190 
C. H. MARTIN. 
doubt as to how many of the original species of the genus 
Bodo may not turn out to be Prowazekia ; (2) the recent 
attempt made by certain authors, on the assumption that the 
parasite in the receptaculum seminis of snails is identical 
with the true Trypanoplasmas, to place the intestinal Trypano- 
plasmas in the genus Cryptobia. 
It appears to me that the first step in surmounting these 
difficulties must be made by a careful study of the genus 
Cryptobia, the parasite of the snail. 
In Friedriclds original paper clear division stages were 
shown, and these were all of a type which seems very different 
from that found in true Trypanoplasmas. It does not seem 
that the more recent account of the division of this form by 
Jollos can be regarded as replacing Friedrich’s original 
account, since it seems to me more than probable that many 
of the stages figured by Jollos do not represent division at 
all, and in any case his series is very incomplete. 
On the whole, it seems safest at present to assume that 
Cryptobia is nob a true Trypanoplasma, though the only 
distinctive feature appears at present to be the absence of 
distinct undulating membrane in Cryptobia. It seems 
probable, however, from Friedrich’s paper that other dis- 
tinguishing features would be found by a careful study of the 
other stages of this animal. 
In this connection it is important to remember that Max 
Kuhn, who has recently studied' these parasites in a very 
hirge number of snails, has also expressed some doubts as to 
how far they can be regarded as true Trypanoplasmas Yid 
Die Trypanoplasmen .und deren Yerbreitung in einheirnische 
und auslandischen Schnecken,’ p. 70) : 
Die letztere die den Kandfaden einer Undulirende 
Membran darstellt ist sehr viel lockerer mit dem Korper 
verbunden wie bei dem Trypanosomen. So dass sich haufig 
auf gefarbter Praparaten die Randgeissel mehr oder wenig 
frei zeigt und somanchmal scheint als ob hier eiiiYertreter 
der Gattung Prowazekia vorliegt.” 
If this view that Cryptobia differs from the true Trypano- 
