194' FISSURELMDJE 



apice elevato, costis tribus maxirais valide nodulosis posticis, sex 

 anticis magnis, cum minoribus interstitialibus radiata, lineis ele- 

 vatis distantibus concentricis cancellata' ; intus callo vix septiformi ; 

 foramine parvo, rotundo, antice posito et declinato. Obs. It is 

 not internally chambered as in F. calycalata. The three poste- 

 rior prominent ribs are very coarsely knobbed. 



68. excelsa (f. 154, 155, 156), Rve. — Ovali, elevata, liris 

 concentricis et costis elevatis inrequalibus acute imbricatis cancel- 

 lata ; apice elevato ; foramine parvo, subrotundo, antice posito. 

 Obs. F. alta, of C. B. Adams, has the cancellation a little coarser ; 

 but there are scarcely two specimens alike. 



69. nioro-ocellata (f. 160, 161), Rve. — F. excelsa simili, 

 sed maculis nigris, inter costis prope marginem positis. Obs. In 

 form scarcely differing from F. excelsa, but with a minute black 

 spot between each of the principal ribs near the margin. 



70. octagoxa (f. 159). Rve. L. excelsa simili, sed costis tribus 

 magnis posticis valide nodosis. Obs. The specimens so named in 

 Mr. Cuming's collection, which most nearly resemble the figure of 

 this species, do not appear much more "octagonal" than L. ex- 

 celsa ; but the three prominent ribs in front are singularly 

 knobbed. 



71. cyathulum (f. 152, 153), Rve. — Ovali, elevata, liris dis- 

 tantibus concentricis et costis distantibus acutis angulatim nodu- 

 losis radiantibus cancellata, fusco variegata ; foramine parvo, ro- 

 tundo ; apice elevato. Obs. This species, by the coarseness and 

 sharpness of its cancellations, holds a middle position between the 

 F. excelsa group and the next species. 



72. imbricata (f. 162), Sowb. G. B. 2. — Ovali, depressa, 

 sordide alba, fusco radiatim fasciata, liris concentricis et costis 

 alternatim inrequalibus acute imbricatis cancellata ; foramine parvo, 

 subcentrali. Obs. An ordinary patcllseform species, but cancel- 

 lated by concentric ridges and imbricated ribs. 



73. Listeri (f. 130, 131), B'Orb. — Ovali, depressa, liris con- 

 centricis et costis 20 principalibus cum alteris interstitialibus ro- 

 tundis obtuse noduliferis cancellata, fusca, alba, vel viridi radiatim 

 fasciata ; intus alba ; callo prope apicem subtruncato ; foramine 

 caeruleo marginato, supra medium posito, antice declinato, angus- 

 tato. Obs. This is the most coarsely cancellated among those 

 shells which have been included in the designation F. Grceca. It is 

 "West Indian. 



74. similis (f. 143), Sowb. G. B. 2.—F. Listeri simili, sed 



