LOWER AND UPPER GREENSAND OF THE SOUTH OF ENGLAND. 
443 
3 late 10, fig. 71).—Four-rayed spicules; the rays straight, simple, sub-equal, tapering 
rom the central junction to an acute point, rarely rounded at the ends (fig. id). 
Very variable in size; the rays are from ’35 to '825 mm. in length, and from ’075 to 
125 mm. in width. 
With the above are sometimes associated smaller spicules (figs. 5, 5 a, b) with 
relatively shorter and plumper rays, which may probably belong to a distinct species. 
They are similar to those from the upper chalk which I have named P. Carteri (op. 
hft, i.,p. 46 ; Plate 3, figs. 29, 31), The rays are '225 to '35 mm. in length, by '08 mm. 
m width. 
These spicules are very generally distributed throughout the sponge-beds of the 
lower and upper greensand. Similar forms are present in the carboniferous (Hinde), 
lias (Dunikowski), chalk of England (Sollas, Hinde), Ireland (Wright), Westphalia 
(Zittel), and in the eocene of Brussels (Rutot). 
36. Pachastrella (Monilites) quadriradiata, Carter (Plate 43, figs. 6, 6a,; op. cit ., 
p. 132, Plate 9, figs. 44, 45). —Spicules of the same general form as the preceding, 
but, as a rule, much smaller, and the rays are throughout moniliform. Length of 
rays '25 mm., thickness '05 mm. 
L, G, S., Haslemere, U. G, S., Blackdown, Halclon, Warminster, 
Order: Lithistidce, 0. Schmidt. 
Family: Megamorina, Zittel. 
37. Doryderma, sp. (Plate 43, figs. 7-7z). —Detached spicules of sponges of the 
Megamorina family, of which the genus Doryderma may be taken as the type, are 
extremely abundant. They are of the most irregular and varied forms, generally 
elongate branching spicules with arms of unequal length, which terminate either in an 
obtuse point or in a slightly concave expansion. The branches in some of the larger 
spicules (figs. 7q, r, s, it) all terminate obtusely, and these appear to belong to the stem 
of the sponge, whilst the spicules wdiose rays terminate in an expansion belong to the 
body portion of the sponge. The larger spicules measure 2'5 mm. by T75 mm., whilst 
a small form is only '4 mm. by '062 mm. These spicules probably belong to several 
different species. 
L. G. S., Haslemere, Godalming, Tilburstow Hill, Sevenoaks. U. G. S., Blackdown, 
Haldon, Warminster, Penzlewood, Merstham, Ventnor. 
38. Carterella, sp. (Plate 45, figs, 1-lc).—Elongate, curved spicules with blunted 
extremities and irregularly notched surfaces. Length *95 to 1*4 mm., width 
0*75 mm. 
U. G. S., Warminster. 
