Report on Foraminifera. By F. W. Millett. 549 



It is more abundant than the typical form, and the distribution is 

 the same. 



Mimosina hystrix sp. n., plate IV. fig. 14. 



Test oblong ovate ; tri-serial in the earlier stage, subsequently 

 becoming bi-serial. Chambers inflated, those of the bi-serial portion 

 provided with a spine at the rounded peripheral margin ; sutures 

 sunk. Aperture : both orifices circular or oval with a bordered margin. 

 Length 0-50. 



In some respects this form resembles Ehrenhergina hystrix 

 Brady, but there is no real affinity. It differs from the other 

 species in its dimorphous character as well as in the form and 

 position of the sutural orifice. 



It is abundant, but more local than the other species. 



