BIBLIOGRAPHY. 
693 
r 2 mm. long, testicles round, side by side, or nearly so ; 
vitellogene glands lateral in middle half of body ; 
posterior extremity possesses a muscular edge. 
D. truncatum. 
I 2 -5—3*5 mm. long ; testicles lobulate, one in front of the 
other; vitellogene glands extend from end of oesophagus 
to middle of body; posterior extremity without muscular 
„ ridge. D. albidum. 
1. Distoma Truncatum (Rud., 1819) Ercol., 1846. 
Synonymy: 
1819. Amphistomum truncatum Rud., found by Otto in hte 
liver of harbor seal ( Phoca vitulina) ; by Rudolphi in 
stomach and iotestines of same animal. 
1825. Distomum conus Creplin, found by Creplin in the 
liver of the cat ( Felts catus domes tica) and the fox ( Cam's 
vulpes); by (?) in the liver of Halichoerus fcetidus); by 
Wagner, liver of cat; by Hilgendori, liver of the glutton 
(Gulo borealis) ; by Braun, liver of cat at Konigsberg. 
1846. Distoma truncatum Ercolani, found by Ercolani in 
dog {Canis familiaris) at Bologna. 
1875. Distoma compamdatum Ercol., found by Ercolaoi in 
the liver of the dog in Italy; by vao Tright and de Jong 
in the dog and cat at Utrecht. 
Specific Diagnosis. —Length 2 mm., form conical (pointed 
anteriorly, truncate posteriorly) ; integment thickly and regu¬ 
larly covered with fine spines ; oral sucker and ventral acetabu¬ 
lum about the same size (0.134-0.172 mm.), the acetabulum 
being situated slightly anterior of the middle of the body ; the 
oral sucker is followed immediately by a pharynx 0.091 mm. 
long, posterior to which the intestine branches into the two 
caecal sacs which extend into the posterior of the body. Im¬ 
mediately anterior to the blind posterior ends of these caeca are 
situated the two elliptical (non-lobulated) testicles (0.172-0.376 
mm. long), seldom side by side at the same height, as the left 
testicle generally lies about one-fourth of its length in front of 
