398 ECHINODERMATA. 



Thus the Ananchites, Lam. — Galle^e, K1. — 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 ovafus, 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 J . 



Sometimes these irregular Echini with a central mouth have 

 bands of pores vt^hich do not extend as far as the mouth, but form a 

 sort of rosette on their back, as in 



Clypeaster, La77i. — Echinanthus, KL, 

 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^. 

 And others in which it is almost orbicular — Laganum, Kl. ** In 

 Fibularia, Lam. — Echinocyamus, Leske, 

 We observe the rosette of Clypeaster, an almost globular body, with 

 the mouth and aims appropriated beneath. The Fibularise are gene- 

 rally very small f f . In 



Spatangus, Lam., KL, 



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 — Brissoides, Kl. — have an oval shell without furrows J|. 



* Ech. scutatus, Walch., Mon. Dil., II, E., i, 3, 4;— ^c^i. pustulosus, KL, XVI, 

 A, B; Encyc. 154, 16, 17; — Ech. papillosus, Kl., XVI, C, D; Encyc, 155, 2,3. 



f Ech. qvadriradiutHS, KL, LIV, 1; Encyfc., 155, 1. 



+ Ech. bicordatus, KL; — Ech. oralis, KL, XLI, 5; Encyc, 159, 13, 14; — Ech. 

 cari/iatus, KL, LI, 3, 4 ; Encyc. 158, 1, 2. 



§ Ech. rosaceus, and its varieties, Encyc, 143, 1 — 6 ; 144, 7, 8 ; 147, 3, 4, taken 

 from Klein, &c. 



II Ech. alius, ScilL, Corp. Mar., IX, 1, 2. 



*i Ech. oviformis, Seb., III.x, 23 ; Encyc 144, 1, 2 ; — Ech. reticulutus, Seb., XV, 

 23, 24, 35 — 38 ; Encyc, 141, 5, 6 ; — Ech. pyriformis, KL, LI, 56 ; Encyc. 159, 11, 

 12? 



** Echinus orUculalus, Bourg., Petrif., LIII, 352; — Ech. lagamim, Seb., XV, 25, 

 26; — Ech. siibrotundus ? ScilL, Corp. Mar., VIII, l, 3; Ech. orbicularis, Gualt., 

 Test., CX, B •,—Ech. corollatus, Walch., Mon. Diluv., II, E, ii, 8. 



ft Ech. nucleus, KL, XLVIII, 2, a, e ; Encyc, 153, 24 — 28;— Ech. lathyrus, 

 KL, XLVIII, 1, a, e ; Encyc, 154, 6, 10 \—Ech. craniolaris, Pall., Spicil. ZooL, IX, 

 1, 24; Encyc, 154, 1— 5,'&c. 



+ + Ech. teres, Seb., Ill, xiv, 3, 4, 5, 6, X, 22, ab. 19; Encyc, 158, 7—11, 159, 

 1, 2, 3, &c ; Ech. brissokhs, KL, XXVII, B ; Encyc, 259, 4 •,—Ech. amygdala, KL, 

 XXIV, h, i; Eneyc, 159, 8, 10. 



