A.R. Boggs 1959 PERTHRODONYS PAUVERNSIS SAN PASCIO (salt marsh), Richmond, Contra Costa Co., Calif. MAR 15 6 σ + 2 ♀ FOR MUZ TAKEN IN SWAMPY AREAS IN SALT MARSH BY GEO. F. FISHER OF MUZ. O's SEEMED TO BE CLOSE TO SOME SORT OF BREASTING SINCE MOST SHOWED EVIDENT CLOD, TUBULES - NEEDLES WERE WHITISH + ABORT'S ABOUT 3 X 5 MM. ♀'s SEEMED TO HAVE CLOSED VAGINAS + UTERI WERE NOT ENLARGED - NO EMB's OR SCARS SEEN. THE HEAVIEST + BIGGEST MICE HAD A SLIGHT BID OF FAT - SHAWN OVER APARENTLY NONE. ALL EXCEPT 1 WERE QUITE REDDISH BELOW - THE EXCEPTION SHOWING A CERTAIN AMOUNT OF WHITE AT VENTRAL CROSSATION. APRIL 7 σ, ♀ + JUNIOR'S TAKEN BY FISHER. ONE WAS ONE OF HIS MARSH ANIMALS (TOECLIP) - (80-90000 - 133000) ALL MICE SEEMED QUITE REDDISH BELOW. 3 MICROTIUS + SOU + SAVANNAH SPREADS ALSO TAKEN IN 100 YEARS. THE 2 HEAVIEST OF RETHEM'S HAD TESTES 2 X 4 MM WITH CLOD, TUBULES NOT VISIBLE MACROSCOPICALLY BUT THE SMALLER ONES HAD TESTES 3 X 5 AND 3 X 6 MM WITH CLOD, TUBULES FAINTLY VISIBLE IN 2 OR 3 SPECIMENS. THIS SEEMS TO INDICATE SOME SORT OF A DIFF. IN BREASTING TIME BETWEEN LIGHTER (= YOUNGER?) AND HEAVIER (= OLDER?) MICE. THE 3 ♀'s HAD NO EMB's (1 SPA) OR OLD PLACE SCARS (2 SPA'S). NONE OF ANIMALS WAS OBSESSIVELY FAT. NONE SEEMED TO MUCH INFESTED WITH MITES.