovered by Nordmann, in a case of lenticular cataract under the care of Von Gräfe, and it was afterwards found by Jüngken in a similar case, as recorded by Sichel. There is also the instance described by Gescheidt, in which Von Ammon operated, and from which brief descriptions of the worm have generally been taken. In this case there were three worms, two measuring about 1/6″ and the third 1/15″ in length. In Jüngken’s case (exhibited by Quadri, of Naples, at Brussels) the worm was more than 3/4″ long. In another case, reported by M. Fano, the worm was somewhat less than 1/4″ long. There is no certain evidence that any of these various worms had developed sexual organs in their interior. It is true that the reproductive organs were described in two of the worms observed by Gescheidt; but after a due consideration of all the facts I fear we must conclude that all the worms in question were sexually-immature and wandering nematodes, possibly referable to Gurlt’s _Filaria lacrymalis_, as Küchenmeister long ago suggested. BIBLIOGRAPHY (No. 25).--_Cobbold_, ‘Entozoa,’ p. 332.--_Davaine_, l. c., p. 821 _et seq._--_Diesing_, ‘Syst. Helm.,’ p. 625.--_Fano_, ‘Traité des Malad. des Yeux,’ tom. ii, p. 498; and in ‘Rec. de Méd. Vét.,’ p. 140, 1869; quoted by Davaine, p. 831.--_Gescheidt_, Ammon’s ‘Zeitsch.,’ 1833, s. 435.--_Leuckart_, l. c., Bd. ii, s. 622.--_Nordmann_, l. c., Bibl. No. 2, s. 7, 1832.--_Sichel_, ‘Iconogr. Ophth.,’ p. 707, 1859. _Filaria labialis_, Pane.--This is a filiform cylindrical worm measuring an inch and a quarter in length. The mouth is armed with four papillæ arranged in the form of a cross. The tail of the female is blunt, the vaginal outlet being placed at a very short distance from its extremity, and a little above or in front of the anus. This parasite was found by a medical student at Naples. It occupied the cavity of a pustule in the upper lip, giving rise to considerable irritation. Only the male worm is at present known. BIBLIOGRAPHY (No. 26).--_Davaine_, l. c., edit. ii, Synopsis, p. 107.--_Leuckart_, l. c. (with a fig.), Bd. ii, s. 616.--_Pane_, “Nota di un elminte nematoide,” in ‘Annali dell’ Acad. degli aspiranti Naturalisti,’ Napoli, ser. 3, vol. iv, 1864.