42 
Several other rare mosses were noticed : the more un- 
common being Bartramia rigida, and Hednigidium imberbe. 
Specimens of these were likewise exhibited, with about 25 
specimens of Phanerogamic plants, e.g., Dianthus deltoides, 
Saponaria, Koniga, Veronica hybrida, Mentha 4 specimens, 
etc. 
Me. J. Cosmo Melvill exhibited the new shell of the 
Genus Rostellaria (R. Martinii, Marrat) from the coral reefs 
of Cebu, one of the Philippine Islands. 
He likewise gave a resume of the position and natural 
affinities of the Genus ; and produced examples of five other 
species of Rostellaria from his private collection for com- 
parison. The new species swells the number of known 
recent species up to nine, including two of the Subgenus 
Rimella, perhaps referable to Strombus. Its nearest ally is 
R. curvirostris, (Lum.) from which it differs by its greater 
size, its lightness, and above all by the channelled suture 
not being so well developed. It is very strange that so 
well worked a coast as that of Cebu should at so late an epoch 
have produced so imposing a novelty, as this is much the 
largest specimen of the Genus. But two specimens are 
known; the other having been presented by Mrs. Price 
Martin to the Liverpool Museum. No other species of 
Bostellaria proper is known to inhabit the Philippine Isles. 
Though both the species of the Subgenus Rimella are native 
there. R. curvirostris is from the Red Sea, the R. rectiros- 
tris (Sov.) = fusus (L.) being from Celebes. 
