PEDICELLATA. 339 
In others it is both traversed by these large holes, and emargi- 
nated(1). 
Finally, in the Rorvza, KI., part of the posterior margin is fes- 
tooned like a dentated wheel; the Rotulz are also divided into those 
which are traversed by large holes(2), and those in which they are 
wanting(3). 
Cassipu.tvus, Lam. 
The Cassiduli are oval, with the anus situated above the margin 
as in the Nucleolites, but are distinguished by their incomplete 
bands of pores, that is they do not extend from one pole to the 
other in the figure of a star(4). 
In other irregular Echini the mouth is not in the centre of their 
base, but on one side, opening transversely and placed obliquely; 
the anus is on the opposite side. ‘They are also subdivided accord- 
ing to the extent of the ranges of holes. 
Thus the Anancurres, Lam.—Ga ea, KI.,—are nearly similar in 
form to the Galerites, and have their complete bands; they chiefly 
differ in the position of their mouth. They are all fossil. 
Such is the Lchinus ovatus, L.; Cuv., et Brongn., Envir. de 
Par., 2d edit., f. V, 7, A, B, C, D. Very abundant in the 
chalk in the environs of Paris(5). 
The bands in some are quaternary(6). 
We might form a separate subgenus of certain species in which 
the four lateral bands are arranged by pairs, and do not meet at the 
same point(7). 
Sometimes these irregular Echini with a central mouth have 
bands of pores which do not extend as far as the mouth, but form a 
sort of rosette on their back, as in 
CiypreasTerR, Lam.—Ecuinantruus, Kl. 
Where the anus is near the margin, and the body is depressed, 
(1) Ech. tetraporus, Seb., XV, 5, 6; Encyc. 148. 
(2) Ech. decadactylus, Encyc., 150, 5—6;—E£ch. octodactylus, Ib., 3, 4. 
(3) Ech. orbiculus, Encyc., 151, 1—4. 
(4) Cassidulus caribeorum, Lam., Encyc., 143, 8, 10;—Zch. lapis cancri, Kl., 
XLIX, 10,11; Encyc., 143, 6, 7;—Hch. patellaris, K\., LI, 5, 6, 7. 
(5) Ech. seutatus, Walch., Mon. Dil., Il, E.,i,3, 4;—Zch. pustulosus, Kl., XVI, 
A, B; Encyc. 154, 16, 17;—Ech. papillosus, Kl., XVI, C, D; Encyc., 155, 2, 3. 
(6) Ech. quadriradiatus, Kl., LIV, 1; Encyc., 155, 1. 
(7) Ech. bicordatus, Kl.;—Ech. ovalis, Kl., XLI, 5; Encyc., 159, 13, 14;-—Ech. 
carinatus, Kl., LI, 3, 4; Encyc. 158, 1, 2. 
