GRAF ZU SOLMS-LAUBACH— MONOGRAPH OF THE ACETABULARIE.E. 23 



4. AcETABULARiA GiGAS, n. sp. A. mctjori simillima scd major, niembranis coriaeois 



instructa, pilis in coronye superioris processibus octonis vel decenis subuniseriatis. 



Ejesembling A . major in all its characters, but much larger and more robust — the 

 veritable giant form of the genus. Stalk not completely present up to 25 cm. and more 

 in length; cap of 1*5 cm. radius; distinguished from ^. major by the firmness and 

 thickness of its membranes, by the much coarser and more detinite notch-marks of the 

 side- walls, in which it greatly exceeds A. Kilneri; rays, of which at least 76 were 

 present, after decalcification easily separable up to the base of the corona ; corona 

 superior consisting of narrow segments entirely without emargination and bearing 

 numerous (8-10) hair-scars, in one regular series on the inner and in two irregular series 

 on the outer side, the outermost having only short hair-j^rocesses ; segments of the corona 

 inferior from the apical view longish ovate, quite without emargination ; spores very 

 numerous in each ray, relatively small and globular. 



Size : breadth of corona superior 0'41 mm. ; spores 0"077 mm. 



Sab. In the seas of Eastern Asia. 



The specimen preserved in the British Museum from Herb. Hance was collected 

 floating in the sea, by Swinhoe, on the south-west coast of the island of Formosa, at 

 Liang-kiau. As G. Murray writes to me, there are specimens of the same species named 

 Androsaces Liizonis, and collected by Kamel in Luzon, in Herb. Sloane sub 163, fol. 2, 

 and 223, fol. 36. The photographs of this plant, nat. size, kindly taken by Mr. Gcpp, 

 show a diameter of cap 25-27 mm., and come between A. major and A. Gigas in size. 

 As to its other characters I cannot judge merely from the photograph. 



It is not possible to combine this species with A. major, in spite of the very minute 

 differences by which it is distinguished. Possibly, after a better examination of the 

 localities, farther similar forms may be found. It will then be possible to settle the 

 limits of the species, but meanwhile it appears to me at all events more expedient to 

 maintain apart such extraordinary forms in spite of the slightness of their distinguishing 

 characters. 



c. Side-walls of the sporangia! rays without distinct notch-ribs. 



a. Sporangial rays with apiculate margin. Apiculum in A. caraibica absent altogether, 



or often stunted on certain rays, but seldom on all. 



5. AcETABTJLAiiiA DENTATA, n. sp. Gracilis, disco infundibuliformi, tandem subexplanato. 



Disci radii pyramidato-acuminati, acuti. Processus coronse superioris pilis ternis 



uniradiatis instructi. 

 Cap-forming plant, small and delicate, with short stalk up to 2 cm. in height ; disc 

 terminal, small (about 2 mm. radius), at first basin-, later dish-shaped, a flat margin 

 appearing sharply toothed, often ultimately turned down. Sporangial rays 30-iO, some- 

 what strongly calcified all round, united, but after decalcification for the most part 

 separate, with very delicate, easily ruptured membranes, elevated pyramid-fashion at the 

 apex, with concave border and sharp pointed apiculum. Segments of the corona 

 superior small, somewhat crowded, longish ovate, externally very little or scarcely 

 emarginate, with three hair-prominences in one row ; corona inferior similar, but with 

 sharp bilobed margin. 



