TRANSLATIONS. 
FurtHer Oxsservations on the DrveLopmMent of PEntas- 
TOMUM THNIOIDES. By Rup. Levucxarr. 
(Henle and Pfeufer’s ‘ Zeitsch. f. rat. Medicin,’ 3 ser., Bd. iv, p. 78, 1858.) 
Tue readers of this Journal will remember from my first 
paper* that I had commenced a series of experiments, m 
order to decide the question whether the Pentastomum den- 
ticulatum, which occasionally occurs as a parasite im man, 
be a fully developed animal, or whether, as might be con- 
cluded from certain reasons, it merely represents the larval 
condition of the well-known Pentastomum tenioides which is 
found infesting the nasal cavity of dogs. To this end I had 
infected three dogs with P. denticulatum, not more than a 
few millimetres in size, by the introduction directly into 
their nostrils of several dozen of these parasites, procured 
from the abdomen of a rabbit. 
The results of these experiments have been as yet only 
partially made known. It has been stated that I detected 
in one of those dogs, killed six weeks after infection (on the 
17th February, 1857), three examples of a Pentastomum, 
which, notwithstanding its insignificant size (8—10 mm.) 
and incomplete development, could be recognised as Penta- 
stomum tenioides. As I stated in a supplement to that com- 
munication, a far more convincing result was obtained in a 
second dog. In this case there were found (on the 20th of 
June, about seventeen weeks after the commencement of the 
experiment) not less than thirty-nine Pentastomata, of whose 
agreement with the usual P. tenioides the smallest doubt 
could not be entertained. About the half of these examples 
were males; they were fully developed (15—16 mm. long), 
and had also to a certain extent accomplished the copulative 
function, as might be concluded from the circumstance of the 
seminal pouches of some of the females being filled with 
semen. The females were larger than the males (up to 
26 mm.), though they had neither attained full growth, nor 
* <Jahrg.,’ 1857, s. 48—60. “ Pentastomum denticulatum, der Jugend- 
zustand yon Pent. tentoides.” 
