DEFINITIOK OF TJENlk FLAVO-PUNCTATA. 



661 



Eegarding the origin of the worm, we are at present unable to give 

 any authoritative decision, and we shall therefore content ourselves 

 with the supposition that, as in the most nearly related species, the 

 worm passes its youth as a Cysticercoid in some insect or snail. The 

 large numbers of the worms by no means contradict this supposition, 

 since, in order to account for them, there is no need of assuming a 

 repeated transmission ; on the contrary, they may be quite sufficiently 

 explained by the observations of Villot regarding the Cysticercoids of 

 Glomeris (p. 367), which, like the Cysticercoids of Stein, from Tenebrio, 

 belong to this group. 



Kilchenmeister's attempt to rank the worm along with Taenia 

 echinococcus is altogether excluded by its organization. 



Taenia flavo-punctata, Weinland. 



Weinland, "Essay on the Tape-Worms of Man," Cambridge, U.S.A., 1858, p. 49. 

 Weinland, " Beschreibung zweier neuer Tsenioiden aus dem Menschen," Nova Acta 

 Acad. C(ss. Lcop.-Carol., t. xxviii., pp. 8-12, tab. iv., 1861. 



This twpe-ivorm. which has hitherto heen only once observed''- and 

 described, attains the length of about a foot. The anterior half of the 

 body consists of unripe joints, 0'2 to 0"5 mm. long, 

 and from 1 to 1"25 mm. broad, each of ivhich 

 exhibits posteriorly a central yellow spot of some- 

 what large size. This is the distended receptaculum 

 seminis (Weinland' s testis). In the second half 

 the joints attain a length of 1 mm., and a breadth 

 of 2 to 2'3 mm. They have lost the yellow spot, 

 and owing to the abundant development of eggs, 

 have assumed instead a brownish-grey colour. 

 The eggs are surrounded by a smooth double 

 envelope, and arc about 0'06 mm. in size. The 

 uterus is a simple wide cavity, vjhich occupies 

 almost the whole segment. The form of the 

 Undermost joints is trapezoidal, with a more or 

 less narrow anterior border, or sometimes almost 

 triangular. The nature of the head is un- 

 Jcnown, (?) but it was probably armed with a 

 single row of small hooks.^ 



sexual organs of Twnia nana. In most points the reconstruction would closely correspond 

 with the drawing given by Feuereisen of the sexual apparatus of Tcenia setigera (see Fig. 160). 



1 [Since the above was written, this worm has been observed in America by Leidy 

 (Proc. Acad. Nat. Sci. Philad., p. 137, 1884), and the same or a closely allied species in 

 North Italy by Parona (Giorn. B. Acad. Med. Torino, fasc. 2, 1884) ; on both occasions 

 the host was a child. — R. L. ] 



" FThe worm observed bvJParona had a club-shaped head, without hooka or rostellum, 



_a L.1 • tJigifizeaoy Wicrosoit® 



Fig. Zii.—Ta;maflai!o- 

 punctata, after Weinland 

 (nat. size). 



