75 



SPECIES OF ACAMPTOGORGIA. 



Axis. 



Horny, almost black 

 at base, but light 

 brown in younger 

 branches. 



Horny, oval in sec- 

 tion. 



Spicules. 



Thin, yellowish. 



Horny, yellowish, 

 marked by a num- 

 ber of longitudinal 

 striae ; chambered. 



Yellow, darker in 

 older parts ; cham- 

 bered b_y vertical 

 partitions ; ridged 

 spirally on main 

 stem and branches, 

 longitudinally on 

 secondary branches. 



Oval in section in 

 older parts, cylin- 

 drical in younger 

 portions. 



Horny, brown at 

 base, yellow in 

 twigs ; chambered 

 in some places. 



(1) Warty spindles, straight or curved ; (-2) 

 irregular brain-hud spindles, with large flat 

 foliar expansions; (3) irregular quadri- 

 radiate forms. 



(1) Spindles; (2) quadri radiate types; (3) 

 irregular forms. 



(a) Coenenchyma ; (1) spindles straight or 

 curved ; (2) curved spindles, with a i<>li- 

 aceous expansion about the middle of the 

 convex side ; (3) U-shaped and irregular 

 forms ; (//) polyps spindles and clubs 

 with divaricate folia, covered by spines 

 which stand either perpendicularly or are 

 inclined to the surface of the spicule. 



(1) Triradiate, with large irregular processes 

 in the angles which often fuse, thus leaving 

 plate-like portions with perforations ; (2) 

 modified triradiate forms ; (3) spindles 

 and club-shaped half-spindles, curved or 

 straight, cither with very rough projections 

 or fairly smooth. 



(a) Curved warty spindles, with a bidentate 

 or otherwise toothed foliaceous part from 

 the middle of the curve ; (b) chilis with 

 irregularly expanded divaricate ends; (<) 

 small irregularly stellate forms ; (<?) forms 

 with four or more ravs. 



() Straight warty spindles ; (6) narrow 

 curved spindles, smooth terminally, warty 

 about the middle ; (c) large triradiate 

 forms, very irregular ; (<!.) smaller and 

 often simpler triradiate forms ; (e.) small, 

 very warty spindles, with a foliaceous 

 expansion about the middle. 



Colour. 



Black. 



Dark near tin- 

 base, but 

 gradually be- 

 comes lighter 

 in the younger 

 parts. 



Pinkish-red, 

 with white 

 papilla-like 

 verruca 1 . 



Deep crimson. 



Notes. 



Near .1. horrida, 

 Hickson, but differs 

 from it in the size 

 of the polyps and 

 in the size of the 

 spicules. 



