IN THE MUD OF THE LEVANT. 57 



Rotalia Beccarii, two or three species of Poly- 

 stomella, Rosalina globularis, identical with those 

 from the Levant (Figs. 26 and 28), Textillaria 

 — several species, one of which is identical with 

 Fig. 33 ; another so closely resembling T. globu- 

 losa, (Ehr.) — the species so common in the Chalk 

 as not to be distinguishable from it. The most 

 interesting feature in this deposit is the com- 

 parative abundance of the genus Lagena of 

 Walker, and our older conchologists. I have 

 already detected L. striata, L. Isevis, L. globosa, 

 L. marginata, L. squamosa, and one or two 

 additional undescribed species,* The deposit 



* It appears that out of the genus Lagena, Ehrenberg has 

 constructed the two genera, — Miliola and Endosolenia. Dr. 

 Bailey has sent me Lagena striata, from the Miocene Tertiary- 

 strata of Petersburg, U.S., under the name of Miliola Ficus, 

 which name he received from Ehrenberg, and along with it, 

 from the same stratum, was Lagena globosa, named Endoso- 

 lenia miliaris(?) This division of the genus is exceedingly 

 proper, and shows the occasional value of examining these 

 creatures as transparent as well as opaque objects, characters 

 being thus sometimes discovered which would otherwise be 

 overlooked. Lagena globosa exhibits, when thus examined, a 

 long tube with a patulous extremity, projecting downwards from 

 the terminal orifice into the interior of the cell, sometimes being 

 so short as to be scarcely visible, at others so long as nearly 

 to reach the opposite extremity of the cavity. This character 

 Ehrenberg appears to have had in view, in employing his very 

 I 



