Species v/hioh v;ere obtained from the Bowden marl at the seme 

 time." (Call, 1000). 



Type locality .- Bowden, t-'amaica. 



Heniarks .- This species is disting'uished oy its lev;, elonp:- 

 ate outline and relativelj; sharp posterior carina, the shell "be- 

 ins slirhtly depressed in front of the carina. The larp-est of the 

 few valves at hand ±3 larger than the type, with the following 

 'iinensi'-^ns: len?-th, 8 nm. ; alt., 4 ma,; diara., 1.5 nun. A closely 

 related species. _T. agria Dall (l), is foimd in the ^'ak Grove 



(1). lOG. cit., -.->. 1027, -j1. 1-6, ii---. -'1, 1900. 



"beds; it is slightly larp'er, more flexed posteriorly and v;ith 

 more prominent sculpture. The ?lioc?^ne ^. i;m"bra Dall (?) reaches 



(2). loc. eit., p. loss, r>l. 46, fig. IS, 1900. 



a larc-er size and is slirhtly less inflated; otherwise it is very 

 similar to -oharcida . 



Oe ear re nee .- Lower Iliocene : Bowden beds, 3owden-, Jamaica 

 (Dall, 19 -^O). 



