44 
level of the centre of the ventral sucker. Typical and so far only 
species Phanjngora retractilis. 
Gen u s—StephanocJiasmus (Looss) . 
Stephanochasmus pristis (Deslongch). (Plate II., fig. 8.) Looss, 
A., "Ueber die Fascioliden Genera Stephanochasmus, etc.," 
Centralbl. f. Bakt., Bd. XXIX., 1901, page 595. 
One specimen only of what I believe to be this worm was found 
in the pyloric cseca of the Cod (October). Unfortunately (as is 
very usual with the species of this genus when taken from their 
hosts, even a few hours after death), it was not in very good 
condition, so that one of the most important characteristics, the 
head spines, could not be made out. The details which could be 
seen, however, agree so well with the characters of S. pristis that 
there cannot be much doubt that it belongs to that species. It is 
long and very thin ; length 7 mm., breadth 0-85 mm. It is like 
a thread, aa Looss remarks. The oral sucker measures 0-13 mm. 
across. There is a long prepharynx, pharynx 0-10 mm. long, and 
a short oesophagus branching into two narrow intestinal lobes, 
reaching almost to the posterior end of the body, filled with a 
dark fluid. The ventral sucker measures 0-19 mm. across, and 
occurs just below the fork of the intestine. The testes are oval, 
0-60 mm. by 0-40 mm., lying one in front of the other, with a 
space of about 0-5 mm. between; the posterior testis is situated 
about 1 mm. from the end of the body. The cirrus sac is curved, 
not reaching halfway between the ovary and the ventral sucker, 
containing a simple club-shaped vesicula seminalis, pars prostatica, 
and long cirrus, the sheath in which the cirrus lies being lined with 
irregularly placed spines, with their points projecting forwards. 
The male duct opens into a small genital sinus, and the outer 
genital pore lies just in front of the ventral sucker. The ovary is 
spherical, placed 1 mm. in front of the foremost testis. The uterus 
has few loops, and ends in a long vagina lined with spines similar 
to those in the cirrus sac, opening into the genital sinus by the 
side of the male duct. The eggs are not numerous, and measure 
0-06 mm. long. The vitellaria are strongly developed, running 
from the extreme posterior end of the body to the posterior end 
of the cirrus sac, composed of many follicles filling up the spaces 
behind, between and in front of the testes and in front of the ovary, 
and connected by a longitudinal duct each side ; the ducts only 
and not the follicles are present at the sides of the testes and ovary. 
