CEUSTACEA. 79 



narrower than the inner one. Between these two incisions the orbital margin forms 

 a broad rounded lobe, provided with a short spine ; a similar spine appears at either 

 side of the two incisions. There are three lateral spines, of which the first is broad 

 and long, projecting straight in front ; this is separated by a deep and broad in- 

 cision from the second one, which is narrower and obliquely directed ; the latter 

 is separated from the short third antero-lateral spine by a very short incision. 



The whole surface of the anterior part of the carapace is covered with numerous 

 fine tubercles, which become somewhat coarser in the middle than at the margins. 

 The specimen just shows the first of the fine transverse ridges which cover the pos- 

 terior part of the carapace, which seems to have been covered also with extremely 

 fine closely set punctures. 



Locality and stratigraphical position, — Neighbourhood of Khattan. 



Remarks. — IRanina griesbachi represents one of the largest species of this 

 genus ; it is easily distinguished from all the other species by the formation of its 

 front margin. The deep orbital and lateral incisions divide it into bold lobes, the 

 antero-lateral one of which is provided with two strong spines. In this peculiar 

 feature Banina griesbachi differs from all the other known species, while in the 

 general shape of its front margin it greatly resembles the eocene Banina 

 marestiana, Konig. 



It is possible that the species here described belongs to the genus jRaninella, 

 Milne-Edwards, but as the chief distinction of this genus from Banina consists in the 

 shape of the plastron, which is not visible in the specimen under examination, I 

 refrain from expressing an opinion and take it as belonging to the genus Banina^ 

 to which all the characters of the carapace point. 



GoTsrnment of India Central Printing Office.— No.60 D. G. Suryey.— 11-8.97.— 125, 



