Mr. W. L. Distant on Malay Rhopalocera. 245 
Keramosphera Murray?, nov. gen. et sp. - 
Test free, porcellanous, spherical; formed of concentric 
layers, each consisting of a large number of chamberlets ar- 
ranged more or less regularly in single series. Chamberlets 
of the same.layer communicating with each other by short 
lateral stolons; those of the successive layers by the pores 
which formed the superficial apertures of the previous layer. 
Aperture consisting of numerous pores, one at the margin of 
each chamberlet. Colour white; surface areolated by the 
outlines of the somewhat convex chamberlets of the peripheral 
layer. Diameter about ~, inch (2°5 millim.). 
The specimens were found in material dredged during the 
‘Challenger’ expedition at “Station 157, March 3, 1874; 
lat. 53° 55’ S., long. 108° 35' E.; depth 1950 fathoms,”—a 
locality, roughly speaking, about five and twenty degrees south 
of the south-western corner of Australia. The material brought 
up was a nearly white, feathery-looking, diatom-ooze, com- 
posed chiefly of Diatomaceze, Radiolaria, sponge-spicula, and 
other siliceous organisms ; and the first point to be determined 
with reference to the specimens under consideration was that 
they were really calcareous. Foraminifera were not very 
numerous, about seventeen species in all; and the general 
aspect of the Rhizopod-fauna was distinctly arctic, except that 
the calcareous forms were, as a rule, somewhat thin-shelled. 
EXPLANATION OF PLATE XIII. 
Fig. 1. Keramosphera Murrayi, nov. a, natural size; 6, magnified 
25 diameters. 
Fig. 2, a,b. Another specimen laid open by fracture, showing the 
general internal structure. Magnified 20 diameters. 
Fg. 3. Portion of a nearly central section of the specimen shown in fig. 1. 
Magnified 50 diameters. 
Fig. 4. A smaller portion of the same, magnified 100 diameters, showing 
a, a,a,a, the orifices communicating between the chamberlets 
of the successive layers; 6, 6, 6, 6, lateral orifices communica- 
ting between the chamberlets of the same layer. 
XXIII.—Undescribed Rhopalocera from the Malay Peninsula. 
By W. L. Distant. 
Lycenide. 
Polyommatus (Cyaniris) Lambt, n. sp. 
Male. Wings above somewhat dark lavender-blue ; ante- 
rior wings with the costal area and outer margin somewhat 
