A Monograph on the Sub-class Cirripedia · Charles Darwin
ALCIPPE LAMPAS.
Fig. 16, Pupa of male Alcippe lampas, viewed laterally; _a_, antennæ, _c′_, eyes attached to the apodemes; above these the single eye of the mature male may be distinguished. 17, Abdomen of the same; _p_, posterior end of thorax; _q_, abdomen; _r_, caudal appendages. 18, Male of Alcippe lampas immediately after the metamorphosis, the ventral surface being uppermost, but the specimen has been in some way distorted, as the lobe (_i_) ought to project on the opposite side; _a_, antennæ of the pupa; _g_, _h_, lateral lobes; internal organs not yet formed; orifice at upper end (_i_) not visible; scale same as for the pupa, fig. 16. 19, Male of Alcippe lampas, when fully mature; scale same as in last figure (18) and as in fig. 16. _a_, antennæ of pupa. _b_, vesicula seminalis. _c_, _eye_, (seen in fig. 16 above the eyes of the pupa, _c′_.) _d_, testis. _e_, lower transverse muscle. _f_, upper transverse muscle. _g_, _h_, lateral lobes of the external covering, answering to the sides of the peduncle of the female. _i_, terminal lobe on the ventral side of the orifice, probably corresponding with _a_ in fig. 1, Pl. 22. _k_, orifice of the tubular sack. _l_, oblique muscles on the ventral side of the sack. _m_, probosciformed penis, shown exserted; _m′_ portion within the tubular sack.
Text from Project Gutenberg, public domain in the United States.