180 Mr. H. Seeley on new and little-known Fossils 
longitudinal section an angle of 130°. It is as wide as long, 
widest at the anterior third, Posterior side short. Height 1-5, 
inch ; length 143 inch, and as wide. Another example gives 
1/4 long, and as wide ; height 1;inch. In this latter the apex is 
more anterior. Having examined about sixty specimens, I believe 
these three varieties may be traced into each other; but it is ne- 
cessary to have the means of distinguishing any part of the 
series. 
Salenia (Hyposalenia) Wiltshirti (Seeley). 
Round, moderately depressed ; disk small and convex; anus 
protuberant, oval; mouth deeply sunk. 
The disk is smooth, punctate, graven with short lines, and 
notched round the circumference. 
An ocular plate is nearly semicircular, marked on its outer 
margin by two small notches (one on each side of the ambulacral 
granules), and separated from the genital plates by deep narrow 
notches, which are in a line with the interambulacral tubercles 
and terminate in a large puncture. At the inner apex of the 
plate, in a line with the ambulacra, is a large puncture, which di- 
vides the semicircular margin of the plate into quadrants, each of 
which is crossed in the middle at right-angles by a short narrow 
slit. The inner halves of these quadrants 3 are again divided by a 
mesial puncture, which is just as distant from ne shit as the punc- 
ture on its other side terminating the sutural notch. The trans- 
verse slits mentioned are so arranged that they radiate opposite 
to each other in fives round the genital openings, which are in 
the centre of the genital plates. 
There are six tubercles in each of the two interambulacral rows, 
of which three large ones are on the side and three small ones on 
the base. The plates of each row are confluent, not being sepa- 
rated by granules; but the rows are separated from each other 
by a sinuous double row of very large granules, between which ap- 
pears to be another double row much more minute. There are 
also a few large granules on the ambulacral border of the plates. 
The bosses of the tubercles are not greatly larger than 
these large granules; they are placed on elevated conical bases, 
the tops of which are crenulate. Ambulacra very narrow and 
straight, consisting of two rows of twenty dense granules, rather 
smaller than those between the ambulacra. 
Width 1 inch; height 3 inch, height to the margin of disk 
44 inch ; width of disk nearly ? inch. 
I have named this beautiful species in honour of the excellent 
Secretary of the Paleeontographical Society, who, in 1859, was 
the first to make known the fossil wealth of the Red Rock. 
