Geological Soeitfi/. (J 01 



2055 b. Leucania phaoneura, sp. n. 



2. Head and thorax pale red-brown^ antennae brown, 

 the shaft -white towards base ; abdomen grey-brown, the 

 anal tuft and ventral surface pale red-brown. Fore wing 

 pale red-brown, the veins and basal half of submedian fold 

 with dark streaks; veins 6, 4, 3 defined by whitish streaks 

 to near termen ; an oblique postraedial series of dark points 

 from discal fold to above vein 1 ; a fine dark terminal line ; 

 cilia ochreous with three brown streaks through them. 

 Hind wing glossy red-brown; cilia ochreous with a brown 

 line near base; the underside whitish suffused with brown. 

 Had. Peku, Acopampa, 1 £ type. Exp. 34 mm. 



[To be continued.] 



PROCEEDINGS OF LEARNED SOCIETIES. 

 GEOLOGICAL SOCIETY. 



May 28th, 1913.— Dr. Aubrey Strahan, F.E.S., President, 

 in the Chair. 



The following communication was read: — 



' The Internal Structure of Upper Silurian Rugose Corals from 

 the Grindrod Collection, Oxford Museum.' By Donald Esrue limes, 

 B.A. 



In this paper the following genera and species are described : — 



Palceocyelv.s porpita, P. fletchert, P. rugosus. 

 Cystiphyllum $iluriensc, C. cylindricum. 

 Cyathophyllum (?) : a new species. 

 Cyatkophyllum articulatum, C. truncatum. 

 Strombodes murchisoni, Sir. typus, Sir. diffi 



The new species of Cyathophyllum (?) is of especial interest. It 

 was figured by Milne Edw ards & Haime as Cystiphyllum cylindricum 

 Lonsdale, with which it has no close affinities. It combines 

 characters of the Silurian Cyathophylla and Hallice with those of 

 the Lower Carboniferous Caninice. 



Particular attention is paid to the construction of a septum in 

 the various genera, the following types being all well repre- 

 sented : — 



(a) Radial spines on the vesicles, with their bases often connected by a 

 web. Example: Cystiphyllum. 



Ann. & Mag. A*. Hist. Ser. 8. Vol. xii. -12 



