234. CATALOGUE OF THE ZOOPHYTES OF 
proportion of its parts. Sometimes the head is elongated into a 
slender tube, sometimes contracted so as to become nearly globu- 
lar. The tentacles and body are equally subject to dilatation 
and contraction in their different parts. In many of its states it 
bears a considerable resemblance to C. nutans, from which, | 
however, it differs not only in its diminutive size, but in the 
gonophores being sessile (not pedunculated or branched as in the 
latter), and large in proportion to the size of the animal. The 
medusoid differs from that of C. nutans in having the umbrella 
rounded at the top; in other respects it is very similar. The 
following detailed description will show the character of this 
species more distinctly. 
Head sub-tubular, yellowish; the mouth conical, surrounded 
by about sixteen or eighteen short tentacles, forming two 
imperfect rows. A single circle of fifteen to twenty long 
filiform tentacles surrounds the base of the head, imme- 
diately above which the gonophores form another circle of 
urn—or bell-shaped bodies, in different stages of develop- 
ment; these are sessile, and in their more advanced state 
assume the perfect medusoid form, shewing lively motions 
of systole and diastole for some time before becoming 
free. The body of the polype is elongated, tubular, and 
tapering to a point at the base; it is soft and flexible, 
transparent white or yellowish, with opaque white lines. 
It is enclosed in a transparent filmy sheath, ending at 
the base in a gelatinous mass (coletoderm of Wright’), 
by which the animal is attached, though slightly, the 
pointed base of the fleshy body (ccenosarc) being free. 
Tubercles arise from the lower ends of the opaque white 
lines, which frequently enlarge into linear processes, 
whose use is not very apparent. They may possibly 
form additional organs of attachment, but in the speci- 
mens examined their ends were free. Length of polype 
3 to 2 of an inch. - 
Medusoid, with a rather deep, semi-globose, transparent 
white umbrella, having four yellowish radiating canals; 
three of them ending in a yellow bulb at the margin of 
