212 H. H, NEWMAN, 



During the last week of July the fish was kept under close 

 observation. On several occasions it showed a type of behavior 

 distinctly male-like. It followed the female about and repeatedly 

 made movements that seemed to indicate a weak attempt at 

 spawning. Of this I could not be positive, but in other respects 

 the behavior was that of a courting male. It would have sur- 

 prised me greatly had there been an exhibition of actual spawn- 

 ing, for, as has been said, F. majalis seldom spawns in captivity. 



On the last day of July the writer was compelled to leave the 

 laboratories and the fish was killed and carefully preserved in 

 formalin. 



An examination of the formalin-preserved sex gland revealed 

 the fact that it was a composite gland, containing about five per 

 cent, of testicular tissue, slightly immature, and imbedded in a 

 mass of immature and stale ovarian tissue. The testicular tissue 

 occurred in minute lumps, principally near the posterior end of 

 the gland. Although distinctly testicular in structure, these 

 small masses showed a less typical structure than that of normal 

 testis, being less compact and interspersed with connective tissue. 

 The color, size and general appearance of the whole gland was 

 that of a preserved testis, there being no yellow color present as 

 is the case in normal ovaries after the close of the spawning 

 season. 



A further close examination of the body pattern showed that 

 the cross banding on right and left sides was not equally perfect, 

 that of the right side showing the character in as perfect a form, 

 if less distinct, as in a typical male, that of the left being par- 

 tially broken into shorter bars, the beginning of a tendency on the 

 part of the cross-banded pattern to break up into the rows of 

 spots that furnish the material for longitudinal stripes. 



The photograph of the specimen taken from the right side 

 shows the pattern far less distinctly than in life on account of the 

 fact that scales and skin, rendered opaque by the preservative, 

 obscure the underlying markings. In other respects the illus- 

 tration (Fig. 2) is a faithful representation of the conditions. 

 Photographs of the left side failed entirely to bring out the points 

 desired, so it was necessary to insert a camera drawing as the 

 best substitute. This drawing (Fig. 3), showing the less perfect 



