- ?Ar\ _ 



Section Mantellum (Bolten) H. a/id A. Adams. 

 LI::A (KAl^ITELLUlvI) DAILI n. sp. 



Description .- ^hell sraall, fragile, ohlirji^ely elongated, 

 v;ell inflated; gaping slightly at the postero-ventral and antero- 

 dors'^1 angles; dorsal r^ar-ins short, straight, the -nosterior long- 

 er; anterior end roimdet"! above, slightly insinuated at the dorsal 

 margin hy the gape, ohliquely truncated helov/; truncate! poster- 

 iorly s-;h'ipr<^'^'I el to the anterior trur'-catic. ; .:^s.e. rou/aded; ex- 

 ternal surface without racial sculpture except for a few, feehle, 

 hsrely visible narrow radials near the ventral mar^^in, extending 

 over almost hal. f the length if the s'- ell in t-'p -n-ir-^-^f-ro-ventral 

 region; a few weak, fine, iiiin, raised concentric lines present 

 on the vent--al half of the shell; the entire surface covered with 

 microscopic vermicular ^-erkiags, "■"'^-emhling' camptonectes striat- 

 ion, most prominent on the umbo; cardinal area narrow, the liga- 

 ment pit wide, shallow, not nrojectirig into the cavity of the 

 shell; interi'-ir of the valve with faint radial ^^-^^'"^^■—■9^ in the 

 postero-ventrol region. 



I)im.ensions .- Median lat. (measure'.] along: a line lerpendi- 

 c;iar to the obllj-..ie a: is) 5 mm.; max. alt., ? "■'jn. ; semidiara., 

 1.8 mm.; length of hins^e, 1.5 mm. 



