TRIBE I. ASTR^ACEA. 245 



50. ASTHMA FAVULUS. (Dana.) 



A. convexa. Corattum subcellulosum ; cellis 1"' latis, angulatis, inter- 

 dum 3'" longis, viz prof undis, intus obsolete coronatis ; collibus viz 1'" 

 crassis, Gothicis vel rotundatis, abruptis, integris; lamettisfere cequa- 

 libus, suUntegris: transverse secto, stellis viz multiradiatis, cum cel- 

 lulis simplidbus; septis viz '" crassis, fere solidis, cellulis paucis : 

 texturd sub cellis subtilissime cellulosd. 



Convex. Corallum somewhat cellular, cells 1 line broad, angular, 

 occasionally 3 lines long, rather deep, obsoletely coronate within ; 

 ridges scarcely a line thick, Gothic, or rounded, abrupt, entire ; 

 lamellae nearly equal, subentire : in a transverse section, stars 

 scarcely many-rayed, with the cellules simple; septa scarcely J 

 a line thick, nearly solid, with occasional minute cellules: texture" 

 below the cells very minutely cellular. 



Plate 13, fig. 7, cells of corallum, natural size; 7 a, section of cells 

 and ridges, showing also profile of lamellae ; 7 b, transverse section of 

 corallum, natural size ; 7 c, vertical section of the same. 



Feejee Islands. Ezp. Ezp. 



This species has much smaller cells than the sinuosa, which it some- 

 what resembles, and they are scarcely coronate within ; besides, the 

 cellules internally below the cells are very minute, and singularly 

 neat and regular. The lamellae also are not so even, some few pro- 

 jecting a little more into the cells than others. 



51. ASTR.EA CERIUM. (Dana.) 



A. convexa. Corattum subcellulosum, robustum ; cellis angulatis, 1J'" 

 latis ; collibus angustis : transverse secto, stellis viz multiradiatis, 

 (ferme 12 radiis majoribus) cum cellulis simplidbus, et apertis ; septis 

 solidis, fere $" crassis : verticaliter secto, cellulis bene cequalibus, 

 "' latis, et septis solidis. 



Corallum subcellular, firm ; cells angular 1J lines broad ; ridges quite 

 narrow : in a transverse section, stars scarcely multiradiate (about 



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