1880. ] Zoölogy. gii 
takes its rise, but it is. composed of the same kind of material. 
Many of the tubes show the rim of a trumpet projecting from the 
sides of the former, a little above the middle, and of the same 
form as the terminal rim, showing that this, like the form des- 
cribed by Mr. Wright from English waters, may stop building its 
tube for a time and then recommence. 
The adult animal, tube and all, when fully extended, will meas- 
ure s'5 ofan inch in length. It is of the same color as Stentor 
ceruleus, but has the power of elongating and twisting itself as 
greatly as S. reset. The peristome is quite unlike that of Freia 
ampulla and bears a strong likeness to the blades of a pair of ob- 
stetrical forceps. The blades are deeply grooved, forming a deep 
ciliated demi-canal with parallel sides, and at the junction of their 
bases lies the spacious, twisted and richly ciliated pharynx, which 
is bounded dorsally and ventrally by the prominent folds which 
unite on either side with the long, curved lobes of the peristome. 
As in F. ampulla a finger-shaped knob, which may sometimes be 
extended as a long flexible appendage, surmounts the apices of 
the lobes of the peristome. There is a small basal disc as in 
Stentor and the ectosarc is traversed as in that genus by parallel 
granular bands, regarded as muscle fibers by some writers. The 
usual food balls and vacuoles are present, and I was enabled to de- 
fine sharply the endosare from the ectosarc, and clearly see the 
long-beaded nucleus. The tube or ribbon-secreting organ de- 
scribed by Wright I was unable to discover. 
When fully extended the basal portion of the animal becomes 
attenuated to a thin bluish filament, which widens toward the pe- 
ristome, where the body is over half as thick as the diameter of 
the tube. When fully retracted and resting, the animal resembles 
in its oblong shape a retracted and resting Stentor, and measures 
about y's as long as when fully extended. The agreement of this 
form with F. producta is in every respect so complete, that I have 
no doubt whatever that they are the same. The ribbon makes 
from four to twenty-four turns in specimens of different ages, and 
the turns are to the right. Z. stylifer Wright, is probably only a 
variety of this species.— Fon A. Ryder, Sept. 34, 1880. 
RHIPIDODENDRON SPLENDIDUM.—This remarkable flagellate 
monad, which builds a fan-shaped test composed of radiating 
tubes in which the individuals live and divide, is not uncommon, — 
attached to the leaves of Sphagum, from ponds in the neighbor- 
hood of Woodbury, N. J., from whence I have obtained it in 
material furnished me by Mr. W. P. Seal. Prof. Stein first de- 
scribed it from Bohemian waters.— 7. A. Ryder. 
A PALE VARIETY OF POLYXENES FASCICULATUS.—I have just 
picked up some specimens of Polyxenes that seem to me unusu- 
ally pale in color. I find them under chips, sticks and bits of 
bark within forty feet of the sea beach, at St. Jerome, St. Mary’s 
