THE ANNALS 
MAGAZINE OF NATURAL HISTORY, 
[THIRD SERIES.] 
No. 108. DECEMBER 1866. 
LV.—On the Structure and Habits of Anthophysa Miulleri, Bory, 
one of the Sedentary Monadiform Protozoa. By H. James- 
Crark, A.B., B.S.* 
Dvrine the last five years, and more especially within the 
latter eighteen months, I have been engaged largely upon an in- 
vestigation of the relations of the monadiform animalcules to 
the zoospores of the true Alge; and of all the numerous in- 
stances of the former that I have more or less thoroughly stu- 
died I have never met with one which could be said to bear but 
very moderate resemblance to the latter: I refer to the true Alge ; 
I scarcely need add that I mean by this to except those doubtful 
forms which seem to be related to Volvox and Gonium, such as 
Pandorina, Protococcus, Stephanosphera, Chlamidococcus, &c. 
Those who have become accustomed to these creatures, and 
have learned to look upon them, through long years of patient 
study, as old and familiar friends, know well the value of using 
the best lenses that the opticians of the present day can afford, 
and never doubt for a moment the utter worthlessness of an 
opinion which is founded upon a few fitful glances through a 
so-called ordinary working microscope. There is no other group 
of animals which so essentially seems to need the prolonged de- 
votion of a specialist as the Protozoa—and above all, the lower 
members of that grand division. ‘To write a monograph upon 
any single one of these flagellate forms may seem like devoting 
a volume to the structure and phases of a dot ina sunbeam ; but 
no good microscopist need be told that the optical instruments 
of the present day are no less efficient than was the scalpel in 
the hand of Cuvier when he displayed to the world the organi- 
zation of the larger and more elevated animals which he found 
on the southern shores of France. 
Moreover it is particularly desirable that elaborate investiga- 
tions should be made, and unstinted minutiz set forth in illus- 
* From Silliman’s American Journal for September, 1866, 
Ann. &§ Mag. N. Hist, Ser.3, Vol. xvi. 30 
