346 Microscopical Society. 
22. Guanpina moniuireRA, Pfr. Glan. testa fusiformi-ovatd, tenui, 
pellucida, regulariter costulato-striatd, costulis in medio anfractis 
ultimi evanescentibus, fulvo-rosed, lineis remotis rufis pallide mar- 
ginatis ornatd ; spird brevi, conicd; suturd eleganter et confer- 
tim granulosd ; anfractibus 7 planiusculis, ultimo * longitudinis 
subequante, ventroso ; columelld vix arcuatd, basi abrupte trun- 
catd; apertura angustd, semiovali. 
Long. 29, diam. 144 mill, 
Locality, mountains of Coban, Vera Cruz, Central America, (Coll. 
Cuming.) 
A number of Birds’-skins from Australia were presented to the 
Society by Jeremiah Olive, Esq. 
The Secretary exhibited to the Meeting a specimen of Sand Grouse, 
Tyrrhaptes paradozus, and five specimens of Mammals (all of which 
were new to the Society’s collection), from the Altai Mountains of 
Siberia, viz. :— 
Meriones opimus, 
Aspalax Zokar, 
Mustela Altaica, 
Dipus Jaculus, 
Mygale moschata. 
Mr. Gould laid upon the table a series of ‘Terns, and characterized 
a new species :— 
STERNA GRAcILIS. St. summo capite et nuchd posteriore saturate 
nigris ; lateribus nuche et parte inferiore seriaceo-albis ; pectore 
et abdomine leviter rosaceis ; rostro carnicolore, apice brunneo- 
nigro ; pedibus aureo-fuscis. 
Crown of the head, nape and back of the neck deep black; sides 
of the neck and all the under surface silky white, with a blush of rosy 
red on the breast and abdomen; back, wings and tail light grey, 
becoming darker on the primaries; irides brownish red; bill flesh- 
colour, except at the tip, where it is washed with blackish brown ; 
feet orange-red. 
Total length, 13 inches; bill, 21; wing, 83; tail, 64; tarsi, 3. 
Hab. The Houtmann’s Abrolhos, off the western coast of Australia. 
MICROSCOPICAL SOCIETY. 
Oct. 15, 1845.—J. 8. Bowerbank, Esq., F.R.S. &c., in the Chair. 
A paper by H. Deane, Esq., being a continuation of a former com- 
munication, read at the last meeting of the Society, ‘‘ On Fossil 
Xanthidia found in Chalk,” was read. 
After a brief summary of the former paper, in which he stated that 
various species of the genus Xanthidium had been found by him in 
the Folkstone chalk, Mr. Deane went on to state that this discovery, 
by affording the means of isolating and mounting these bodies in 
various ways for examination, suggested to him the possibility of 
ascertaining their true nature. Their minuteness and other obvious 
