548 Records of the Indian Museum. [VoL. XI, 
The everted portion of a discharged nematocyst is some three 
to three and a half times the length of the nematocyst, and con- 
sists of a smooth-walled basal bulb, a second and smaller bulb fur- 
nished with about four whorls of barbs of which the proximal 
whorl contains three large individuals, while those of the distal 
whorls are more numerous and insignificant. From the second 
bulb proceeds the filament which throughout its length is armed 
by a close spiral of exceedingly minute barbules ascending in a 
contra-clockwise direction (see text-fig. 1B). 
TEXT-FIG. 2. 
Lesser type of cnidoblast (microcnide) from nodal cell. 
A. Undischarged cnidoblast and its connections 7 situ ( X approximately 
4000 diameters). 
B. Discharged nematocyst (similarly magnified). 
Lettering as in text-fig. 1. 
The second and smaller type of cnidoblast—microcnide—is of 
simpler structure. The nematocyst is similar in shape but is ap- 
proximately half the Jinear dimensions of that of the large type, 
4u or 5u by 3u. The cnidocil is stouter and longer than in the 
macrocnides, and although the general arrangement of cytoplasm 
is the same the cytoplasmic coat is drawn out into an elongate oval 
shape to include a very large nucleus which lies against the proxi- 
mal wall of the nematocyst. ‘The nucleus varies in shape, but its 
inner surface is always closely moulded upon the nematocyst wall, 
a 
