410 
REVIEW. 
in the same tissue with the female. Embryos cannot withstand 
the slighest dessication.—(C. W. S.) 
Railliet. Recherches sur la transmissibilit^ de la gale du chat et du lapin due au 
Sarcoptes minor , Fiirst. 
Railliet was unable to transplant this parasite from rabbit 
to rabbit, or from rabbits to cats, rats or dogs ; the trans¬ 
mission from cat to cat was very easy, but from cat to rabbit 
it was more difficult; when rabbits had themselves contracted 
the parasites from cats they could transmit them to other 
rabbits.—(C. W. S.) 
Railliet. Observations sur la resistance vitale des embryons de quelques Nema¬ 
todes (Compt. rend. d. 1. Soc. d. Biol. 1892 p. 703, 704). 
Raiiliet gives a remarkable case of the infection of two dogs 
with Uncinaria trigonocephala and Trichocephalns depressiusculus. ■ 
Eight years ago, he conducted some experiments on the de¬ 
velopment of these nematodes, and ever since that time every 
dog which he has placed in the kennel in which those experi¬ 
ments were conducted have become infested with these 
worms. The kennel has been cleaned very thoroughly a num¬ 
ber of times, but the embryos have evidently not been entirely 
destroyed, for quite recently two more dogs (after eight years 
has elapsed), have become infected with the same parasites. 
This, of course, does not mean that they were infected with 
embryos which have lived eight years, but the original infec-1 
tion was in 1884, and the dogs used since then have in turn 
become infected, and then have reinfected the abode. 
Railliet recommends sulphuric acid as a disinfectant in 
such cases. 
He further observed the resurrection of embryos of Stron- 
gylus rufescens which had been dried for sixty-eight days.— 
(C. W. S.) 
R. Blanchard. Sur les Oestrides Americains dont la larve vie dans la peau de 
1’Homme (Ann. d. 1. Soc. Entomol. d. France, 1892, pp. 109-154). 
Blanchard has brought together a large number of cases 
of oestrus-larvse, found under the skin of man; he further 
figures and describes ten larvse in his possesion which were 
taken from men. His general conclusions are that four 
American species of oestrides belonging to the genus Derma- 
