58 ME. SWALE VINCENT ON THE 



In another Salmon, a young fish only 47 cm. in length, I found three suprarenals, 

 placed, as in the former specimen, at about the middle point of the length of the 

 kidney and on the spinal surface. There were two chief ones, right and left respec- 

 tively, situated each about 1 mm. from the middle line, the left one being about 3 mm. 

 by 1'5, the right about 5 by 1'5, but irregular in shape. About 1 cm. anterior to 

 these two is another about 1 mm. by - 5 mm. on the left side. 



In a specimen of Salmo trutta, 58 cm. long, with a kidney of 26 cm., I found the 

 suprarenals seven in number. There were six on the spinal and one on the ventral 

 surface, all small. They were pale pink, roundish or oval bodies, and were partly 

 imbedded in the substance of the kidney. This fact, coupled with the presence of one 

 on the ventral surface, suggested to me that some might be completely buried in the 

 substance of the kidney. This, however, I found not to be the case. The most 

 anterior one was very small, and was situated 10 cm. from the anterior end of the 

 kidney ; the rest were scattered throughout the succeeding 4*25 cm. The one on the 

 ventral surface was 12-5 cm. from the anterior extremity of the kidney. None of the 

 bodies were more than 3 mm. in diameter. 



In Osmerus eperlanus (PI. XL fig. 14) the suprarenals were represented by two 

 miliary bodies about the size of a pin's head, projecting from the hinder end of the 

 kidney, placed one behind the other (s.r.). 



Among the Cyprinidae I have examined : — 

 Leuciscus rutilis. (PL XI. fig. 15.) Leuciscus vulgaris. (PI. XI. fig. 17.) 



„ cephahs. (PI. XI. fig. 16.) 



The suprarenals are usually two ; but in a specimen of L. vulgaris there were four 

 (PL XI. fig. 17, s.r.). They are usually rounded in this family. 



As to position, they are usually in the posterior fourth of the kidney, but they may 

 reach as far forward as the junction of the posterior with the middle third. They are 

 usually placed one on each side of the middle line, but are often very close to it. 

 They are on the spinal surface or the edge of the kidney. 



In the fishes of this family I have examined the bodies have never been more than about 

 2 mm. in diameter, and they are often buried to some extent in the kidney-substance. 



c. Anacanthiki. 



GADiDiE. — In this family I have investigated : — 

 Gadus morrhua. (PL XL fig. 18.) 

 „ aglefinus. (PL XI. fig. 19.) 

 „ merlangus. 

 „ virens. 



In the Gadidee there is considerable variation in number and size of the suprarenals, 

 although their shape is nearly always rounded. 



As for number, two must be regarded as the rule, but there is even more variation 



Merluccius vulgaris. (PL XL fig. 20.) 

 Molva vulgaris. (PL XI. fig. 21 .) 

 Motella tricirrhata. 



