32 



many of the ovals and four-sided forms send out irregular somewhat flattened 

 branches which may again branch. Some measurements are : Spindles 1'2 

 mm. X 024 nmi. ; rods 0'48 mm. x O'lo mm. ; clubs 042 mm. x 0'21 mm. ; ovals 

 up to 06 mm. x 03 mm. 



Canal-wall spicules : (a) In the stem ai'e short, thick si)in(lles, thickly 

 covered with regularly arranged rough warts and measuring up to IS mm. x 

 0"3 mm. ; also a few small globular forms with fewer and less rough warts. 



{/>) Those of the stalk may be divided into two series, a rough and a 

 smooth — the rough similar to the stalk cortical spicules, spindles, clubs, ovals, 

 etc., the spindles measuring up to 08 mm. x 018 mm. — the smooth series 

 containing irregular, flat spindles, measuring 0"42 mm. x 012 mm., irregular 

 flat three- and four-rayed forms, oval and triangular forms, all of which may 

 be greatly branched. 



Colour — Stalk and principal branches dark Iirownish-grey ; stem and 

 smaller branches a lighter shade of the same ; polyp-stalks and polyps reddish- 

 brown ; tentacles greyish. 



Locality : Andamans Coast, 13 fathoms. 



Dendronephthya arbuscula, Henderson. 



The colony is large, somewhat bush-shaped, mostly developed in one plane, 

 with a long stalk, and measures 11 cm. in length and 8 5 cm. in maximum 

 breadth. 



Piij. 19. D. arbuscula. — From stalk cortex. 



Fig. 18. D. arbuscula. 



The stalk or trunk is long and rigid, granular in appearance, leathery in 

 texture, measuring about 5"6 cm. in length, and having its upper part covered 

 by the reflexed lower branches. 



The polyparium is large, much flattened, with no regular outline owing to 

 the arrangement of the principal branches. From the lower part of the stem 



