260 PYRULA. 



P. DECUSSATA, Wood. PI. 6, fig. 34. 



Spiral ribs small, distant, the wide interstices with three or 

 four revolving threads, of which the middle one is usually more 

 prominent; closely longitudinally ridged, interrupted by the 

 spiral ribs; yellowish brown, maculated with chestnut on the 

 ribs. Length, 3-5 inches. 



Panama to Cape St. Lucas, L. Gal. 



A common and beautiful species, of which a short, swollen 

 variety was described by Sowerby as P. ventricova. Reeve gives 

 no habitat, and in the Thesaurus, where it is figured in error as 

 P. reticulata, it is assigned to the Indian Ocean. 



P. PAPYRATIA, Say. PL 6, fig. 35. 



Shell slimmer than P. reticulata, similarly but more delicately 

 sculptured ; brownish white, or blush white, deeper brown within 

 the aperture, sometimes faintly longitudinally strigate with yel- 

 lowish brown, but always without maculations. 



Length, 3-4 inches. 



Beaufort, N. C., to West Indies. 



A common species on our Southern Coast. It is not figured 

 either in Reeve's Iconia or the Thesaurus, but Sowerby figures 

 it in his " Genera of Shells " in error for P. reticulata, Lam. It 

 is P. gracilis, Phil. 



P. FICUS, Linn. PL 5, fig. 29 ; PL 6, figs. 36, 37. 



Abbreviately pyriform, closely, minutely, spirally flat-ribbed, 

 longitudinal sculpture minute, scarcely visible; whitish, inter- 

 ruptedly maculated and clouded with faint chestnut, interrupted 

 by several faint white spiral bands upon which there are darker 

 chestnut maculations; interior brownish or purplish. 



Length, 3-4 inches. 



Red Sea, Indian Ocean, Singapore. 



Reeve changed the name to l&uigata, because Linnaeus in- 

 cluded P. reticulata in his original description. 



Viir. PELLUCIDA, Desh. PL 6, fig. 37. 



Orange-brown, with five or six equidistant spiral series of small 

 distant chestnut spots, somewhat regularly arranged. 



P DUSSUMIKKI. Yalenc. PL 5, fig. 30. 



Narrowly pyriform, encircled by numerous small spiral flat- 



