Memorial Church service, 11 a.m. The preacher will be the Reverend Larry Hill.

Holiday--no classes.

Film: Dance Center Film Series--Quarry. 7:30 p.m., Science Center D. Free.

Concert: Boston Pops, conducted by Arthur Fiedler. Boston Esplanade on the Charles River. Free.

July 5--Wednesday

Auditions: Summer School Chorus. See listing above. 3-5 p.m., Sever 11.

July 6--Thursday

Plays: Loeb Experimental Theater--"The Happy Journey," by Thornton Wilder, and "Where the Cross is Made," by Eugene O'Neill. One act each, with some improvisation. 2 p.m. and 7:30 p.m. today and tomorrow, 7:30 p.m. Saturday, Loeb Drama Center. Free; pick up tickets at Loeb box office between noon and 6 p.m. the day of the show.

Lecture: Dance Center Lecture Series--Marcia Siegel, dance critic for New York magazine, on current trends in dance. 2 p.m. Agassiz Living Room. Free.

Lecture: Thursday Speaker Series--"What is Body Language?" Lawrence Wylie, C. Douglas Dillon Professor of the Civilization of France. 4 p.m., Science Center C. Free.

Film: Center for Middle Eastern Studies--Children of Rage. 7:30 and 9:30 p.m., Science Center D.$1.00

July 7--Friday

8D--Last day to drop a course, or to change from credit to non-credit or audit within the same course (with 50 per cent adjustment of tuition). 20 Garden St.

Film: Ukranian Institute--"Taras Shevchenko." 7:30 p.m., Science Center D. Free.

July 9--Sunday