1862.] DR. T. 8. COBBOLD ON HUMAN ENTOZOA. 299 
I have also'myself noticed in connexion with two cases where nearly 
all the voluntary muscles of the human body were crowded with 
Trichine. (4.) In a few days after the ingestion of fresh-encysted 
Trichine, the worms acquire sexual distinction and maturity ; the 
ova and young are in a few more days equally rapidly developed, 
and the latter soon escape from the parent, per vaginam, to commence 
active migrations on their own account ; this they do by penetrating 
the walls of the intestine of the host, from whence they pass quickly 
to the voluntary muscles, where they eventually become encysted. 
According to Virchow’s conclusive testimony, all these phenomena 
occur within the space of a single month ; and, in his experiments, 
even as early as three weeks after ingestion the young were found 
to equal in size those that he administered at the commencement. 
The genesis and migrations of T’richina are therefore astonishingly 
rapid, and probably without parallel in this class of parasites. 
(‘Comptes Rendus,’ for July 1860, p. 13; also in ‘ Annales des 
Sciences Naturelles,’ series 4, vol. xiii. p. 109.) The organization 
of Trichina in the encysted condition has been accurately given by 
Owen, Luschka, Bischoff, Valentin, Sanders and Kirk, &c., its 
adult and embryonic structure being also beautifully illustrated by 
Leuckart (‘ Untersuchungen tiber Trichina spiralis, 1861; and in 
the ‘ Gottinger Nachrichten’ for April 30, 1860, p. 135). 
14. Fruaria MEDINENSIS, Gmelin. 
F. medinensis, Gmelin, Olfers, Rudolphi, Jacobson, Lamarck, 
Gescheidt, Chiaje, Richeraud, Chapotin, Williamson, Scott, Adam, 
Kennedy and Smyttan, Young and Jamieson, Cuvier, Weihe, Oppen- 
heim, Charvet, Mare and Laennec, Leblond, Wagner, Clark, Blott, 
Eschricht, Oken, Siebold, Dujardin, Dutschek, Creplin, Fischer, 
Heath, Brulatour, Maisonneuve, Diesing, Carter, Busk, Cobbold, 
Cezilly, Robin, Thibaut and Benoit, Moquin-Tandon, Weinland, &c. 
F.. dracunculus, Bremser, Clelland, Pruner. 
Furia medinensis, Modeer. 
Gordius medinensis, Linnzeus, Bruguiére. 
Vermis medinensis, Grundler. 
Dracunculus, Lister, Gallandatus. 
D. persarum, Kampfer. 
This species is well known to our medical brethren in India and 
the East ; and probably no parasite has had so much written about it 
as the Guineaworm. Among modern investigators nothing can 
equal the patience and perseverance of Mr. Carter, F.R.S., of Bom- 
bay, who, month after month, for many years past, has been devo- 
ting his energies towards the elucidation of the habits, economy, and 
development of the Dracunculus. The structure of the adult female 
is well known ; but it is still extremely doubtful if the male has ever 
been seen. Prof. Owen believed himself to have found the male, and 
he accordingly described it ; but Mr. Busk’s subsequent observations, 
as well as the experiences of those who, from their position, have be- 
come familiar with Dracunculus, alike go to prove that we are still 
