G ART. -2. — II. YABE : CRETACEOUS 



Only a single fragment of this shell having been found, it 

 is hardly possible to get a general idea of its shape and sculpture. 

 The writer has long been under the impression that it resembles 

 more or less clearly 7\ 3IanlclU Shaupe, but the slender, elongate 

 outline of the shell and the four rows of spines on the whorls 

 being not nuich différent in size and number, seem to show that 

 it is more closely related to T. Berger I Bron(;niart. Among 

 the figures of the said species from foreign Cretaceous deposits, 

 which are accessible to the writer, that of a fragment with tW'O 

 contiguous whorls from the Chloritic JMarl of Jîonchurch, Jsle of 

 Wight (shown by Sharpe in his PL XXVII. , iig. 10) exhibits 

 the closest resemblances. 



Stoliczk.v descril)es the tubercles of T. Berger I as often 

 s})inose and sharp, but none of his figures shows tubercles so sharp, 

 and laterally so compiessed as in our specimen which in this 

 respect comes closer to an immature one figured by Sharfe in 

 his monograph (PI. XXVI., fig. 11). 



In point of the existence of only a slight ditlerence in the 

 size and number of spines in the upper and the lower rows, 

 this species resembles 2\ BlanicMl more than T. Bcrgerl, while 

 the close arrangement of the spines in each row makes it re- 

 semble T. Bergerl var. 'miliaris (Pictet et Campiche : 1. c. 



fig. .-,). 



Taking these several points into consideration, it appears to 

 be quite evident that this form is specifically distinct, not only 

 from T. Bergerl and T. Mantelli, but also from all others hither- 

 to described, the nearest ally however being T. Bergerl. 



Jjucality — The Popet, near the mouth of the ^Sanushilje. 



Horizon : — Lower Ammonite-beds. 



X^orcign localities and horizons of T. Berger} and 1\ Matltelll : 



