1888 - 89 .] Mr John Rattray on the Genus Coscinocliscus. 637 
towards the centre opposite the rays ; the puncta obscure, isolated 
towards their inner, more crowded around their outer extremities, 
10 to 12 in *01 mm.; the intervals narrow, of uniform width, their 
outer ends convex outwards not reaching the border, a small round 
clear granule intervening between them and the border. Border 
narrow, indistinct. 
Habitat. — Barbados deposit (Greville !). 
A. hittoniana. Grey., Trans. Micr. Soc. Lond ., 1862, p. 53, 
pi. viii. fig. 39. — Diam. '04 to *05 mm. Central space heptangular, 
about i of diam. broad, its sides deeply concave outwards. Mark- 
ings : central space punctato-areolate ; rays 7, straight ; the com- 
partments reaching from to J of radius inwards, their inner ends 
concave inwards on each side of, hut protuberant opposite, the 
rays, sometimes bluntly conical, their centro -lateral angles rounded, 
the markings obscure ; the intervals alternating rapidly outwards, 
not reaching the border, their outer ends acute, with a minute 
rounded granule at each side sometimes visible. 
Habitat. — Barbados deposit (Kitton, Dehy !). 
A. traducens , sp. n. — Diam. *0875 mm. Central area circular, 
'025 mm. broad. Markings on central area isolated, rounded or 
irregular and minute granules; rays 16, narrow; at middle of 
interradial spaces a narrow, sharply defined, suhlinear area ex- 
tending from their inner ends to the intervals; the compartments 
with inner ends faintly defined, an outwardly concave row of 
minute puncta stretching between the extremities of the adjacent 
intervals, those contiguous to the intervals somewhat more promi- 
nent, elsewhere the puncta more minute and obscure; intervals 
tapering rapidly outwards, their outer ends acute, not reaching the 
border. Border obtusely and subregularly polygonal. — (PI. III. 
fig. 22.) 
Habitat. — Barbados deposit (Deby !). 
A. pulclira. Grev., Trans. Micr. Soc. Lond., 1862, p. 53, 
pi. viii. figs. 37, 38. — Obtusely and regularly octagonal. Diam. 
'0625 mm. Central space distinct, ^ to J of diam. broad, its sides 
deeply concave outwards between the radii. Markings : on central 
space a few irregular, obtusely angular or subareolate granules ; 
