FROM THE UPPER AND LOWER WHITE CHALK. 9 
The calice is elliptical, and the fossa very deep, the larger septa joining those opposite 
at its bottom. 
There are traces of epitheca. 
Height, 1 inch. 
Breadth of calice 3ths inch; length of calice, 1 inch. Depth of 
fossa gths inch. 
Locality. Trimmingham; Upper Chalk. In the Collection of the Rev. T. Wilt- 
shire, F.G.S. 
3. TRocHosMILIA (Ca@Losmitia) WittsHiri, Duncan. PI. III, figs. 1—5. 
The corallum is tall, curved, finely pedicillate, and is not compressed. 
The growth-rings are distinct. 
The cost are very distinct and unequal, and they reach from base to calice 
smaller intermediate coste are ornamented with chevrons and horizontal lines 
larger coste have a secondary crest upon their free surface. 
The septa are unequal, slender, and not crowded. 
The calice is circular. 
There are five cycles of septa, but the fifth is incomplete in some systems 
primary septa are large, slightly exsert, and extend far inwards. 
The calicular margin is very thin, and the fossa is deep. 
Height, lirdsinch. Diameter of the calice, rds inch. 
Locality. Norwich; Upper Chalk. In the Collection of the Rev. IT. Wiltshire, 
F.G.S. 
The 
The 
The 
. Trocnosmitia (CaLosmin1a) Woopwarpt, Duncan. PI. IV, figs. 5—8. 
The corallum is tall, cornute, slightly pedicillate, and narrow. 
The growth-markings are distinct. 
The coste are distinct from base to calice. Two large subcristiform and very 
distinct costae bound three intermediate small and more or less moniliform coste. Sets 
of these coste occur around the corallum. 
The septa are crowded, wavy, and unequal. Many unite laterally, and the largest 
reach far into the axial space. 
The calice is circular, and the wall is very thin. 
Height, 2 inches. Breadth of the calice, ths inch. 
Locality. Chalk of South of England. In the British Museum (Dixon Collection). 
2 
