292 DR. T. S. COBBOLD ON HUMAN ENTOZOA. _[Nov. 25, 
surface of the lens. From the original description in Von Ammon’s 
‘ Zeitschrift fiir Ophthalmologie’ we are scarcely warranted in con- 
cluding that the specimens were sexually mature. The author speaks 
of ovaries, but they were “indistinct,” and they are not represented 
in the carefully executed figures given in Von Ammon’s writings 
(‘Klinische Darstellungen der Krankheiten des menschlichen 
Auges,’ vol. i. t. 12, and vol. ii. t. 14). I think it likely that 
Von Nordmann’s Monostoma lentis is identical with this worm ; and 
I perceive that Dr. Weinland, of Frankfort, entertains a similar suspi- 
cion. Kichenmeister’s idea that this Monostoma may be a young 
Cysticercus cellulose is not at all convincing ; for no one ever heard 
of eight Cysticerci occupying one eyeball, and much less is it likely 
that they should occur thus gregariously in the human lens. Tre- 
matodes are seldom solitary ; and all the circumstances render it pro- 
bable that the worms extracted by Prof. Jiingken, in his case of 
cataract, were specifically identical with those removed after death 
from the eye of the little girl who died from infantile atrophy whilst 
under Von Ammon’s care. 
5. DisTOMA HETEROPHYES, Siebold. 
D. heterophyes, Siebold & Bilharz, Kiichenmeister, Diesing, 
Leuckart, Cobbold. 
Fasciola heterophyes, Moquin-Tandon. 
Dicrocelium heterophyes, Weinland. 
Inthe month of April 1851, Dr. Bilharz, of Cairo, discovered this 
minute worm in the small intestine of a boy ; and on a second occa- 
sion he collected several hundred specimens under very similar cir- 
cumstances. The parts infested displayed a multitude of reddish 
points, due to the presence of the dark-coloured ova seen in the in- 
terior of the worms. The length of the largest specimens did not 
exceed three-fourths of a line. Their anatomy is fully described by 
Siebold in the fourth volume of the ‘Zeitschrift fir wissensch. 
Zool.,’ and also by Kiichenmeister in his ‘ Manual.’ 
6. BiLHARZIA H2ZMATOBIA, Cobbold. 
Bilharzia hematobia, Cobbold. 
Gynecophorus hematobius, Diesing. 
Thecosoma hematobium, Moquin-Tandon. 
Distoma hematobium, Bilharz, Kiichenmeister, Moulinié. 
Schistosoma hematobium, Weinland. 
Most helminthologists agree as to the propriety of placing this 
remarkable trematode in a separate genus, but some dispute has 
arisen concerning* the priority of the various titles which have been 
proposed. The generic name here adopted is one which I applied 
to asecond species discovered by me six months before Diesing com- 
municated his ‘‘ Revision der Myzelminthen”’ to the Vienna Academy ; 
but I shall have no objection to employ the title Gynecophorus, 
proposed by him, if it be generally thought more appropriate. 
Weinland has expressed to me his willingness to abandon the title 
