35S 



On the Geology of Cutch. 



[Oct. 



middle of the sides, bent forward as they pass over the margin. Diame- 

 ter 4 inches, thicknes 1| inch. 

 Loc. near Charee 



Ammonites 0/9Z5... Discoid, compressed, with an obtuse edge, radia- 

 ted ; inner whorls one-third exposed ; whorls slightly convex on their 

 sides, their inner edge rounded ; radii commencing with a curve at the 

 inner edge of the whorls, numerous, prominent, rounded, often forked 

 near the middle, slightly bent forward as they pass over the front ; 

 aperture elliptical. Diameter 4:| inches, thickness 1^ inch, length of 

 aperture 1:^ inch. 



Loc. near Charee. 



Ammonites arthriticus. Discoid, thick, with convex whorls and a 

 rounded margin, tuberculated and ribbed ; whorls half-exposed, about 4, 

 their inner margin smooth ; tubercles large, near the middle of the sides 

 of the whorls, about 12 in each whorl ; ribs prominent, rounded, 3 or 4 

 from each tubercle and sometimes an intermediate one ; aperture nearly 

 circular, completed 3 or 4 times in each whorl with a thickened edge. 

 Diameter 2| inches, thickness 1 inch. 



Loc. near Charee. 



Ammonites ignobilis. Discoid, depressed, umbllicated, keeled, radia- 

 ted ; front rounded with a slightly prominent entire keel ; umbilicus 

 small, with squarish edges, exposing a small portion of the inner whorls ; 

 radii covering half the whorl, in pairs or forked, commencing and termi- 

 nating with obscure tubercles, waved ; aperture sagittate, narrow\ Diame- 

 ter nearly 3 inches, thickness 10 lines. Length of the aperture 1^ inch. 



Loc. near Charee. 



Ammonites corrugatus (M. C. t. 451, f. 3.) ? An imperfect specimen^ 

 rather more strongly ribbed than the one figured in Mineral Conchology. 

 Loc. near Charee. 



Ammonites Armiger. Discoid, inner volutions exposed ; inner whorls 

 radiated and furnished with a row of tubercles on their sides; outer 

 whorl with a row of tubercles near the inner edge, and a row of spines 

 near the outer edge on each side, — the tubercles and spines connected by 

 thick ribs ; margin flat ; aperture oblong, squarish. Diameter 7 inches. 



Strongly resembling A. perarmatus (M. C. t. 352.), but the whorls in- 

 crease more rapidly in size, and the aperture is longer. Probably A, 

 Catena^ A. perarmatus^ and this are only varieties of one species. 



Loc. near Charee. 



Crinoidal stems, apparently of 3 species. 

 Loc. near Charee. 



