﻿CESTODE PARASITES OF MAN. 548 



in the median line between the ovarian lobes, its anterior limb turning directly 

 cephalad in the median line at about the center of the segment and presenting. 

 in the anterior half of the segment, a spiral formation consisting of from four to 

 six distinct, closely wound coils. In the gravid segment, the uterus presents an 

 exceedingly compact formation consisting of a median stem and numerous long, 

 slender, dichotomous branches, separated by thin partitions and frequently 

 overlapping one another dorso-ventrally. Terminal segments equilateral or 

 slightly longer than broad, measuring from 6 to 8 millimeters in longitudinal 

 and transverse diameters and 3 millimeters dorso-ventrally. Embryophore oval, 

 35 to 41 /i long by 26 to 35 /j. broad. 



Cysticercus unknown. 



Type host. — Homo sapiens. 



Type locality. — Manila, P. I. 



Type specimen. — No. 140, Helminthological Collection, Bureau of Science, 

 Manila, P. I. 



DESCRIPTION OF TYPE SPECIMEN. 



Length 82.8 centimeters : transverse and dorso-ventral diameters respectively ; 

 of head, 1.5 millimeters by 0.75 millimeter; of neck, 0.72 by 0.24 millimeter; 

 of mature proglottides, 10 by 1.3 millimeters; of terminal proglottides, 6 to 8 

 by 3 millimeters. Indentations of lateral margins suggesting segmentation are 

 present close behind suckers; distinct segmentation appears 1 millimeter behind 

 suckers; greatest constriction of neck, 3.5 millimeters behind suckers. (Figs. 

 2 to 4.) Transverse diameters of segments greater than longitudinal diameters 

 except in terminal proglottides which are equilateral or slightly longer than broad. 

 (Figs. 1, 18.) Genital pores prominent, and slightly behind middle of lateral 

 margins of segments. (Figs. 1, 16 to 18.) Surfaces and margins of segments 

 extend posteriorly in an elongated, cuff-like projection overlapping the succeeding 

 segment and are indented by transverse infoldings of the cuticle, which appear to 

 be formed in part, and perhaps wholly, by longitudinal contraction of the 

 specimen. (Figs. 1, 5 to 7.) Calcareous corpuscles absent. 



Head. — Transverse diameter, 1.5 millimeters; dorso-ventral diameter 0.75 

 millimeter, the lesser, dorso-ventral diameter appearing to be due to flattening 

 by cover-glass pressure. Other dimensions as follows: From tip of head to 

 plane passed through anterior borders of suckers, 0.15 millimeter, to posterior 

 border of suckers, 0.64 millimeter ; approximate longitudinal diameter of head, 

 1 millimeter. Rostellum (fig. 3) without hooks and retracted completely within 

 head, its musculature globular, 0.16 millimeter in longitudinal by 0.112 millimeter 

 in transverse diameter; slight depression at tip marks opening of lumen of minute 

 apical sucker. Suckers (figs. 2 and 3) well embedded in musculature of head 

 at its dorso- and ventro-lateral borders with the longitudinal axis of their lumena 

 directed forward and outward; transverse diameter, 0.34 to 0.37 millimeter; 

 longitudinal diameter, 0.37 to 0.4 millimeter; lumena cylindrical to conical, 

 0.224 to 0.260 millimeter deep by 0.19 to 0.21 millimeter broad at their bases. 



'Nervous system. — Situated 0.8 millimeter from anterior extremity of the head 

 and 0.15 millimeter behind plane passed through posterior border of suckers, a 

 large cavity (0.25 by 0.20 millimeter) incloses what appears to be a contracted, 

 globular nerve ganglion (0.16 by 0.11 millimeter). (Fig. 3.) The nerve trunks 

 proceed posteriorly in a straight course, at first dorso-lateral and later directly 

 lateral of ventral excretory canals; concomitant dorsal and ventral fasciculi not 



