358 Mr. J. Miers on the genus Thinogeton. 
marked by ten prominent fleshy ribs, tapering gradually into the 
peduncle : in Cacabus, on the contrary, the calyx is at least three 
times the diameter of the base of the corolla, is more or less 
globular, of extremely thin and transparent texture, venously re- 
ticulated, plicated and deeply 5-angular, the angles being saccate 
at base; the peduncle in Thinogeton, after the impregnation of 
the ovarium, becomes immediately deflexed, grows to four times 
its former length, and is afterwards much thickened at its apex : 
the teeth do not increase in size, but the tube, as in Physalis, 
becomes somewhat vesicular, reticulated, and 10-ribbed ; expands 
to three times its former length, and five times its breadth, 
its texture remaining much thicker, when compared with the 
greatly inflated and delicately membranaceous web, which encloses 
the berry in Cacabus. The structure of the ovarium is similar 
to that of the last-mentioned genus, but the furcated placentz 
are again divided, and secrete an aqueous juice, in which the 
seeds are nourished ; the dissepiment remains membranaceous, 
but the placentz at length become hard and woody, and the cells 
dry and capsular, while in Cacabus the pericarp, the placentz 
and the dissepiment are all more or less membranaceous. The 
fruit, though somewhat fragile, does not burst by an opercular 
line, as in Hyoscyamus, because of the very gradual attenuation 
and absorption of its epigynous gland into the substance of the 
pericarpial membrane, not less than on account of the thickening 
and indurescence of the dissepiment and placentze : for these rea- 
sons, it does not open bya sharp horizontal le, asin that genus, 
but remains a brittle, dehiscent putamen, with a tendency to 
break by an irregular transverse line in its thinnest part. 
Tuinoceron, Bth. Char. ampl.—Calyz tubulosus, 10-striatus 
ad medium 5-partitus, laciniis acutissimis, erectis, subzequa- 
libus, persistens et augescens. Corolla infundibuliformis, tubo 
imo coarctato, dein gradatim amphito, 15-nervio, limbo 5-fido, 
lobis brevibus subineequalibus, 3-angularibus. Stamina 5, mn- 
clusa, inequalia, corolla 3-plo breviora ; filamenta in coarc- 
tationem tubi inserta, hine fornicata, erecta, gracilia ; anthere 
conniventes, oblong, apicifixee, 2-loculares, loculis parallele 
adnatis, rima marginali dehiscentibus. Ovarium ovatum, 2- 
loculare, dissepimento tenul, placentis cruciformibus utrinque 
adnatis, in locellis fureatis, carnosis, undique ovuligeris. Sty- 
lus leviter curvatus, filiformis, staminibus excedens. Stigma 
spathulato-dilatatum, compressum, sub-2-labiatum. Bacca ex- 
sicca, intra calyeem auctum vesiciformem, venoso-reticulatum, 
10-costatum inclusa, subglobosa, cortice coriaceo, superne cras- 
siore, inferne subfragil, evalvato, 2-locularis, placentis fur- 
eatis coriaccis, seminibus plurimis gerentibus. Semina com- 
