158 KENDALL: NEW ENGLAND SALMONS. 



Gravid ovaries are never of the same length, one, usually the left, always the longer. 

 Each ovary is suspended by a mesovarial fold extending from its respective side of the 

 aid bladder somewhat inward and downward to the inner surface of the ovary whence 

 it forms the walls of a somewhat boat-shaped ovary with obliquely crosswise ovigerous 

 laminae, from which, when ripe, the ova, escaping from the enveloping capsules, lie in 

 the groove formed by the inclined edges of the laminse and the mesovarium within. 



The line of the air bladder attachment of the mesovarium extends gradually inward 

 until it joins that of the dorsal intestinal mesentery near its posterior terminus. The 

 ovarian covering continues on each side as a troughUke fold until it unites with its 

 opposite and forms a common trough on the upper surface of the intestine, extending 

 from the posterior terminus of the mesentery to near the genital pore, where it widens 

 and becomes attached to each side of the abdominal wall.^ This arrangement forms a 

 troughhke oviduct from each ovary open above save for the peritoneal covering of the 

 air-bladder. Consequently the ova do not 'fall into the abdominal cavity before ex- 

 trusion.' 



Genus Cristivomer is restored to the lake trout which was called Salvelinus namay- 

 cush. While the vomerine character alone does not always distinguish it, the forms 

 of the mesethmoid and maxillary bones do. The mesethmoid is comparatively long 

 and narrow, scarcely at all fan shaped, while in all other salmonids it is comparatively 

 short and more or less broadly fan shaped. (Kendall 1919, p. 78-81.) The maxillary is 

 relatively long, and subcyUndrical and flattened only near its posterior end. The 

 supplementary maxillary bone is also long and narrow. These characters appear to be 

 of generic value, particularly when taken in combination with other usually distinguish- 

 ing characters. 



'This is the 'peritoneal trichter' of Weber (1886)j 



