22'2 



are overgrown by polyi>bearing coenenchyma, as many as eight to ten polyps 

 arising from one gall. 



The polyps occur mainly on two sides of the stem and branches, but owing 

 to a spiral twisting of the stem in some places this is not always obvious. 

 The verruccB are small and dome-like and are separated by intervals of from 

 1 to 2 mm. They are sub-alternate in position. The tips of the twigs are occu- 

 pied by two almost opposite jjolyps. The anthocodise are completely retractile. 

 There is a distinct tentacular operculum consisting of a collaret of two to three 

 rows of curved spindles and eight points each composed of four to five spicules 

 with no definite arrangement. This can be wholly withdrawn so that only the 

 tips appear within the verructe. On the verrucas the spicules are arranged 

 longitudinally and in most cases a segregation into eight groups is discernible, 

 presenting a slightly serrate margin around the aperture. 



The s})icu]es are essentially spindles and are colourless. The following are 

 the more imi)ortant types with measurements length by breadth in milli- 

 metres : — 



{(/) Cojnenchyma : (1) Spindles covered with tuberculate wails, straight, 



curved or S-shaped, 1-2 x 015 ; 1 x 0-12 ; 09 x 

 0-1 ; 0-8 X 0-08 ; 0-6 x 0-05. 



(2) Small warty cylinders some approaching a capstan- 



shape, 0-11 x006; 01 xO-04. 



(3) Small crosses with a very distinct X-shaped marking, 



015 X 0-1 ; 01 xOl. 

 (//) Anthocodiai : Warty spindles, 0-35 x OOd ; 0-3 x 005 ; 025 x 0-04. 

 Locality : Andamans. 



GENUS BEBRYCE, Philippi. 



Philippi, " Archiv. f. Naturgesch.," Bd. i. p. 35, 1842. 



Kolliker, " Icon. Hist.," pt. ii. p. 137, 1865. 



G. von Koch, " Fauna und Flora d. Golfes von Neapel," xv. 1887, p. 54. 



This genus was established by Philippi in 1842. INIilne-Ed wards did not 

 accept it and noted the opinion of Valenciennes that the genus was founded 

 on a gorgonid axis on which Si/mpodhnii coralluides Avas growing parasitically. 

 Lacaze-Duthiers took the same view. According to Philippi Bebrijce had a 

 character which surprised Milne-Edwards, riz., freely projecting non-retractile 

 polyps hitherto known in no gorgonid. By this, however, he meant the verrucae. 

 In Bebrijce the i:>olyps are retractile just as usual. 



The following may be regarded as the accepted generic diagnosis ; The 

 colony is branched, with a thin ctenenchyma and relatively high sub-cylind- 

 rical calyces which are alternately arranged on the axis. The spicules of 



