28 GRAF ZU SOLMS-LAUBACH— MONOaRAPH OF THE ACETABULARIEiE:. 



apex, and very slight, evenly disposed calcification ; hair-scars on the top of the coronal 

 process mostly in pairs and obliquely placed, seldom in threes forming a triangle 

 pointing inwards. Spores globnlar. 



Size : diam. of cap 5-7 mm. ; breadth of coronal process measured radially 0-11 mm. 

 (Plate II. figs. 2, 6, 7.) 



Fitcus Peniculiis, R. Br. in Turn. Hist. I'uc. iv. p. 77, t. "l^^.—PolypJiysa aspergillosa, 

 Lamour., Polypiers flexibles, p. 252, t. viii. f. 2 ; Expos, moth. p. 20, t. 69. figs. 2-6. 



Sab. Australia : King George's Sound {B. Brown ; Sar^eij, no. 565, in mult, coll.) : 

 Swan Eiver? {Bntmmond, Hb. Kew); Port Phillip (Harvey, Hb. Berol. Strassb.). 

 Var. 3. Cliftoxi. {Polyphysa Cliftoni, Harv. Phyc. Austr. vol. v. tab. cclv.) 



Sporangial rays 10-16, not calcified at all, narrow, club-shaped, not vesicularly inflated, 

 3-4 times as long as broad. Hair-scars mostly three on the coronal processes. 



Size : diam. of cap 10 mm. 



Hab. Premantle, West Australia [Clifton, Hb. Trin. Coll. DubL, spec. orig. ; Hb. 

 Brit. Mus.). 



I am convinced, from the examination of the original specimen kindly sent to me, that 

 no sharp distinction can be drawn between this form and the usual A. Peniculus. Its 

 characters are found here and there in specimens of the typical form, in patches of 

 which single caps exhibit the habit of Bolyphysa Cliftoni. jS'ow the pairs and now the 

 triple hair-scars prevail for each coronal segment; but precisely on the specimens 

 collected by Clifton, which agree more than any others with the original of P. Cliftoni in 

 appearance, I find usually only pairs of hair-insertions. , 



12. AcETABrLARiA ExiGUA, n. sp. Minimc brevipedunculata. Disci radii pauci soluti, 

 elongato-ovati, obtusi, sursum curvati. Coronse superioris processus rotundato- 

 convexi, pilis ternis in triangulum dispositis prsediti. 



Small, 5-6 mm. high, short-stalked and immersed in the coral substratum ; disc formed 

 of few rays, 6-10, with basal portion constricted on both sides, bearing the knob-shaped 

 roundish coronal segment with three hair-scars ; sporangial rays seated on basal portion 

 and communicating with it, cucumber-shaped, curved upwards with long drawn-out 

 points. 



Size : diam. of cap 2*25 mm. ; breadth of coronal processes measured radially 

 0-046 mm. (Plate 11. figs. 1, 4.) 



Sah. Tropical Eastern Asia, Macassar, Celebes : a few sterile specimens sent me, 

 sub 926, by Mrs. Weber van Bosse ; Sikka, on the south coast of Elores, no. 1199 

 {Mrs. Weber van Bosse). The latter specimens, w^hich were fertile, were obtained from 

 a piece of coral on which Neomeris dumetosa was growing, after its decalcification. 



I am unable to say anything more definite as to the calcification of the sporan^-ial 

 membranes of this species, than that the few sterile specimens from Macassar were 

 uncalcified. The others came under my observation only after lengthened treatment 

 with acid. However, their sporangial rays are so widely separated from each other that 

 a union of these by meaus of lime-incrustation is scarcely likely. On this account the 

 plant finds its right place here. It is distinguished with the greatest ease from 



