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SUMMARY OF CURRENT RESEARCHES RELATING TO 
fatally. The most obvious symptoms were extreme emaciation, anaemia, 
and oedema in the submaxillary region, and, in advanced cases, profuse 
diarrhoea. The parasites are small, yellowish-white, hair-like Nematodes, 
about one-third of an inch in length. They form nodules on the 
abomasum walls and cause erosions of the mucous membrane. It is 
probable that infection is direct. The parasites are blood-suckers. 
Treatment is difficult and uncertain. The outbreak referred to is the 
second in the United States. The parasite has occurred also in Germany, 
England, Argentina and New Zealand. J. A. T. 
New Species of Mecistocirrus. — Kaoru Morishita ( Annot . Zool. 
Jayon ., 1922, 10, 89-99, 1 pi., 1 fig.). Description of M. tagumai sp. n. 
from the stomach of cattle in Japan, a fourth species of the genus 
Mecistocirrus. The new species is most nearly allied to M. fordi , but is 
distinguished by the larger size, the presence in the female of a 
prominent dilatation in the posterior part of the body (where the lateral 
lines and rows of somatic muscle-cells undergo a remarkable change in 
direction), and the close proximity of the vulva to the anus. The 
longitudinal cuticular ridges are anteriorly 50 and posteriorly 84. 
J. A. T. 
Nematode in Field Cricket. — James E. Ackert and F. M. 
Wadley ( Trans . Amer. Micr. Soc ., 1921, 40, 97-118, 1 pi., 3 figs.). 
A new Nematode, Gephalobium microbivorum Cobb, was found at Man- 
hattan in the ileum of Gryllus assimilis. The Nematode matures in 
the ileum ; its eggs pass out and hatch in the soil ; the larvae are 
swallowed by the omnivorous cricket. In cultures the embryo was 
formed in two days. J. A. T. 
New Species of (Esophagostomum from a Rodent. — R. J. Ortlepp 
( Proc . Zool. Soc., 1922, 461-9, 6 figs.). Description of 0. xeri sp. n. 
from the caecum of a South African ground squirrel ( Xerus setosus). It is 
closely related to ffi'. cipiostomum , but the spicules of the male are much 
longer, the tail of the female is much more abruptly pointed, and the 
distance in the female CE. cipiostomum from the anus to the tip of the 
tail is greater than from the anus to the vulva, whereas in the new form 
just the reverse is the case. Larval stages occur in nodules in the wall 
of the caecum. • J. A. T. 
Lung Worm of Sheep.— John E. Guberlet {Proc. Amer. Soc . 
Zool. in Anat. Record , 1922, 23, 120). Infestation with the Nematode 
Dictyocaulus filaria takes place through the mouth. Lambs to which 
the parasite was administered in the food for twenty days showed 
infection in many organs, including the lungs. But the larval worms 
do not enter the blood stream at once, they remain for a while in other 
parts, e.g. mesenteric lymph-glands, and then migrate in the blood to 
the lungs. J. A. T. 
Control of Hookworm. — W. W. Cort, J. E. Ackert, D. L. 
Augustine, and F. K. Payne {Amer. Journ. Hygiene , 1922, 2, 1-16, 
2 figs.). Description of an apparatus for isolating hookworm larvae 
from considerable quantities of soil. It is possible to distinguish 
mature hookworm larvae, both sheathed and unsheathed, from other 
