224 \Y1NTERTON C. CURTIS. 



PLATE V. 



Figures of late stages in the proglottid formation of C. laciuiatnm. All from 

 camera lucida drawings. The magnifications are for the figures as reproduced. 



FIG. II. A specimen with 8 "anterior" and 35+ "posterior" proglottids and 

 showing a greatly elongated, non-segmented zone. < 12 diameters. 



FIG. 12. An entire specimen in which the non-segmented zone has been greatly 

 reduced by the appearance of 30-)- "anterior" and 200 -j- "posterior" proglottids. 

 < 12 diameters. 



FIG. 13. The non-segmented region of a specimen in which the "anterior" and 

 " posterior" segments are just meeting to obliterate the non-segmented area. Such 

 a stage would be slightly beyond that of Fig. 12. In this instance there were 40 

 + "anterior, " 250+ " posterior" proglottids. < 50 diameters. 



FIG. 14, a-n, represents the appearance of the proglottids and their proportions 

 in a young adult specimen which contains about its maximum number and is just 

 beginning to liberate ripe proglottids at its posterior end. The length of the regions 

 not drawn in is represented by the straight lines. The letters show the sequence in 

 which the pieces should be arranged. The number of proglottids up to that point is 

 marked at the posterior end of each section drawn. The total number of proglottids 

 was about 506. X I2 diameters. 



