30 THE DISCOBOLI. 



large, and has two lobes, of which the left is the larger, thicker, and 

 broader, while the right is small and short, little more than a continua- 

 tion of the left, from which it is separated, in the older specimens, by a 

 shallow indentation of the hinder margin. When the female is heavily 

 burdened with eggs, the left lobe is crowded downward. The gall bladder 

 is small and rounded ; its duct opens into the intestine near the pylorus. 

 The spleen is small, and subject to considerable variation in shape. Ante- 

 riorly the kidneys are large, thick, and separated ; posteriorly they are 

 most often fused. The ureters join before reaching the 'bladder, the 

 contents of which pass out through the anal papilla behind the anal 

 aperture. Unlike that of the cottoid, the bladder is simple, without 

 horns. The testicles are elongate and separate ; their ducts meet that 

 from the bladder on entering the inner wall of the abdomen. Each 

 ovary approaches a kidney-shape ; posteriorly the two unite and discharge 

 by a common duct. 



The discovery of considerable amounts of sea mosses, weeds, and grasses, 

 with portions of crustaceans and small fishes in the stomachs, establishes 

 the fact that Cyclopterus, as was anticipated from the peculiarities of the 

 intestine, is in the habit of feeding on vegetation. 



Brain. (Plate VIII. Figs. 1-3.) — In comparison with the entire bulk of 

 the animal, the brain of the Lump is very small. A specimen measuring 

 twelve inches in length has a brain that, including the olfactory lobes 

 and the rhomboidal sinus, measures about half an inch in length, live 

 sixteenths of an inch in width across the optic lobes, and one fourth of 

 an inch in depth, to the bottom of the hypophysis. Its general features 

 are those of the Cottoid ; hemispheres and cerebellum are smaller than 

 the optic lobes, and the entire brain is short, as if crowded together 

 more than in the Liparids. Excepting the wider separation of the olfac- 

 tories, the shape of the brain and the distribution of the nerve roots 

 are not greatly different from those of Cottus groenlandicus and C. octo- 

 decimspinosus. Figures 1 and 3 represent the olfactory nerves as crooked 

 near the lobes ; in other specimens there is no such bend. At the for- 

 ward extremity the olfactory nerve is distributed, in the nasal sac, in a 

 rosette similar to that of Liparis Agassizii (Plate III. Fig. 4), except in 

 that it has wedge-shaped intrusions between the outer ends of the rays 

 reaching from the centre, which give it more resemblance to a fungoid 



