oowei o;,' var . 11 . 



?astroohaena ovata Sovverb:; vsr. rotrmda Dall, 1808, Trana . 



./agiier 7ree liist. 3ci., Philadelphia, vol. 3, pt . 



4, p. 825. 

 ? ^-agtrochg cr^ rot nnda "Dall, 1015, ■^ttII. U. 3. I!at . ., no. 



30, p. 157, pi. 19, fig. ?. 



Descrj-Qt ion. ^ "Shell r eceinbliiip- the ovata of the -.v-e 

 size, but not attainiiog so large a size as the adult ova '.a , 

 with a more rounde'' posterior end rather shorter gape, the m^o- 

 phore dfcidedly larger, wider, and more ooncpicuonr: . Lon. 7, 

 1 at . 5.5, diam. 2 . 8 mm . " 



"The diiferenee "between the recent and the 01i!?ocene 

 shells are so slif^ht, an'"'' the rarE-e of variation in the liv- 

 i., .= oeGi::ieno so .iaj-':ei, i;;iab I feel ;i. willi. , a the 



distinctive characterc above mentioned seem - , 



the foo;:il cliell s more than v ■ rlet-^l •• -nk luitil I een a 



larger numoer o_' ^ ::e 'ji.x'n., . '' ' Jall , 



T^-pe locality .^ Bowden, Jamaica. 



Shell er.F,ll, thin, sleu'^er, el o: 

 convex, vi an a promi^^en ; .j. , ^i. 



anterior end ; e 1 3iirface .'elatl ent 



