- 114 - 



Remarks .- This species, also representee' by a single valve, 

 is closely related to A. dent era and undoubtedly belongs in the 

 same genetic series. Differences between them involve factors of 

 proportions, outline and sculpture, Aside from the difference in 

 size, ^'hioh may be of no significance, subcandeida is lower, more 

 compressed, especially posteriorly, the base has a decided slone; 

 the umbo is lov/er, less inflated, more anterior in position; the 

 sculpture sharper and. more obviously reticulated and the cardinal 

 area extends in front of the umbo. 



Oc 



currence.- lower 1.1 ioceiie : Bowden beds, Bowden, Jamaica. 



