ACALEPEUE. 
2fi9 
Sections more or less distinct, and terminated by two long filiform 
tentacles issuing from the base of the zoophyte and fringed on the 
sides. “ It is,” says Gosse, “a globe of pure colourless jelly, about as 
^8 as a small marble, often with a wart-like swelling at one of its 
poles, where the mouth is placed. At the other end there are minute 
offices, and between the two passes the stomach, which is flat or wider 
111 one diameter than the other.” Oydippa pilens, found abundantly 
m the spring on the Belgian coast, is so transparent that it is 
freely visible in the water, where it seems to be a living, moving 
cr ystal. C. densa, which abounds in the Mediterranean, is of a 
Cl 'ystalline white, with rows of reddish cirrhi, terminating in two 
facies, much longer and coloured red ; it is about the size of a 
azel-nnt, and phosphorescent. Within the clear substance of the 
Oydippa, on each side of the stomach, there is a capacious cavity, 
"dfich communicates with the surface, and within each cavity is fixed 
tentacle, of great length and very slender, which the animal can 
at pleasure shoot out of the orifice and suffer to trail through the 
' Va ter, shortening, lengthening, twisting, twining, or contracting it into 
a liny ball at will, or withdrawing it into its cavity, short filaments 
)e mg given off at intervals over the whole length of this attenuated 
^'Prite thread-like apparatus, each of which can also be lengthened 
° r s Wtened, and coiled individually. These proceed only from one 
® lc le of the thread-like tentacle, although, at a casual glance, they seem 
0 Proceed now from one side, now from the other. 
Callianira. 
■11 lie Callianira form a sort of connecting-link between the Beroes 
^ the Oestidee. Their bodies are smooth and regular, vertically- 
igated, compressed on one side and as if lobated on the other ; in 
stance they are gelatinous, hyalin, and tubular, obtuse at both 
x remities, with buccal openings between the prolongations of the 
^ e > and two pair of conical appendages resembling wings, capable 
ra eX P >ans i° n i on the edges of which two rows of vibratory cilia are 
ged. A. great transversal opening presents itself at one of the 
t r(irn dies, a small one at the other. The animal is furnished with 
0 ^ranching tentacles, but without cilia. 
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