398 ECHINODERMATA. 
Thus the AnancuiTEs, Lam.—GaAt.e®, Kl.—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 Echinus 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*. 
The bands in some are quaternary f. 
We might form a seperate subgenus of certain species in which 
the four lateral bands are arranged by pairs, and do not meet at the 
same point t. 
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 
Ciypreaster, Lam.—Ecuinantuvs, £1., 
Where the anus is near the margin, and the body is depressed, with 
an oval base concave underneath. The contour is sometimes slightly 
angular §. 
Sometimes the middle of the back is elevated |}. 
There are some also in which the contour is not angular 4. 
And others in which it is almost orbicular—Lacanum, Kl. ** In 
FisuvarrA, Lam.—Ecuinocyamus, Leske, 
We observe the rosette of Clypeaster, an almost globular body, with 
the mouth and anus appropriated beneath. The Fibulariz are gene- 
rally very small t¢. In 
Spatancus, Lam., Al., 
On the contrary, we find the lateral mouth of the Ananchites, and 
incomplete bands of pores forming a rosette on the back. There are 
usually but four of them; the one that extends towards the mouth is 
obliterated. 
Some—Bnrissom£s, Kl.—have an oval shell without furrows ff. 
* Ech. scutatus, Walch., Mon. Dil., II, E., i, 3, 4;—Ech. pustulosus, Kl., XVI, 
A, B; Encye. 154, 16, 17;—Ech. papillosus, K1., XVI, C, D; Encyc., 155, 2,3. 
+ Ech. quadriradiatus, K)., LIV, 1; Encyce., 155, 1. 
+ Ech. bicordatus, K\.;—Ech. ovalis, K\., XLI, 5; Eneye., 159, 13, 14 ;—-Ech. 
carinatus, Kl., LI, 3, 4; Encye. 158, 1, 2. 
§ Ech. rosaceus, and its varieties, Encyc., 143, 1—6; 144, 7, 8; 147, 3, 4, taken 
from Klein, &c. - 
|| Ech. altus, Scill., Corp. Mar., IX, 1, 2. 
Ech. oviformis, Seb., III, x, 23; Encye. 144, 1, 2;—Ech. reticulatus, Seb., XV, 
23, 24, 35—38; Encyc., 141, 5, 6 ;—Ech. pyriformis, K1., LI, 56; Encye. 159, 11, 
12? 
** Echinus orbiculatus, Bourg., Petrif,, LIII, 352 ;—Ech. laganum, Seb., XV, 25, 
26;—Ech. subrotundus? Scill., Corp. Mar., VIII, 1, 3; Ech. orbicularis, Gualt., 
Test., CX, B;—Ech. corollatus, Walch., Mon. Diluv., If, E, ii, 8. 
+f Ech. nucleus, K1., XLVIII, 2, a, e; Encye., 153, 24—28 ;—Ech. lathyrus, 
Kl., XLVIII, 1,a,e; Encyc., 154, 6,10 3— Ech. craniolaris, Pall., Spicil. Zool., TX, 
, 24; Encyc., 154, 1—5, &c. 
tt Ech. teres, Seb., III, xiv, 3, 4, 5, 6, X, 22, ab. 19; Encyc., 158, 7—11, 159, 
1, 2, 3, &c.; Ech. brissoides, K)., XXVII, B; Encye., 259, 4 ;—Zch. amygdala, KI., 
XXIV, h, i; Eneyc., 159, 8, 10. 
