THE NAUTILUS. 101 



margin serrated ; lateral tooth long and curved. Interior very por- 

 cellaneous ; muscular scars slightly impressed. 



Localities : Claibornian of De Soto and McLeod's Mill, Miss., and 

 also in West Alabama, same horizon. 



This species closely resembles V. dalliana Nobis, but differs in the 

 number of ribs and the absence of one space which appears on the 

 other. It is also more rounded. 



Verticordia quadrangularis n. sp. PI. IV, figs. 22, 23. 



Shell stout, valves nearly quadrangular, rather thick and globose. 

 Surface with numerous coarse, rounded ribs. Entirely covered with 

 granulations ; deeply excavated behind the beaks ; possesses both 

 cardinal and lateral teeth. Muscular scars are deeply impressed. 

 Pallial line strongly marked. Internal basal margin showing the 

 ribs. 



Height and breadth equal, 7 mm. 



Several valves were found. This species belongs to the Section 

 Haliris Dall. The laterals are more strongly developed than in most 

 forms of this section. It is distinct from V. mississippiensis Dall in 

 having fewer and more rounded ribs and a more depressed lunular 

 area. 



CaXCELLARIA BIFOLIATA n. sp. PI. IV, fig. 24. 



Shell small, whorls six, first two smooth, the third partially so, 

 and the last three strongly cancellated. The ribs prominent, spiral 

 lines alternately coarse and fine. Umbilicus open, pillar lip with 

 two plaits. Shell appears to be turreted from the strong ribbing. 



Length 7 mm., breadth 4 mm. 



Locality : Oak Grove, Florida, Oligocene of Dall. 



This little species differs from C. mississippiensis Con. in its less 

 number of plaits on the pillar, its higher spire and open umbilicus. 



A NEW CRASSATELLITES FROM BRAZIL. 



BY WM. H. DALL. 



Among some dead shells dredged by the TJ. S. Fish Commission 

 in fifty-nine fathoms mud, east of Rio Janeiro, Brazil, were a num- 

 ber of valves which were inadvertently put away among a lot of 

 Astartes. On overhauling the latter, lately, these valves were found 



