P. PEARSON 1949 78 Aetna Mines, 1100 ft., Napa Co, Calif. Boby 1577 ♀ Corynoichinus rafinesquei 54x19x9x13 forearm 15mm forgotten (lightest of those examined. Recorded as 2.2 g. when removed from its mother at noon May 29. Killed 10 a.m. May 30. Weight 2.2g. on top of beam balance. Skull 14mm long. Sand in follicles 1578 ♀ Corynoichinus rafinesquei Brought both from Aetna Springs April 28 and kept in cold room (bone room) + fed. Killed May 30. Mygale large. Fetuses in it. Born; swelling 17x10 [illegible] x x 9 [dors-vent]. Fetus 17mm. CR, & made spontaneous movements and heart was beating. Placenta 9x6mm. Male corpuscles under direct scope. Fetuses 2) ♂ 37x9x 7x9 forearm 9.5 skull 11mm. 1579 ♀ Corynoichinus rafinesquei 8.6 g. cought Aetna Mines May 29. Gave birth to young May 30 about 10 a.m. Killed May 31 5 p.m. = 30 hrs. post-partum. Mygale very large milk effesceable. Vaginal opening quite large, somewhat "raw" looking. Mammary tissues oval, about 8x1.5 x 1.5. Rt. horn of uterus still large and "collapsed," 6mm long and 5 mm. dorso-vent. when flattened. Only small follicles seen in both ovaries with dissecting scope. N.B. There is a slight possibility that this ♀ is only 6-24 hrs post-partum. In sections: much accumulated corpus luteum in left ovary. Intestinal tissues very taut - like, no large or med. follicles. 1580 ♂ Corynoichinus rafinesquei 52x18x9.5x13x½ forearm 16 2.2 g. Baby of above ♀. Mawes + chaps well, squishes loudly. Skull 13mm long, 1581 ♀ Corynoichinus rafinesquei cought Aetna Springs May 29. Baby born morning of May 31. Forearm 15mm. June 1, young looks screaming, weighs 2.0 g. June 3 baby died, killed mother. 7mm of child mutilated and still present on baby. Forearm still 15mm. Mygale very large milk effesceable. Vagina quite open but not torn at all. Stoutly. Rt. horn large + collapsed, 6 mm long and compressed ant.-post. so that it measures 5mm dorso-vent. Skull of baby 13½ mm. long a ♀