292 DR. T. S. COBBOLD ON HUMAN ENTOZOA. [Nov, 25, 



surface of the lens. From the original description in Von Ammon's 

 * Zeitschrift fur 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. iii. 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. Kiichenmeister's idea that this Monostoma may be a young 

 Cystieercus cellulosce 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. 

 Dicrocoelium heterophyes, Weinland. 



In the 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 fur wissensch. 

 Zool.,' and also by Kiichenmeister in his ' Manual.' 



6. BlLHARZIA H^MATOBIA, Cobbold. 



Bilharzia hcematobia, Cobbold. 



Gyncccophorus hcematohius, Diesing. 



Thecosoma haematobium, 'M^oc^m-TsxiAoxi. 



Distoma hcematobium, Bilharz, Kiichenmeister, Moulinie. 



Schistosoma hcematobium, 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 a second 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 Ch/ncecophorus, 

 proposed by him, if it be generally thought more appropriate. 

 Weinland has expressed to me his willingness to abandon the title 



