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Show 1903.] IN FANCY MICE AND RATS. 83 W e may next consider the further evidence regarding mice. By the great kindness of Mr. F. G. Parsons, I a m permitted to include in this paper notes of 50 matings made by Mr. Parsons in conjunction with Dr. S. M . Copeman. These experiments were made with other objects in view and are still in progress, but as they stand they are a valuable contribution to the question of the inheritance of colour. The notes which Mr. Parsons has placed at m y disposal are here given exactly as they were received. I have merely inserted the letters D R and D D according as the results show that the individual in question was a heterozygote containing albino, or that it was free from the albino character. Those not thus distinguished cannot be discriminated by the existing evidence. The following abbreviations are used: bl., black ; br., brown = chocolate; blw., pied-black ; brw., pied-brown ; w., albino. Experiments made by Mr. F. G. Parsons. Mating. (1) w.?A X bhv.(?a(DR) (2) „ Xw.(?j3 (3) „ X brw. $ (Bxa)(DR) (4) w.$B Xblw.(?a (DR) (5) „ X w.<?/3 (6) „ Xbrw.<?y(Bxa)(DR) (7) „ X (8) blw. ? C (? DD) X blw. $ a (DR) (9) „ Xw.<?/3 (10) w.?D X blw.c?a(DR) (11) „ Xw.cJ/3 (12) „ Xbrw.(?7(BXa)(DR) (13) „ X (14) „ Xblw.<?a(DR) (15) w.?E Xblw.(?a(DR) (16) w.?F Xblw.<?a(DR) (17) „ Xw.J0 (18) w.?BMBXa) X blw.<?a(DR) (19) w.?B2(BXa) X (20) „ Xw.Je (21) w.?B3(BXa) Xblw.<?a(DR) (22) „ Xw.<Je..., (23) „ Xblw.C2-i(C2Xa)(DR) (24) blw. ? C1 (C X a) (? D D ) X blw. $ a (DR) (25) „ X w.<?e (26) brw.?C2(Cxa)(DR)X blw.,?a (DR) (27) „ X (28) „ Xw.<?e (29) „ Xbrw.«?C---(DD) (30) „ X (31) „ X (32) bl.?DHDXa)(DR) X blw.«?a(DR) (33) „ Xbhv.<?C--i(DR)(C-Xa) Offspring. 1 blw. 2 blw. 3 blw. 2 blw. 2bl. 2bl. 3bl. 2 blw. 1 blw. 2 blw. 2 blw. 4 blw. 5 blw. 7 blw. 2bl. 4 2 blw. 1 blw. 1 brw. 1 brw. 4 brw. 1 brw. 1 brw. lbr. 2br. 2br. lbr. 2 brw. 1 brw. blw. 1 brw. 2 brw. 4 brw. 7 brw. 6 brw. 7 brw. obi. 7 bl. 3w. 7w. 3w. 4w. 5 w. 5 w. 1 w. (1 eaten ?). . (1 eaten?). lw. 5 w. 6 w. 4w. 2w. 4w. 2w. (5 eaten?). 7 w. 3w. lw. 8w. 3 w. (1 eaten ?). 9w. 2w. . (2 eaten). .(3 eaten). 1 blw. lw. 2w. lw. 2w. 6* (1 eaten?). (3 eaten). |