absorbens: etc. cf.
Verg. A. 3.421
[Charybdis] imo barathri ter gurgite
vastos sorbet in abruptum fluctus
barathrum: this name
was sometimes applied by the Greeks to an artificial, in
many cases subterranean, channel for the draining of a lake
or overflowing river; cf. the emissarium of the Albam Lake.
Pheneum: Pheneus was a
city in northwestern Arcadia, near Mt. Cyllene. Pausanias
(Paus. 8.14) mentions the
ascription to Heracles of an existing outlet for the swollen
waters of the neighboring river Olbios.
montis medullis: cf.
the more common figure in
Verg. A. 3.575
audit = dicitur; perhaps only
here in this sense with an infinitive; but cf. Grk. a)kou/ein, and Latin cluere (e.g.