362 



On iJie Geology of Cutch 



[Oct. 



imperfect to be determined,— the posterior half being nearly all broken 

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

 Loc. Baboa Hill. 



Clypeaster varians. More or less oboA^ite, hemispherical ; base slight- 

 ly concave in the middle ; ambulacra elongated ; nnns transverse. Length 

 2| to 3 inches, breadth 2 to 2h inches, height If to 2 inches. 



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

 is more depressed, and has a circular anus. 



Loc. Baboa Hill and \Yage-ke-pudda. 



Spatangns oblignaius. Gibbose ; emarginate at the front ; behind obo- 

 vate, rather acuminated, and truncated obliquely upwards. Ambulacra 

 deeply sunk in 3 large and 2 smaller ovate pits; base slightly convex. 

 Length 2|- inche=;, width 2 inches, height 1 ^ inch. 



Strongly resembling S, BucUandii, (Goldfuss, 154, t. 47. f. 6.) it is 

 however much larger, and has unequal ambulacra. In this and the allied 

 species with concave ambulacra there is a reticulated band surrounding 

 the ambulacra, which deserves attention. 



Loc. Baboa Hill. 



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 it cjuite so wide ; in both these circumstances it approaches 

 to S. lacunosus ; but it is laterally crushed, which may account for the 

 difference. Length 1^ inch, width nearly the same, height 10 lines. 



Loc. Baboa HilL 



Spatangus elongatus. Elongated, ovate, depressed ; front emarginate ; 

 base convex ; ambulacra concave, with two of the rows of pores nearly 

 central ; apex excentric ; mouth remote from the margin. Length near- 

 ly 2| inches, width If inch, height 1 inch. 



The tv/o posterior ambulacra and the posterior portion of the shell 

 are broken ; the description is therefore incomplete. 



Loc. Baboa Hill. 



Clypeaster ohlongus. (C. scutiformis ? Lam.) Oblong, subpentagonal, 

 convex above, concave beneath ; ambulacra very broad, obtuse. Length 

 2| inches, breadth above 2 inches, height 7 lines. 



The specimen is too much mutilated to show the anus. It is more 

 pentagonal than C scutiformis, to which we have before referred it. 



Tertiary Formation. Loc. Between Joongrea and Kotra. 



Clypeaster depressus. Pentagonal, much depressed ; ambulacra oval : 

 anus very near the margin. Length in the oldest individual about 2 

 inches, breadth rather less, height about h inch. 



This differs from C, Laganwn in the position of the anus, which in that 



