38 



of a living animal, a Gray's paradoxure, ParaJoxurus grayi 

 (habitat, India), and includes one well-developed strobile 

 of the tapeworm together with fragments of several more, 

 one of these fragments consisting of a second head and some 

 of its anterior segments. All of the material was unfavorable 

 for study, both because of the close adherence of extraneous 

 (fecal) matter, which it was impossible to safely dislodge 

 either by mechanical means or by various solvents employed, 

 and because the tissue of the worms was more or less dis- 

 integrated when received and poorly adapted to section and 

 staining methods of study. 



The complete strobile measures 160 mm. in length, and 

 is made up of over three hundred segments. It attains its 

 greatest width in the level between 120 and 140 mm. from the 

 head, where the links (Fig. 4) are 3 mm. wide and 1 mm. long; 

 thence posteriorly it narrows to a terminal link slightly more 

 than 1 mm. wide and 2 mm. long. The anterior links 

 (Fig. 3) are decidedly wide in proportion to their length, 

 measuring at 20 mm. from the head 0.45 mm. wide and 0.04 

 to 0.06 mm. long. There is no neck, the first segment being 

 clearly outlined immediately back of the head, being 0.25 mm. 

 wide and 0.03 mm. long. Viewed laterally the head (Fig. 1) 

 is slightly wider than the first segments, and is provided 

 with four suckers and a low, broadly conical, retractile ros- 

 tellum devoid of armature. The retractile character of the 

 rostellum is inferred from the fact that in one of the heads 

 the frontal region between the suckers was practically flat, 

 while in the other the conical appearance described was 

 definitely present. Viewed from the front (Fig. 2) the out- 

 line of the head is a quadrilateral, with the dorsoventral 

 diameter slightly greater than the lateral (dorsoventral, 0.35 

 mm.; lateral, 0.25 mm.). The suckers are prominent, oval 

 in shape, with their long axes in the long axis of the strobile ; 

 and open by a curved, slit-like orifice extending in the lon- 

 gitudinal direction of the worm. Suckers measure 0.15 by 

 0.13 mm. 



