374 / / 
Opsanus tau, female, 
x 
Tautogolabrus adspersus, maie. 
One out of thirteen eggs was impregnated in the single experiment. 
The rate of cleavage was the same as in the above cross. 
Opsanus tau, female, 
x 
Menidia notata, male. 
Thirteen out of seventeen eggs were impregnated. None of the eggs 
were polyspermic. ‘The cleavage rate was the same as*the Opsanus X 
Fundulus cross listed above. 
The reciprocals of the above named three crosses with Opsanus tau eggs 
were attempted but without success. This was doubtless due to the unripe 
condition of the Upsanus tau milt, since I was also unsuccessful in obtaining 
normals. 
In addition to the crosses detailed above the following were also ef- 
fected (See Table 9) : 
Fundulus heteroclitus 2 > Apeltes quadracus -. 
Tautoga onitis 2 * Tautogolabrus adspersus <. 
Tautogolabrus adspersus 2 X Tautoga onitis <. 
Coregonus clupeiformis 2 > Argyrosumus artedi -. 
Argyrosomus artedi 2 & Coregonus clupeiformis 7. 
Cristivomer namaycush 2  Salvelinus fontinalis -. 
