GNATHOSTOMA SIAMENSE 



28l 



PAPPENHEIM. Ein sporad. Fall v. Ang. int. in. Ostpreuss. (Ib., 1899, xxvi., p. 608.) 



BRAUN, M. Bemerk. z. d. spor. Fall v. Ang. int. in Ostpr. (Ib., p. 612.) 



ZINN, W. Ueb. Ang. intest. (Ib., p. 626.) 



ASKANAZY, M. Ueb. Art. u. Zweck d. Invas. d. Ang. int. i. d. Darmwand. (Ib., 



1900, xxvii., p. 569.) 

 KURLOW, M. von. Ang. int. als Urs. blut. Durchf. b. Mensch. (C. f. B., P. u. I., 



1902 [I], xxxi., Orig., p. 614.) 



(c) Fam. GnathostomidcB. 



Gen. 4. Gnathostoma, Owen, 1836. 



Syn. : Cheiracanthus, Diesing, 1839. 



Easily recognisable by the numerous spines which cover the entire body or 

 only the anterior extremity, and terminate in several points ; head globular 

 and beset with bristles ; mouth with two lips ; two spicules ; vulva situated 

 behind the middle of the body. 



Gnathostoma siamense, Levins., 1889. 

 Syn. : Cheiracanthus siamensis, Lev., 1889. 



Only one specimen, a female, has hitherto been known ; it 

 measures 9 mm. in length, I mm. in breadth. ' There are eight 

 rows of bristles around the head ; 

 the armature of spines extends 

 over the anterior third of the body 

 only ; each spine on the anterior 

 region of the body spreads into 

 three points, of which the middle 

 one is the longest ; the posterior 

 spines are simple ; they gradually 

 become smaller, and then disappear 

 entirely. The vulva is situated 

 behind the middle of the body. 



The single specimen described by 

 Levinsen was found by Dr. Deuntzer in 

 Bangkok (Siam) and was obtained from 

 a young Siamese woman who suffered 

 from a small tumour of the breast, which 

 had developed in the course of a few T F \ G ' ?93- Gnathostoma siamense. 



To the left, the entire worm, 8/1 ; to 

 days. After the disappearance of the the right the head seen from above, 



tumour, nodules, the size of beans, were about 40/1. (After Levinsen.) 



found in the skin ; out of one of these 



the worm was obtained. The same doctor observed this affection in two other 



persons. 1 



'Levinsen, G. M. R., " Om en ny rundworm hos mennesket" (Vidensk. meddel. 

 fra naturh. Foren. i. Kjobenhavn /., 1889, p. 323, with one plate). Ref. in Centralbl. /. 

 Bad. u. Paras., 1890, viii., p. 182. 



