308 DR. A, E, SHIPLEY ON [ Mar. 16, 
The genital pore is alternate and fairly regularly so; the penis 
often projects, and then it is apparent that the pore lies rather 
anteriorly andis all but overlapped by the imbricated edges of the 
proglottis next in front. 
Sections show that there are a number of calcareous bodies in 
the tissues; some of these are in optical section brick-shaped, 
and others spherical or shaped like a cottage-leaf. These latter 
are bigger than the others and show numerous radiating lines. 
Posteriorly the tissue becomes very highly vacuolated and the 
embryos lie in small packets which do not seem to be in a uterus, 
and may be, as Morell suggests in J. wrogalli, inthe lumen of the 
ovary itself. 
This tape-worm, common in chickens and turkeys, is only an 
occasional parasite of the grouse, and has in many hundreds of 
birds we have examined only been found twice, and in neither 
case has its presence been associated with any lesions. As a 
factor in grouse-disease it may be neglected. in both cases only 
young, immature, not fully grown specimens were met with. 
Its second host is according to Railliet, quoting Grassi and 
Royelli, probably some Coleopteran or Lepidopteran, but at present 
this has not been proved. 
Hymencieris Weinland, 1858, 
(ii.) Hymenotepis microps (Diesing), 1850. 
Synonyms: Zenia microps (Diesing), 1850. 
Hymenolepis tetraonis (Wolfth.), 1900 *. 
This is an extremely delicate, transparent tape-worm which 
exists in almost countless numbers in the duodenum of Lagopus 
scoticus. It is also recorded from the Blackcock and the Caper- 
caillie. On cutting open the duodenum of a grouse infested with 
these worms—and we have rarely found a bird free from them 
except in the winter months—they are not at first apparent. 
They are so fine and so transparent that they are practically 
invisible when alive, and the contents of this part of the 
alimentary canal appears very much like a thick purée. If we 
add to this some fixing agent such as corrosive sublimate this 
purée resolves itself into a mass of very fine, delicate, white 
threads inextricably tangled up together and so numerous that 
there seems but little room left in the duodenum for the passage 
of the food (Pl. LVIITI. fig. 3). Tf, with great care—for they break 
at the slightest strain—we succeed in disentangling one of these 
worms we shall find its head embedded to a greater or less extent 
in the mucous lining of the duodenum, into which, to use a 
poetic phrase, “it nuzzles” whilst the body of the worm floats 
freely in the fluid contents of this part of the alimentary canal. 
Tf we also succeed in freeing the head we now have a complete. 
worm and can study its structure. 
* Wolffhiigel, K., “Beitrag zur Kenntniss der Vogelhelminthen,” Inaug.-Diss., 
Freiburg-1.-B. 2900. 
