The ornamental design for a model of lachrymalduct, as shown and described.
FIG. 1 is a top, right perspective view of a model of lachrymal duct showing the new design;
FIG. 2 is a front view thereof;
FIG. 3 is a back view thereof;
FIG. 4 is a right side view thereof;
FIG. 5 is a left side view thereof;
FIG. 6 is a top view thereof;
FIG. 7 is a bottom view thereof; and,
FIG. 8 is a cross sectional view of FIG. 5 taken along line 8-8.
The broken lines are for illustrative purposes only and form no part of the claimed design. Also, the alternate and short dash lines in FIGS. 1, 5, and 6 are boundary lines and form no part of the claimed design.