ovuLA. Panama Shells. 31 



specimens, of which three are quite perfect. They were 

 found on the reef at Panaaia. A fragment of a seventh was 

 found on the beach. 



3. OTula IVeglecta.— Nov. 



sp. 



Shell rather slender : dark violaceous red, sometimes with 

 as light tinge of brown; paler on the lip : smooth, sometimes 

 with microscopic revolving striro : aperture very narrow in the 

 posterior three-fifths, wider anteriorly ; slightly produced at 

 both extremities, and slightly emarginate anteriorly : lip well 

 thickened, nearly straight along the middle : columella acu- 

 minate at both extremities, with a longitudinal impressed line, 

 and a callus behind it. Length, .31 inch ; breadth, .1 inch. 



This species resembles the fig. of 0. rufa, Sowb, which is 

 represented as much larger, with a broader aperture. 



Station. — With O. avena, which see. 



Habitat. — Panama. — C. B. A. ! 



We collected 13 specimens on the reef. 



4. Ovula Tariabilis.— Nov. sp. 



Shell very slender : usually white, with a slight tinge of 

 rufous, with the lip opaque white ; sometimes of a rich red 

 purple : smooth : aperture not very narrow, a little widened 

 anteriorly, moderately produced, effuse, and slightly inflected 

 posteriorly ; obliquely emarginate anteriorily : lip well thick- 

 ened : columella with a longitudinal keel, acute and obliquely 

 produced anteriorly, posteriorly somewhat biplicate. Length, 

 .54 inch ; breadth, .15 inches. 



This shell resembles O. inflexa, Sowb., but is more slen- 

 der. Perhaps on comparison of specimens, they may be proved 

 identical. O. uniplicata, Sowb., is larger, with a wider aper- 

 ture. 



