Kendall. — Anatomical Facts 47 



tal pore widens and becomes attached to the abdominal wall on 

 each side, thus forming a sort of shelf in front of the genital 

 pore, or what might be likened to a funnel formed by the union 

 of the expanded lateral edges of the trough and the peritoneum 

 of the abdominal cavity above. Sometimes near the posterior 

 terminus of the mesentery, particularly in the case of the longer 

 left ovary, the lower edge of the pendent mesovarium extends 

 to form the side of the trough on top of the intestine, while a 

 membranous flap, which narrows to the posterior end of the 

 tapering extended ovary, lies on or against the trough. 



This trough serves as an oviduct, along which the ova pass 

 from the ovaries to the genital pore. The outer walls of the 

 ovary are supported in position partly by the shape of the 

 ovary and the crosswise laminae, tense with eggs, and by the 

 abdominal wall. The sides of the trough are also supported 

 by the abdominal wall. 



GrayHng, whitefishes, and others, excepting in the absence 

 of the ventral mesentery, are essentially the same as the sal- 

 mons, trouts and chars. So far as the structure and mem- 

 branes of the ovaries are concerned, the smelt exhibits about 

 the same arrangement as the fishes previously mentioned. The 

 mesovariums continue also from the oviducts in a similar 

 manner, but owing to the relative size and situation of the 

 ovaries, the oviducal structure is somewhat different, as des- 

 cribed by Huxley. 



The left ovary is the larger and is anterior to the right or 

 much smaller ovary, as stated by Huxley, but contrary to his 

 statement, the ovaries are not semioval plates with vertical 

 laminae on the outside, but are somewhat as I have described 

 in the case of the Salmonidse, with the difference that each 

 ovary might be regarded as a comparatively deep boat-shaped 

 organ with the bottom bent upward so as to form a groove in 

 which the alimentary tract lies. The anterior or left ovary 

 bends up to the right and the posterior or right ovary to the 

 left. The continuation of the mesovarium and ovarian cover- 



