186 F1SSURELLID/E. 



14. muricata (f. 68), lire. — F. Peruviana simili, sed cos- 

 tellis nonnullis majoribus imbricatis, colore purpureo-nigrescente 

 prope foramen anuulata. Obs. I am strongly inclined to believe 

 this another variety of Peruviana, with some of the ribs enlarged 

 and imbricated. 



15. Mexicana (f. 26, 27, 28, 78), Sowb.— Oblonga, depressa, 

 tenui, radiatim striata, rubra, purpureo radiata seu nigra, intus 

 alba ; margine purpureo vel nigro, angusto ; foramine magno, 

 albo marginato. Obs. Oblong, striated thin shell, either black or 

 beautifully rayed with purple or red. Foramen large, edged with 

 white. 



16. Piulippiana (f. 30), Rve.— Mexicana similis, sed costellis 

 nonnullis extantibus subimbricatis; foramine magis angusto et con- 

 tracto. Obs. It is more imbricated than F. Mexicana, with more con- 

 tracted fissure. 



17. atrata (f. 71), Rve. — F. Philippianm simili, sed parva, 

 sublsevigata, late marginata; costellis nonnullis prope margiuem 

 undulatim imbricatis. Obs. It is like F. Phili/ppiana, but with a 

 comparatively smooth surface, stellated witli white near the apex, 

 with some of the ribs imbricated with peculiar undulatious near 

 the margin. 



18. exquisita (f. 32, 12S), Rve. — Oblonga, subdepressa, an- 

 tice paululum attenuata, tenui, alba, griseo concinne 18-radiata- 

 radiatim asqualiter costellata. ; costellis subnodulif'eris ; foramine 

 oblongo ; margine utrinque bilobato. Obs. Neatly rayed with 

 eighteen grey bands, and sculptured with numerous equal, granu- 

 lated, fine ribs. 



19. oriens (f. 19, 20), Sowb.- — Oblonga, depressa, solida, 

 leviter radiatim striata, lutea seu grisea concentrice fasciata, fasciis 

 griseis vel rubris radiata ; intiis albo margine griseo, angusto. 

 Obs. A much more solid and broader shell than F. Mexicana. 



20. picta (10, 11, 35), Gmel., Lamb. — Ovali, subconica, so- 

 lida, subkevigata, costellis leviter granulatis, lutea vel nigrescente, 

 purpureo vel nigro radiatim fasciata, intiis albo, griseo late mar- 

 ginato ; foramine oblongo, intiis calloso, circumscripta. Obs. One 

 of the larger species with broad margin of an inky colour, or 

 whitish with inky rays. F. Barwini (f. 35), Rve., seems to me 

 only a variety of this. 



21. polygona (f. 137, 177), &?^., G. B. 2.— Ovali, angulafa, 



