Text-book of comparative anatomy . e antennal and shell glands correspond with theAnnulatan nephridia, then, considering the different position of the maleand female genital apertures, several pairs (4 at the least) of thesegmental nephridia of the Auniildn have been retained in theCrustacea. 372 COMPAEA TIVE ANA TOMY CHAP. Entomostraca.—In the Brancliiopoda, the germ glands are paired ; in Brancliipus(Fig. 191, p. 288) they are tubular and lie in the abdomen ; in Apus they are richlybranched and lie in the limb-bearing division of the trunk. In Branchipus the ovi-ducts are widened out at thei
Text-book of comparative anatomy . e antennal and shell glands correspond with theAnnulatan nephridia, then, considering the different position of the maleand female genital apertures, several pairs (4 at the least) of thesegmental nephridia of the Auniildn have been retained in theCrustacea. 372 COMPAEA TIVE ANA TOMY CHAP. Entomostraca.—In the Brancliiopoda, the germ glands are paired ; in Brancliipus(Fig. 191, p. 288) they are tubular and lie in the abdomen ; in Apus they are richlybranched and lie in the limb-bearing division of the trunk. In Branchipus the ovi-ducts are widened out at their ends and enter a uterus in which the eggs remain for atime receiving a shell yielded by special uterine glands. The uterus lies in a pouchformed by a concrescence of genital prominences, the modified limbs of the two genitalsegments (12th and 13th trunk segments). The vasa deferentia are also widened out at their ends (sperm vesicles) and entera muscular ductus ejaculatorius, which, when the penis is evaginated, is drawn out R.
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectanatomycomparative
