41 
Fig. 60. — Eggs of Pork-measle Tapeworm (Taenia solium): a, with primitive vitelline membrane: b, 
without primitive vitelline membrane, but with striated embryophore. x 450. (After Leuckart, 1880, 
667, fig. 297.) 
Fig. 61. — Half of hog, showing the portions most likely to become infested with Pork-measles. (After 
Ostertag, 1895, 387, fig. 79. ) 
The Pisiform Tapeworm — TAENIA PISIFORMIS^ (Bloch, 1780) Gmelin, 1790. 
[Figs. 62 to 65.] 
Specific diagnosis. — Teenia (Taenia) (p. 36): Strobila attains 0.5 to 2.0 meters in 
length. Head, 1.5 to 2 mm. in diameter; rostellum powerful, armed with a double 
row of 34 to 48 hooks, alternating large (225 to 294/i) and small (132 to 177/0; 
ventral root of small hooks bifid. Neck, 1 to 2 mm. long, slightly narrower than 
head. Genital pores irregularly alternate, very prominent, giving the porose border 
of the segment a convexity. Segments at first narrow and much shorter than broad, 
becoming square about 25 cm. from the head; the straight posterior border is broader 
than the anterior, and thus gives the margin of the worm a serrate appearance; 
a Synonyms. — ? Tsenia canina solium Werner, 1782; IT.cucurbitinay [ccmf.s] Batsch, 
1786a; ?T. cucurbitina Gmelin, 1790a; ?T. serrata canis domestici et vulpis Rudolphi, 
1793a; Tenia serrata Goeze of Beneden, 1861a; Teenia serrata of most authors since 
Kuechenmeister. 
