36 
Between each of the two prominent lips a double series of pores 
unite, forming a five-rayed star round the mouth. The anus is round, 
and placed in the upper part of the acute extremity of the shell. 
One of these fossils, from St. Peter’s mountain, is delineated Plate 
III. Fig. 6. 
JEchinites lapis caneri. Tab. xlix. Fig. 10, 11, LesJc. This name 
was given by Leske, from a supposed resemblance to the stones com- 
monly called crabs’-eyes. The shell is obtusely oval ; in the vertex, 
which is excentrical, are four pores ; and there meet five biporous, 
ovato-lanceolated, petaloidal ambulacra, divided at their points. The 
base is slightly excavated ; the mouth is in the centre, but nearer to 
the narrow end ; the anus is oval, and raised on the broader end, 
in the upper part of a rounded groove. Plate III. Fig. represents 
a specimen, which, I have reason to believe, is from Switzerland. 
Echinites pate/laris, Tab. liii. Fig. 5, 6, 7> Lesk. This species, 
which is smaller than the preceding, is described as differing from all 
others, except as to the mouth and anus, which agree in their situa- 
tion with those of the two last species. The difference appears chiefly 
to consist in the shell being considerably depressed, and the ambu- 
lacra being disposed in the form of a star. The shell is ovate in its 
periphery, the back is slightly convex, and the base gently hollowed. 
I do not know if the curious echinite, Plate IY. Fig. 10, from 
Verona, has been yet described. It is very flat, of a rude, sub-cordate 
form, and possesses a finely-granulated surface, which seems to be 
so formed by the points to which the minute spines have adhered. I 
must however acknowledge that I have only been able to discover 
one aperture in this fossil, which is in its margin. 
