File:FMIB 48192 -Quahog Eggs- -.jpeg

Fig.1.--Mature egg ready for union with male cell . Fig.2.--Spermatozoa (male cells). Note length of tail and shape of head. No attempts were made to study the minute anatomy . Fig.3.--Egg, twenty-five minutes after fecundation, showing the two polar cells (pc) and the faintly developed yolk love . Fig.4.--Egg just previous to the first cleavage, showing large yolk lobe . Fig.5.--The two-celled stage at the completion of the first cleavage, fifty minutes after fecundation. The larger cell contains the yolk lobe . Figs. 6,7,8,9.--This series illustrates the process of cleavage in the egg during the change from the two-celled to the four-celled stage . Fig.10.--The four-celled stage, one hundred and ten munites after fecundation. Side view . Figs. 11,12.--The eight-celled stage, one hundred and forty-five minutes after fecundation . Fig.13.--The sixteen-celled stae, one hundred and eighty-five munites after fecundation. Side view . Fig.14.--The thirty-

• Subject: Northern quahog--Eggs, Norther quahog--Reproduction
• Tag: Shellfish