88 T. C. Hilgard—Infusorial Circuit of Generations. 
the continent, and at other points in the States and Territories — 
of the United States, and for giving notice on the northern | 
akes and on the sea coast by magnetic telegraph and marine | 
signals, of the approach and force of storms.” < 
By a general order of March 15th, Brevet Brig. Gen. Albert 
J. Myer, the Chief Signal Officer of the army, was charged with 
the duty of the execution of the preceding law, and has there- 
fore organized in connection with the Army Signal Office, the | 
“Division of Telegrams and Reports for the Benefit of Com- 
eree;" 
m . 
4 
Washington, May 1, 1871. 
Art. XIL—Injusorial Circuit of Generations ; by Turon. 0. 
HILGARD. 
[Continued from page 25.] 
A DIRECT onward evolution of Vorticella I had occasion to 
realize on the fetid scum cuticle of a putrescent aquarium. 
All the Vorticellae which, in dense clusters, lined thé under sur- 
face of that membrane, or animal pellicle, were found to elongate — 
into a sort of roughish, but very hyaline, cucumber-shaped — 
form; each “ cucumber ” at first crowned with a true vorticellan 
limpid, empty and now entirely flattened, ligulate or sandal- 
shaped body tears loose as a young fluttering, pallescent Oxy- 
tricha (Pelionella), or so-called “hackle-animalcule:” darting by 
the jerks of its stiffish marginal bristles, and by the constant 
“plying” of the long-barbed, ciliate slit effecting its slower 
progress. It never revolves, but often crawls; (both in con- 
tradistinction to the fleeced, revolving and vacuole-propelled — 
“Paramecium ” form. 
This is probably the “ short-line” development, of Oxytricha, 
directly from the germinal clouds or the parasite of Chlamydo- 
coccus, through Vorticel I have no good figures to refer to, 
since even the detailed ones of Ehrenberg, in Trans. Berlin Acad. 
ey oe 
5 
1 >, a great ma ecies 
Sap. sat. We have naturally to reject all, of which the mode of developm 
remains unknown, as indicating a false standpoint. 
