26 
parison with Klein’s figure of the recent shell, Tab. xxi. a. b. 
and with Leske’s description of that part, which is here in best 
preservation. “ Ambulacra petalorum ovatorum figuram sistunt, 
atque singula ex serie simplici punctorum interiore, et striarum 
obliquarum, testam penetrantium, non tamen puncta interiora 
prorsus attingentiam, componuntur : in apice ambulacrorum puncta 
non conjunguntur, sed spatium intermedium relinquunt. Addita- 
menta ad Kleinii dispositionem Echinodermatum.” P. 196. This 
fossil, which was in the collection of Lord Bute, is, I suspect, from 
Verona. 
The second family of this section is the Lag ana of Klein. The 
species Echinodiscus Laganum , or pancake of Leske, includes, on 
account of their similarity, the first and third species of Klein, and 
are exemplified in Klein’s Plate xxn. a. b. c. The specimen which 
is here figured, Plate III. Fig. 10, may be considered perhaps as 
only a variety of this species. The shell is white, and of a form 
between the oval and pentagonal. The mouth is central, and an 
obtuse pentagon ; the anus is small and round, and nearly midway 
between the mouth and the margin. Five slightly hollowed lines, 
proceeding from the mouth, divide the under part of the shell into five 
nearly equal areas, by coinciding with the centre of the terminations 
of the ambulacra. These are ten, biporous and undulating; and 
form, on the upper surface, five pentaphylloidal figures, expanding at 
their extremities. This species is not noticed by Linnaeus. 
Echinodiscus suhrotundus, Tab. xlvii. Fig. 7? Lesk. ; Scilla, Tab. 
vm. Fig. 1 — 3. Leske, who had never seen this fossil, has copied 
his figure from that of Andraea, in Litt. Helvet. Tab. v. Fig. g. But 
the figures of Scilla and of Andraea do not, as Leske supposes, agree. 
In that of Andraea the edge is acute, and somewhat undulating ; 
whereas, in that of Scilla, the margin is obtuse, and nearly circular. 
The fossil figured Plate III. Fig. 2, from Italy, agrees with the former 
in its edge being undulating. 
