AND ON THE LAWS OF ITS FUNCTION. 297 



num (FLEMING), consists of a mass of nucleated cells. These cells are collected 

 in groups, in the interior of larger cells or vesicles. The nucleated cells measure 

 about 3.000th of an inch, and are filled with a light brown bilious fluid. 



The hepatic organ, situated in the midst of the reproductive apparatus, and 

 in the loop of the intestine of Phallusia mdgaris (FORBES and GOODSIE), consists 

 of a number of vesicles, and each vesicle contains a mass of nucleated cells. 

 These cells measure about 2.000th of an inch, and contain a dark brown bilious 

 fluid. 



The hepatic organ, in the neighbourhood of the stomach, in each of the in- 

 dividuals of the compound mollusk, the Alpidium-Ficus (LiNN^us), consists of 

 nucleated cells, which measure 4.000th of an inch in diameter, and contain in 

 their cavities a reddish brown fluid. 



The liver of Loligo sagittata (LAMAEK), contains a number of nucleated 

 cells, ovoidal and kidney-shaped, ranging in diameter from 1.000th to 3.000th of 

 an inch. These cells are distended with a brown bilious fluid. 



The nucleated cells in the liver of Aplysia punctata (CuviEE), measure from 

 1 .000th to 3.000th of an inch, and are full of a dark brown fluid. 



The ultimate vesicular caeca of the liver of Buccinum undatum, contain 

 ovoidal vesicles of various sizes. These vesicles contain more or less numerous 

 nucleated cells. The cells are full of a dark brown fluid. 



The hepatic caeca in the liver of Patella vulgata, contain vesicles about 

 1.000th of an inch in diameter. Each of these vesicles encloses a body which 

 consists of a number of nucleated cells, full of a dark fluid resembling the bile. 



The simple biliary apparatus, which surrounds the gastric portion of the in- 

 testinal tube of Nereis, contains nucleated cells, about 3.000th of an inch in dia- 

 meter, full of a light brown fluid. 



The hepatic cseca of Cardnus Mcenas contains cells full of a fluid of an ochrey 

 colour, along with numerous oil globules. The cells measure about 2.000th of an 

 inch. 



The hepatic caeca of Carabus catenulatus (FABEICIUS) contain, attached to 

 their internal surfaces, cells measuring about 1.000th of an inch in diameter. 

 Between the nuclei, and the cell walls, a brown liquid containing numerous gra- 

 nules is situated. 



The kidney of Helix aspersa (MULLEE) is principally composed of numerous 

 transparent vesicles. In the centre of each vesicle is situated a cell full of a dead 

 white granular mass. This gland secretes pure uric acid. 



The ultimate elements of the human liver are nucleated cells, measuring 

 about 1.000th of an inch. Between the nucleus and the cell-wall is a light 

 brown fluid, with one or two oil globules floating in it. 



The vesicular caeca, in the testicle of Squalus cornubicus, contain nucleated 

 cells which ultimately exhibit in their interior bundles of spermatozoa. 



