NICOTHOE. 
303 
thence proceeds in a curve round that part where the 
appendage proceeds from the body, into the middle por- 
tion of the same, and where it evidently has its issue on 
the same side where the sexual aperture occurs. The latter 
organ, which is wont to contain a somewhat thickish fluid, is 
not, apparently, an exudation of the ovary, but something 
similar to those organs in the Lerneadse and Cyclopidae, 
which, in the formation of these clusters of eggs, give 
forth a glairish fluid, soluble in water, which I have more 
minutely described in a treatise on Dechelesthium sturionis, 
and Lernceojpoda stellata , and have called it the cementing 
organ. * 
The intestine is a simple canal, which does not show 
any appearance of an enlargement indicating a stomach. 
In the fifth segment we find the two openings of the 
sexual apparatus. 
The feet are very small, and the first four pairs are all 
alike, consisting of a basal joint of comparatively large 
size, and two branches, each composed of three short 
articulations, furnished with tolerably long setae. The 
fifth, or rudimentary pair of feet, is extremely small. It 
is formed of two somewhat compressed joints, of nearly 
equal length, the terminal one being provided with five 
pretty long bristles. 
The abdomen is slender, and is divided into five joints, 
which become gradually smaller as they succeed each 
other. The last is slightly lobed at the extremity, and 
sends off two long, thick, simple setae or bristles, and 
several very much thinner and shorter ones. 
The external ovaries are very large, of an oval shape, 
of a rosy colour, and contain a very great number of ova. 
They take their origin from the fifth ring of the thorax, 
where the opening of the sexual organs has been already 
described to exist. 
The Nicothoe is found attached, often in considerable 
numbers, to the gills of the common lobster. The animals 
* Nov. Act. Ces. Acad. Nat. Cur., xx, 102, 1843. 
