549 
TWO NEW HUMAN CESTODES AND A 
NEW LINGUATULID 
BV 
J. W. W. STEPHENS, M.D. Cantab., D.P.H. 
(WALTER MYKRS FELLOW IN TROPICAL MEDICINE, THE UNIVERSITY OF LIVERPOOL) 
(Received for publication December 20th, 1907J 
I. A NEW BOTHRIOCEPHALID IN MAN 
(Dibothriocephalus parvus n. sp.) 
Three pieces of a tape-worm, none of which had a head, were 
received by me from Dr. Elkington, Tasmania, in 1906, with the 
following history : ‘ It came from a Syrian, not long arrived from his 
native country, and aged 37. It was caught on December 20th, 1898, 
at Launceston, with the aid of Filix mas. A quantity had already 
come away before he came under treatment. So it is possibly a 
Levantine product after all, and not Australian in origin. Lie is 
supposed to have come from Beyrout, but this is not certain. 
A superficial examination shewed that the tapeworm had all the 
appearance of a Dibothriocephalus. I he proglottids had a clearly 
defined central uterine rosette, and with a lens the openings of the 
cirrus and uterus could be seen, and in several segments the 
cirrus was extruded. The surface of many of the segments was 
much corrugated with transverse and longitudinal furrows (probably 
due partly to the preservative and partly to erosion (digestion) of the 
surface. 
The strobila consisted of three portions, the lengths of which were 
respectively 1025, 940 and 690 mm. In the portion, 1025 mm. long, 
there were 420 proglottids, usually broader than long. 1 he smallest 
anterior proglottids measure 1*3 mm. broad by o - 6 mm. long. The 
largest posterior proglottids measure 5‘0 mm. broad by 3 o mm. long. 
The terminal segments tend to become quadrate and measure 4 o 
by 4-0. Several segments approximately quadrate are, howevei, 
interpolated irregularly so that the gradual decrease in breadth and 
