206 MR. BRODERIP’S DESCRIPTIONS OF CALYPTRIDA. 
Long. | poll., lat. +4, alt. 5%. 
Hab. ad Panamam. 
The apex of this very flat species is lost in the margin. 
Found under stones. 
I have before me several more of this family, some of which may be new; but I 
hesitate to describe them till I have more satisfactory evidence that they are not 
varieties or species already recorded. Many shells of Calyptreide are figured by 
Martini, Lister, and other authors ; and it is not improbable that some of the species 
above described may have afforded the subjects from which the engravings were made: 
but the figures are for the most part so doubtful that no dependence can be placed 
upon the majority of them, and they rather embarrass than assist the inquirer. 
