822 PROCEEDINOS OF THE NATIONAL MUSEUM. vol. xxvm. 



EXPLANATION OF PLATE XXXV. 



Letters having the same meaning in the different tigures: 



b. Suckers of scolex. 



hi. Bladder of cysticereus. 



c, (■', c". Cyst of connective tissue inclosing bladder. 

 cu. Cuticle. 



ex. External pore communicating with inverted portion of cysticercus. 



g. Granulo-fibrous layer of inverted portion of cysticercus. 



i. Folds on inner wall of bladder at point of invertion. 



I. Fine longitudinal fibers. 



Iv. Lateral, longitudinal vessels of inverted portion of cysticercus. 



m. Lumen of inverted portion of cysticercus. 



p. Parenchyma. 



s. Scolex. 



t. Filiform inverted portion of cysticercus. 



Fig. 1. Cyst cut open on one side, showing the outer and thicker connective tissue 

 layer c of the cyst proper, the inner and thinner layer hi or bladder, the 

 point of invertion /, and the tiliform, inverted portion t. Actual length 

 of cyst 30 mm. 



2. Bladder removed from cyst, opened and reflected, showing the filiform 



portion with its point of attac-liment and the l>lunt, inverted scolex. 

 Enlarged about 2 diameters. 



3. A large cyst, 48 by 40 by 22 mm. in the three principal diameters. The 



outer wall has been cut open and reflected, showing that what at first 

 ajspeared to be one cyst has others included within its outer wall. Each 

 of the included cysts is surrounded by connective tissue. Upon removal 

 of the outer coat there appeared to be three cysts inclosed, c^. One of 

 these, after further removal of connective tissue, was found to inclose two 

 cysts, c^^ . In other words, the primary cyst inclosed four bladder worms, 

 which, starting from four larv;e near together, grew and became envelo2:)ed, 

 at first in individual cysts and later in a common cyst, c. 



4. Cysticercus removed fi-om cyst. The filiform portion is protruding from a 



perforation in the wall of the bladder. 



5. Another cysticercus with a window cut in the wall to show that the filiform 



portion is not everted, but is perforating the wall. 



6. Transverse section of filiform portion of cysticercus near the scolex. The 



section was 0.45 by 0.37 mm. in the two principal diameters. 



7. Transverse section of filiform portion of cysticercus near middle of its length. 



The section was 0.66 bj' 0.50 mm. in the two principal diameters. 



8. A nearly transverse section through the scolex. 



9. A nearly longitudinal section through the scolex. 



10. A cysticercus with a portion of the bladder cut away so as to show the pore 



on the exterior and its continuation in the filiform portion. 



11. Diagram showing the relation of the bladder to the inverted filiform portion 



and scolex. 



12. Pediceled cyst; actual length of cyst, not including pedicel, 30 mm. 



Figures 1 to 7 from lot collected October 7, 1901; figures 8 to 10 and 12 

 from lot collected July 29, 1899. 



