62 MR. SWALE VINCENT ON THE 



completely concealed, however, by kidney-substance. The body of the right side was 

 rounded and about 2 mm. in diameter, the left was about 3 mm. by 1'5 mm. In 

 another specimen, however, I found them placed on the dorsal aspect of the kidney at 

 about the middle of its length, the right being slightly smaller than, and somewhat 

 anterior to, the left one. 



Frey says that in this fish the suprarenals are placed one behind the other. This is 

 certainly not the rule, but it may be so in some cases. 



I have examined several specimens of John Dory (PI. XII. fig. 36). There were 

 usually two suprarenals, one on each side of the middle line, but occasionally the body 

 of one or other side has been represented by two smaller bodies. Sometimes they are 

 placed side by side, sometimes one behind the other. They are always near the 

 junction of the posterior crura of the kidney. They are mostly white or slightly 

 iridescent and smooth, being enclosed in a firm fibrous capsule. They are rounded and 

 situated on the spinal surface of the kidney. This is noteworthy, as I have always 

 found them on the ventral surface in Scomber. Another point of distinction between 

 the two genera is that in the John Dory they are not imbedded in the kidney- 

 substance ; they always lie within the posterior quarter of the kidney. 



Blennidje. — In a specimen of Annarldchas lupus (Pi. XII. fig. 37), 115-5 cm. in 

 length, I found two suprarenals, situate 5 cm. from the hinder end of the kidney. 

 The left was on the ventral surface of the kidney, nearly round, and 5 mm. in 

 diameter. The right was on the dorsal or spinal surface, and, being the larger, its 

 central point was posterior to that of the left, as their anterior ends were on the same 

 level. This right body was oval in shape and 1 era. by '5 cm. The organs were 

 partly imbedded in the kidney-substance. 



Pediculati. — In the Angler {Lophius piscatorius, PI. XII. fig. 38), in a fish of 

 54 cm. in length, I found five suprarenals. The chief pair were situated on the 

 ventral surface of the kidney, about 1 cm. from its hinder end. The right was 3 mm. 

 in diameter, the left 3-5 mm. They were of a pale flesh-colour and marbled with 

 very fine blood-vessels. 



In addition to these two, there was on the right side a body about 125 ram. in 

 diameter, just at the hinder extremity of the kidney, where the ureter springs from its 

 substance ; again, just anterior to it is another, about one-third its size. On the left 

 side there is also a second body, about 1-5 mm. by -75 mm., situated midway between 

 the " chief" body and the end of the kidney. 



The larger suprarenals were more or less imbedded in the substance of the kidney. 



MuGiLiDJi. — In Muc/il capita (PI. XIII. fig. 39), 55 cm. long, I found one suprarenal 

 capsule of large size (6 mm. by 3). It was placed about 4 mm. from the posterior 

 extremity of the kidney, and, being imbedded in the kidney-substance, its large size 

 enabled it to be seen either from the spinal or the ventral surface (PI. XIII. fig. 39). 



In another example, 35 cm. long, there were two suprarenal bodies, on the spinal 



