See. ee ee ee 
with a Synopsis of the Species included therein. 125 
tubercles, eight in a row; scrobicular circles neatly defined ; 
mouth-opening small; apical disc narrow and prominent, 
Locality.—Pea-grit, Inferior Oolite, Crickley Hill. 
Coll. Dr. Wright. 
Hemipedina Bonei, Wright, nov. sp. 
Test small, pentagonal, depressed ; ambulacral areas with two 
marginal rows of close-set tubercles ; interambulacral areas 
with one entire row and four short rows of tubercles, which 
extend only as far as the equator; tubercles of both areas 
about the same size; base flat; mouth moderate in dimen- 
sions ; peristome unequally decagonal ; apical disc absent. 
Locality.—Pea-grit, Crickley Hill. 
Coll. Dr. Wright. 
C. Species from the Great Oolite and Cornbrash. 
Hemipedina Davidsoni, nov. sp. 
Test much depressed, 1 inch in diameter ; ambulacral areas with 
two rows of marginal tubercles very regular in their arrange- 
ment throughout ; imterambulacral areas wide, with two rows 
of primary tubercles, fourteen in a row, and two rows of 
secondary tubercles which extend beyond the equator, between 
the former, and two rows of smaller tubercles between the 
main rows and the poriferous zones, so that at the equator 
there are six rows of tubercles abreast, whilst on the upper 
surface there are only two rows; mouth-opening small, in a 
concave depression ; peristome decagonal and nearly equally 
lobed ; apical disc absent. 
Locality.—The sandy beds of the Great Oolite, Minchin- 
hampton. 
Coll. Dr. Wright: only one specimen known. 
Hemipedina Woodwardii, Wright, nov. sp. 
Test circular, much depressed ; ambulacral areas narrow, with 
two rows of small tubercles below and extending as far as the 
equator, diminishing to granules on the upper part of the 
areas; interambulacral areas with two rows of rather large 
primary tubercles, eight in a row, and two rows of secondary 
tubercles, three to four in each row, which scarcely reach the 
equator, the upper part of the intertubercular space being 
filled with a small, abundant miliary granulation ; apical disc 
