Parasites of Man.
By T. Spencer Colbold, M.D., F.R.S.
I feel sure I need not apologise for bringing under the notice of workers in Science a list of the human Entozoa and Ectozoa. No complete and trustworthy record, brought down to the present time, exists. In view of rendering my list less bald than a mere catalogue of species would inevitably prove, I shall append a few particulars relating to the synonymy of each parasite, its larval condition, and the organ or tissue of the hast it usually occupies. Omitting the Protozoa, I confine my attention to the following six parasitic groups:—1. Trematoda; Flukes. 2. Cestoda; Tapeworms. 3. Nematoda; Roundworms and Threadworms. 4. Acanthocephala; Thorn-healed worms, 6. Insecta; including all such dipterous, aphanipterous, and hemipterous I insects as are either wholly or partially parasitic. 6. Arachnida: including all those trachearian forms, such as the mites and their allies, which aye often vulgarly and erroneously termed scab, or itch-insects. Such is the bill of fare that I have now to offer, and, should it be found presentable and useful, it is proposed to follow it up at some future time by the publication of similar lists relating to the parasites of the horse and other domesticated animals.
As I cannot have the pleasure of reading these papers personally to the Section, and as I am desirous of making them as generally interesting to the members as the subject will permit, I have requested my friend, Mr. W. B. Hughes, to communicate the papers, and to exhibit some specimens on my behalf. The slides and preparations from my cabinet will be chiefly illustrative of the more remarkable forms of Entozoa enumerated in the lists.
Trematoda.
1,—Fusciola hepatica, Linnens. _ ; i Synonymy.—Distome hepaticum, Reizius and Ramdohr; Plunaria, Goeze, , o. Tuarval state-—An armed Cerearia; uct seb distinguished, Free ciliated embryo conical. ; Intermediate Host,—Not known. Probably a fresh water suail. Remarks.—The eammon Hver duke of Ruminants has been found
at leest fifteen times in the human body. iiterature— All standard works on Helminthology (Leuckart,
Daraine, Ktichenmeister, Dujardin, Cobbold.
2—Histonur lanceolatum, Mohlis. . ’ . ee Syn.—D, hepatioum. Zeder and Rudolphi; Dierocaliue, Dnjardin
“and Weinland; Fasciola, Bloch, Planerix, Goeze, Larvie.— Cercaria, form unknown. Free ciliated cabryo globular.
Int. Host, —Not known. Probably a fresh water snail.
- Read hetore the Miernacopical Section of the Birmingham Natural History
and Microscopical Society, Pobruary 1th, 1275, ;
4 The specimens exhibited were, the common fluke, GQ" hepatied,? the Jancet- shaped fluke, (2). lanceolatum,? tne large Dinan Hake, (9. ents) the Uhiuese tr MeConnnell’s fluke, (D. sizense,) the conjoined flake, (D. coup aactend,) ihe minute
Reyptian fluke, (D. keéevophyes) and Rilhorg’s puke (GB, keuuséobin,) e
