W. T. PROUT
giving the appearance of a fine canal. About the junction of the anterior iiUh with the posterior four fifths, there is a clear spol free from granules, evidently the V shaped spot of Manson. I could not however satîsfy inyself as to this particular shape.
The embryo is not sheathed.
The follôwing slalement gives in a labular form, the cliaracleristics of the embryo of this, in comparison with those of the blood Worms airealdy known :
FILARIA DIURNA
FILARIA NOCrURNA
FILARIA PERSTAKS
PRESENT FILARIA
LeDgth.
Breadth.
7jjl5
7îi5
4{jl5
5ti
Sheath.
présent
présent
absent
absent.
Head.
Gephalic armature siX'lipped.
PapUlated.
Rounded.
Tail.
Sharp
Sbarp 1/5 taper
Truncated.
Sharp taper 1/5.
B<)dy.
Central granular aggregation.
III defined aggregation.
No central aggregation.
Central granular aggregation.
V spol.
présent
présent
none.
clear spot.
It would appear then to resemble F. noctuma and F, diuma in several points wilh the exception that it is smaller and possesses no sheath.
The above description is that of a Filaria which, so far as I am aware, has not hitherto been described in détail, if at ail. Making allowance for shrinkage conséquent on the methodex of préparation, and taking into account the geographical facts, the clinical characters of the tumours, and the anatomical features of the embryos, a diagnosis of the Worm named by Leuckart Fikiria. volvulus is highly probable.^Whether, judging from its superficial position, this Filaria complètes its cycle by ulcération of the tumour, and sheds its embryos into the outer world in the same way as the Guinea-Worm does; or whether the embryos gain entrance to Ihe blood, and follow the usual cycle in the Mosquito, are points which require furlher observation.
OBSERVATIONS ON FILARIA VOLVULUS 307
The former is, in my opinion, unlikely, and when we remember the hundreds of tbousands of embryos wbieh tbe adult Worm is seen to contain, we can uaderstand how even a single Worm can give rise to a very marked degree of infection of the biood. The removal of the tumour in tliis case may hâve been the cause of the absence of embryos from the blood, and if such is the case, a very important indication for treatment is given for those cases where the adult is situated superficialiy in glands or otherwise. *
Lastly, I may be permitted to take this opportunity of expressing my thanks to Professor Hamilton, for very kindly allowing me Ihe use of the pathological Laboratory, Aberdeen, and to Di^ Manson for his kind and valuable suggestions.
