Geological Society. 179 
field darker, lines indistinct, indicated by difference of tint on 
either side ; first line curved; basal space paler, with a darker 
patch on the inner margin near the base; second line running 
at first slightly outward, then parallel to the hind margin, 
then inwards to beneath the reniform stigma, and lastly 
vertical to the inner margin; the two stigmata dark, with the 
space between them paler; the second line is followed by a 
pale space on costa and sometimes also on the inner margin ; 
a line of black dashes before the fringes, which are silky 
ochreous. Hind wing greyish fuscous, with faint indications 
of a paler submarginal band. 
In the single female the darker tints throughout are almost 
black, the paler spaces being by contrast whiter; but this 
may not be a sexual peculiarity. 
Expanse of wings 16 millim. 
One female, two males, from 8. Lorenzo Island, Callao. 
Tritea ferruginea, sp. n. 
Fore wings reddish ochreous, somewhat iridescent, with 
faint indications of two stigmata and an outer line, which 
are darker; a row of dark spots along the hind margin. 
Hind wings glossy, pale ochreous, darker towards the hind 
margin, showing a faintly darker submarginal band, which 
forms a darker spot towards the anal angle. 
Expanse of wings 16 millim. 
One male from Coquimbo. 
[To be continued. } 
PROCEEDINGS OF LEARNED SOCIETIES. 
GEOLOGICAL SOCIETY. 
November 11, 1891.—Sir Archibald Geikie, D.Se., LL.D., F.R.S., 
President, in the Chair. 
The following communication was read :— 
“On Dacrytherium ovinum from the Isle of Wight and Quercy.” 
By R. Lydekker, Esq., B.A., F.G.S. 
The Author described a cranium and mandible of Dacrytherium 
Cayluai from the Quercy Phosphorites, which proved the identity 
of this form with the Dichobune ovina of Owen from the Oligocene 
of the Isle of Wight. The species should thus be known as 
Dacrytherium ovinum. It was shown that the mandible referred 
by Filhol to D. Cayluxi belongs to another animal. 
