Prof. E. Forbes on Fossil Invertebrata from Southern India. 1 13 



A fragment of a very beautiful finely-polished Ammonite, the whorls of which 

 appear to have been ornamented with radiating, rather undulating sulcations, 

 separating broad, smooth, rounded ribs which run over the rounded back. The 

 surface is very smooth, but bears traces of minute striae. It is closely allied to the ) U 

 Columbian Ammonites Dumasianus, described and figured by M. D'Orbigny in his ( ^^^"^^ a ct, 

 ' Geology of South America.' v_ Y^4icnf 



Locality, Verdachellum. 



25. Ammonites Sugata, sp. nov. PI. X. fig. 2. 



A. testa subcompressa, umbilicata, laevigata ; anfractibus amplexantibus ; dorso rotundato, 

 carinato, carina elevata obtus4 ; apertura compressQ-lunata. 



Diameter 1-2- inch. 



Thickness Oi inch, 



A Nautilus-like shell, compressed at the sides, rounded at the back, but bearing 

 an obtuse narrow siphoniferous keel. The surface is smooth ; the centre is umbi- 

 licated ; the mouth is oblong and lunate. 



Tt is allied to the Ammonites alpinus of the French gault. yu*^ J-o- 

 Locality, Verdachellum. ( ^''^ '~"'^' 



7 J- * Th^I}ociir<^^ 



26. Ammonites Sacya, sp. nov. PI. XIV. fig. 10. 



A. testa discoidea, concava, laevigata, anfractibus 5, rotundatis, minutissime transverse 

 striatis ; costis obscuris distantibus interruptis ; dorso rotundato (apertura rotundata). 



Diameter 1/2 inch. 



Diameter of last whorl 0y^2^ inch. 



Thickness 0j^2 inch. 



A Planorbis-like species, with thick round-backed whorls, so coiled as to exhibit 

 a broad and concave umbilicus. The surface of the shell is minutely striated 

 across. The last whorl is crossed at distant intervals by obscure ribs marking 

 periods of growth. The chambers are not visible. 



Locality, Verdachellum. 



27. Ammonites Gaudama, sp. nov. PI. X. fig. 3. 



A. testa compressa, anfractibus planatis ad suturam, abrupte rotundatis ; ad dorsum, flexuoso- 

 sulcatis; varicibus continuis, in ultimo anfractu distantibus ; dorso rotundato (apertura ). 



Semi-diameter l|i inch. 



Thickness 0|i inch. 



A fragment of a very distinct Ammonite, allied to A. Mayorianus of D'Orbigny, 

 having flat coiled whorls, which are semi-sulcated ; the furrows run across the 

 rounded back. Several varices of growth cross the outer whorl at irregular 

 distances. 



Locality, Verdachellum. 



