EXPLANATION OF THE PLATES AND WOOD-CUTS. 



Fig.ll, 17 a. FascioUtes (^axkia&ovL) elliptica. Elliptical with blunt extremities, bands 

 curved. Length 5^ lines, diameter 3 Hnes. Fig. 17 a. is magnified twice. 



Several species of this genus occur in the tertiary formations of Europe, but they 

 are longer in proportion to their thickness. 

 Loc Wage-ke-pudda and Baboa Hill. 

 The following species of Echinodermata are all reduced in the engraving to half their 

 dimensions. 



Fig. 18. Echinus dubius. Orbicular, depressed ; areae granulated, concave, and nearly 

 free from grains along the middle ; the larger furnished with two rows of tubercles 

 near each side ; the lesser with one row on each side ; pores of the ambulacra in 

 numerous, arched rows. Diameter about 3 inches, height about 1^ inch. 



This has apparently imperfect tubercles, and is much longer than Cidarites 

 variolaris, Brongn., which however it much resembles. 

 Loc. Baboa Hill and Wage-ke-pudda. 

 Fig. 19. Galerites pulvinatus. - Orbicular, depressed, spheroidal, covered with minute 

 tubercles. Ambulacra obscure beneath, crossed by grooves above. Diameter o\ 

 inches, height 1 inch 10 lines. 



A species much like G. depressiis, Lam., but more convex and ten times the size of it. 

 Loc. Baboa Hill. 

 Fig. 20, 20 a. Clypeaster affinis. (Goldfuss, p. 134, t. 43. f. 6.) 'I Our specimen ap- 

 pears to be more orbicular than the C. affinis of Goldfuss, but it is too imperfect 

 to be determined, — the posterior half being nearly all broken away. Length 

 about 2\ inches, width 2 inches, height 1 inch. 



Fig. 20 a. is a magnified view of part of the surface. 

 Loc. Baboa Hill. 

 Fig. 21, 2\ a. Clypeaster varians. More or less obovate, hemispherical ; base slightly 

 concave in the middle ; ambulacra elongated ; anus transverse. Length 2i to 3 

 inches, breadth 2 to 2^ inches, height 1| to 2 inches. 

 Fig. 21 a. Portion of the surface magnified. 



C. Bonei of Munster, (Goldfuss, 131. t. 41. f. 7.) resembles this, but is more de- 

 pressed, and has a circular anus. 



Loc. Baboa Hill and Wage-ke-pudda. 

 Fig. 22, 22 a. & b. Spatangus obliquatus. Gibbose ; emarginate at the front ; behind 

 obovate, rather acuminated, and truncated obliquely upwards. Ambulacra deeply 

 sunk in 3 large and 2 smaller ovate pits ; base slightly convex. Length 2^ inches, 

 width 2 inches, height li inch. 

 Fig. 22 b. is a magnified tubercle. 



Strongly resembling S. Bucklandii, (Goldfuss, 1.54, t. 47. f. 6.) it is however 

 much larger, and has unequal ambulacra. In this and the allied species with con- 

 cave ambulacra there is a reticulated band surrounding the ambulacra, which de- 

 serves attention. (See fig. 22 a.). 

 Loc. Baboa Hill. 

 Fig. 23, 23 a. Spatangus acuminatus. (Goldfuss, 158. t. 49. f. 2.)? Our specimen is 

 not quite so much elevated posteriorly as the figure given by Goldfuss, neither is 



