FISSTJRELLIDiE. 203 



posito. Obs. A very pretty shell in Mr. 1131116/8 collection, in 

 some respects resembling F. Chemnitzii, but much thinner, and 

 not so much pinched at the sides or elevated at the ends. 



4. incarnata (f. 199), Krauss. — Oblonga, rosea, albo radiata, 

 tenuissime radiatim striata, antice angustata ; terminis paululura 

 elevatis ; foramine centrali, magno. Obs. Eose-coloured with 

 whitish rays very finely striated, the ends a little turned up, but 

 not so much so as F. hiantula: 



5. sella (f. 197), Sowb. G. B. 2. — Brevi, antice angustata; 

 lateribus paulo compressis, terminis valide elevatis ; fulva-rubes- 

 cente, minute striata, intiis grisea ; inargine lsevi, callo purpureo 

 circumscripto. Obs. An interesting saddle-shaped shell, which 

 has the peculiar pinched-up character of F. hiantula, etc., but 

 is much shorter. It has the ends raised more than any other 

 species. 



6. scutella (f. 207), Sowb. G. B. 2. — Subquadrata, depressa, 

 ltevi, concentrice minutissime striata ; terminis elevatis ; fulv&, 

 fuscis fasciis insequalibus radiata ; foramine magno, medio sub- 

 angustato. Obs. The upturned edges of this almost square species 

 seem to place it in this genus or group. 



7. nigrita (f. 196), Sowb. — Oblonga, depressa; lateribus com- 

 pressis, terminis elevatis ; radiatim striata, nigra ; foramine 

 maximo, ovali, centrali. Obs. Black, finely striated, with the ends 

 raised, and very large central fissure. 



8. complanata (f. 201), Sowb. G. B. 2. — Oblonga, depressa, 

 alba, terminis paululum elevatis, lineis impressis radiata, con- 

 centrice crenulatim minutissime striata ; intiis margine incrassato, 

 crenulato, callo lato circumscripto ; foramine maximo, ovali, cen- 

 trali. Obs. A thick shell with ends slightly elevated, and very 

 large fissure. 



9. limatula (f. 204), Eve. — Oblonga, depressa, striis impressis 

 radiata, lineis concentricis crenulatis cincta, pallida fulva, fasciis 

 griseis 6 inaequalibus radiata, intiis alba ; callo apicali circum- 

 scripto ; margine incrassato, minute crenulato ; foramine magno, 

 ovali. Radiated with impressed lines, which are striated by fes- 

 tooned or crenulated lines of growth. 



10. ^qualis (f. 200), Sowb. G. B. 2. — Oblonga, depressa, 

 lsevi, grisea, albo 12 radiata, terminis vix elevatis; margine 

 postico undulato ; intiis alba ; foramine magno, centrali. Obs. 

 Although the ends are scarcely raised, the general form of this 

 shell seems to place it near F. nigrita, etc. 



