NOTES AND MEMORANDA. 249 



lengths of intestine were seen extending right to the posterior 

 termination of the cavity. Beneath these, but partially ex- 

 posed at the ventral edge of the cavity, was the right ovary, 

 which was four and a half inches long, three quarters of an inch 

 broad. It was yellow in colour, and almost mature, the ova 

 being visible to the unaided eye as separate granules. The 

 ovary did not reach posteriorly to the end of the cavity by 

 about an inch. Anteriorly it did not extend into the un- 

 divided anterior portion of the body cavity, the oviduct, 

 which was about three quarters of an inch long, passing for- 

 wards and ventrally to the genital opening. 



The cavity of the left side was then opened. In it there 

 was no portion of the intestines ; it contained the left ovary, 

 which was five inches long and half an inch broad, longer 

 and narrower than the right. At the anterior end of the 

 cavity was seen the left kidney, a large portion of which 

 lies in this posterior extension of the body cavity. In the 

 undivided portion of the body cavity on the left side is seen 

 nothing but the left surface of the liver. The two posterior 

 extensions of the body cavity are, of course, completely 

 divided by a thick median partition containing the inter- 

 spinous bones belonging to the anal fin. 



In a male which was fifteen and a half inches long, 

 including the tail, on opening the posterior extension of the 

 body cavity on the right side, the same four lengths of 

 intestine was seen, and no genital organ was visible while 

 these were undisturbed. The testis was found beneath these 

 intestines, at the anterior end of the cavity. It was a flat plate 

 with an entire outline lying on the partition which separates 

 the right posterior cavity from the left. It did not extend 

 in front of this partition into the undivided body cavity, its 

 vas deferens passing forwards and ventrally to the genital 

 opening. The testis was one inch long and half an inch 

 broad. On the left side the posterior body cavity was short, 

 only about half the length of the corresponding cavity on 

 the right. It contained no organs except the left kidney 

 which extends back into it. The left testis was smaller 

 than the right, being three quarters of an inch in length ; it 

 lay with its longer axis transverse to the axis of the cavity, 



VOL. I, NO. IL. 17 



