119. The outer division of the superior cava crosses
over the armpit, receiving some branches in that region,
and then runs, as the internal mammary, along the mar-
gin of the carapace with the artery of that name (96, g).
120. Before proceeding to study the inferior vena
cava, it will be necessary to dissect the Genito-urinary
Apparatus, Endeavor to get your next specimen (193)
of the other sex,* and on it complete the examination
of the reproductive organs.
121. If your present specimen be a female, proceed
next to section 138; if it be a male,-examine the
Male Reproductive Organs; for this purpose divide the
pelvic bones along the median ventral line and push
the halves apart; then divide. the muscles beneath.
