26 ART. 2. — H. YABE I CRETACEOUS 



of the suture line, while Grossouvre^^ considered it to be a 

 species rather referable to the genus Acanthoceras. Tlius, the 

 question in regard to the particular generic name that should 

 l)e retained for the group under consideration seems at present 

 an open one. 



Ammonites rudra occurs in the middle, and Amm. superstes 

 in the upper division of the Utatur group of South India. 

 According to Peron'-^ and Choffat, Ammonites closely resem- 

 bling the latter occur also in the deposits of the Turonian age 

 of Algeria and Portugal. Ammonites [Buchiceras) Hartii Hyatt 

 from the upper Cretaceous of Sergipe in Brazil which has been 

 referred by Kossmat to the same group, together with the above 

 two species, shows also a, close relation to Vascoceras, but the 

 specimen in this case seems too imperfect for the decision of its 

 proper generic position. 



AMMONITES KOTOI m. 



PI. VI., %s. 3 and 4. 



The only specimen here figured is an imperfect cast of the 

 interior in which only a portion of the outer volution is well 

 preserved. The suture line, however, is tolerably well preserved. 



Shell globose, inflated, consisting of many volutions. Umbi- 

 licus deep, moderate in breadth. Whorls lunular in cross- 

 section, l)roader than high ; uniformly rounded on the ventral 

 and lateral sides. Surface Avith numerous transverse ribs, and a 



1) Grossouvrk: Sur I' Animonitoi peramplm, p. 334. 



2) Peron: Les Ammonites da Crétacé supérieur de l'Algérie, p. 14.— Kossmat : I.e. 

 p. ]:;5. 



