480 SYSTEMATIC PALEONTOLOGY 



common than its near relative above referred to. Its geological range is 

 from the Upper Oligocene to Eecent. 



Occurrence. — St. Mary's ( ?) Formation Crisfield well (776 feet). 



Collection. — Maryland Geological Survey. 



Genus SAGRINA d'Orbigny. 



D'Orbigny first used the generic term Sagrina for a biserial variety of 

 Uvigerina with longitudinal costse. Later he placed under the same 

 a rough dimorphous Textularian which was distinguished from the genus 

 Gandryina in possessing a terminal raised aperture. 



Parker and Jones have more recently applied the name Sagrina to a 

 group of dimorphous Uvigerince which are typically textulariform in 

 their primordial segments and nodosariform in their later ones. This 

 dimorphous character is, however, not always followed and Brady has 

 shown in the Challenger Report a number of forms wholly nodosarian in 

 their growth. The shell is hyaline, perforate, and the exterior is sub- 

 ject to great variation of surface decoration. The aperture is in the form 

 of a tubular raised neck with an everted phialine neck. 



In existing oceans Brady says the genus is common in shallow waters 

 of tropical seas. As a fossil it is not known prior to the Miocene epoch. 



Sagrina spinosa n. sp. 

 Plate CXXXIII, Fig. 11. 



Description. — This peculiar and interesting species somewhat resem- 

 bles S. raphanus Parker and Jones, but differs from the latter in several 

 particulars. The surface ridges in our specimen end in a series of pro- 

 jecting points which at the distal end become definite spines, though 

 these are short and stubby. Again there are arched cross ridges between 

 these costse which while they may not indicate the internal structure of 

 the chambers serve to mark their location. The aperture ends in a' 

 neatly raised phialine everted lip with central rounded orifice. 



Occurrence. — Choptank Formation. Jones Wharf. 



Collection. — Maryland Geological Survey. 



