73 



SPECIES OF ACAMl'TOOOUUIA. 



Axis. 



Horny, yellow brown 

 to yellow, glisten- 

 ing, longitudinal 

 strise, rigid to 

 flexible. 



Spirulcs. 



Irregular warty plates or spindles with long 

 vertical process, digitate in verruca and 

 larger ; the warts and tubercles are always 

 granular. 



Rigid, horny, yellow, A basal tuberculate piece or plate parallel 

 with white core, to the surface, with a vertical tuberculate 



quite translucent, 

 chambered, rigid 

 except in twigs. 



Horny, black or 

 brown, with core 

 divided into cham- 

 bers by vertical 

 partitions. 



Horny, brown in 

 older parts, white 

 at the apices. 



process ; also small irregular spindles, 

 some almost double ; verruca spictiles 

 have a spindle-base transversely disposed 

 and a vertical projecting shaft. The 

 tubercles are never granular. 



Tripods with rough tubercles on legs and 

 smooth projecting spines ; in calyces two 

 limbs to each spicule, in ccenenchyma 

 three, four also found ; the limbs may be 

 foliaceous and so interlock ; also slightly 

 bent tuberculate spindles. 



Spindles slightly bent, with spiny warts 

 along one side, and, on the convex side at 

 one end or about the middle, complex 

 foliar prominences. In collaret, curved 

 spindles with few spines ; in operculum, 

 flat spiny spindles arranged in eight groups 

 of three. 



Horny, brown, with In polyps, three-rayed with foliaceous expan- 

 the central core sions from two of the three rays ; the third 

 a spike standing perpendicularly to the 

 others. In coenenchyma, bent spindles 

 with short branched expansions on the 

 convex side, and also smaller forms of the 

 polyp spicules. 



divided into cham- 

 bers. 



Horny, brown, not In comenchyma, bent spiny papilliform 

 longitudinally stri- I spindles, frequently with short foliar 

 expansions. In calyces, three-rayed stars ; 

 in collaret, roughened spindles truncated at 

 one end. 



atecl, slightly flat- 

 tened on the stem, 

 flexible in branches 

 and soft. 



Horny, feebly flexible, 

 yellowish-brown. 



In cu'iienchynm, curved spicules, frequently 

 with foliar prominences. In calyces, tri- 

 radiate with third ray shortened and with 

 a bifoliar appendage with dentate margins. 

 In collaret, long-curved spicules with tVw 

 spines. In operculum, flat, spiny, and 

 armed at one end with smooth project ions. 



Cnlr.lir. 



red. 



Whitish togrev. 



White. 



Light brown. 



Stem brown, 

 oral region of 

 polyps with 

 violet tint. 



Whitish. 





With considi-rable rc- 

 .-i-mblanri- to A 



. 



bebrycoides, von 

 Koch. 



Verrucas very like 

 teasel heads. 



Similar to A. Jruti- 

 -, but 



polyps larger, and 

 quite distinct in 

 colour. 



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