122 JESSE LE ROY CONEL 



mesovarium is approximately 15 mm. high along its entire course, 

 except at the ends, and its distal margin is not folded, but is 

 comparatively straight. Another old specimen has a mesovarium 

 which is 20 to 25 mm. wide, and its distal margin is also straight. 

 It is probable that, after losing the eggs, the distal margin of 

 the mesovarium tends to become straight again and the exces- 

 sive width caused by stretching where the eggs were suspended 

 is taken up by much transverse folding. As stated above, the 

 distal margin of the mesovarium does not take part in this folding. 

 The eggs seldom occupy more than the distal third of the mes- 

 ovarium, never extending entirely to the proximal margin. In 

 the adult animals they are distributed throughout the distal 

 half of the mesovarium, even to the outermost margin, but in one 

 of the young specimens (fig. 65) the most distal milhmeter of the 

 mesovarium is entirely without eggs. The smallest eggs are 

 always most distal, successively larger stages extending prox- 

 imally, the largest being most proximal (fig. 66). 



The eggs are comparatively evenly distributed along the length 

 of the mesovarium, except that there are few, if any, in the 

 most posterior 20 to 30 mm. Eggs larger than 10 mm. long, 

 when present, usually occur at fairly regular intervals along the 

 mesovarium from within 2 to 5 cm. of its anterior end to 3 to 

 10 cm. from the posterior end. Often from three to four or 

 five large eggs are found together in a cluster, due to the inter- 

 twining of the long strands of mesovarium by which they are 

 suspended. 



In each female which has normal eggs there are all grada- 

 tions of sizes of these from mere dots to those 2 mm. long. When 

 eggs longer than 2 nun. are present there are no intermediate 

 sizes between the 2 mm. eggs and the large ones, and all of the 

 latter are within 1 or 2 mm. of being of equal size. The largest 

 eggs found in any of the specimens measure 7 to 8 by 24 to 25 mm. 

 In immature females the smallest eggs are crowded close to- 

 gether along the entire distal margin of the mesovarium. In 

 older specimens the smallest eggs are much less numerous; 

 clusters of them are separated by more or less wide intervals. 

 Eggs 2 mm. long average approximately one for every 5 to 10 



