408 ANIMAL PAEAS1TES. 



most kindly wished to procure me a sight of, were also no longer 

 to be found. Consequently I can only communicate what I find 

 on this subject in literature. To what species this Filaria 

 belongs, I do not know ; it is probably a European Filaria 

 of the domestic animals (either the Filaria lachrymalis of horses 

 and cattle, or the Filaria obtusa of the swallow, most probably 

 the former species, from the size and the region in which it 

 usually dwells). 



Os orbiculare, inerme. Corpus breve subcequale, spiraliter 



involutum, extremilate caudali maris ; feminte clavata 



apice mucronata (?). Longit.\ 5J'" / crassit : vix 1 ^". (Diesing.) 

 In one case of Jiingken and Nordmann, two fine and extremely 

 delicate coils were perceived in the Morgagnian fluid of an 

 extracted lens suffering from gray cataract ; under the microscope 

 these were found to be coiled Filaria. One, as stated, was in- 

 jured ; the other, uninjured one, was of the same thickness 

 throughout, perfectly filiform, |"" long, very thin, coiled up in a 

 spiral, and dead. The intestine was distinct and simple, the 

 mouth without visible papillae, and dark corpuscles were deposited 

 in convolutions round the intestine. The anus protruded in the 

 form of a pad. 



In a lens obscured by Cataracta viridis lenticularis, extracted 

 from an aged woman, the same authors found a living Filaria, 

 5i'" in length, and apparently moulting. 9 



(The other, second case cited by Nordmann, which is men- 

 tioned by Larrey and Meckel, certainly relates to Mongin's 

 Filaria medinensis under the conjunctiva mentioned under 

 species 1.) 



In the case operated on by Von Ammon, and observed by 

 Gescheidt, the tolerably large lens was yellowish-brown, and 

 rather pulpy externally, and furnished internally with a hard, 

 stellate, whitish-yellow nucleus; its fibres, which were arranged 

 in regular striae, were distinct, entangled, and not unfrequently 

 crossed. On the inside of the lens, three Filarice seated upon 

 the lens were seen ; of these, one lay more upon the surface, and 

 was, as well as the second, about 2'" in length, and of a white 

 colour; the third was scarcely f"' in length. The two larger 

 ones were females, according to Gescheidt, but it is not said 

 whether they were perfectly mature. They lay tolerably straight, 

 with the tail a little bent inwards ; only the anterior part of the 

 body was slightly tortuous. The third, and smallest specimen, 



