227 



B. tHollis, Philippi. 



B. philippi, Studer. 



Branching irregular. 

 Anastomosis common. 



Colour brownish. 



Polyps translucent 

 white. 



Coenenchyma moder- 

 ately thick. 



Verrucae almost as high 

 as broad. 



On anthocodiae — well- 

 developed crown, also 

 points consisting of 

 three to four spindles 

 with one between. 



On the aboral surface of 

 the tentacles there is 

 a double row of small 

 spicules. 



Spicules : Outer layer : 

 short conical bodies ; 

 the broader end bears 

 finger - shaped pro- 

 cesses often united in 

 groups ; middle por- 

 tion smooth ; inner 

 end with four to six 

 processes often warty. 



Inner : very diverse, like 

 outer layer, also more 

 or less irregular 

 spindles. 



Anthocodiae : curved 

 spindles and strong 

 warty needles. 



Tentacles: small 

 spindles. 



Branching first at right 

 angles then more or 

 less parallel to the 

 stem. 



Colour light brown to 

 white. 



Coenenchyma moder- 

 ately thick. 



Polyps in ii-regular loose 

 spirals. 



Verrucae 1-1-5 mm. in 



height. 

 On anthocodiiE — crown 



and points, each point 



composed of three 



spicules. 



On the apices of the 

 tentacles there are a 

 few short curved 

 spicules. 



Spicules : As in B. 

 mollis. Also club- 

 shaped or truncated 

 conical structures, 

 the broader part of 

 which is directed out- 

 wards and beset with 

 numerous warty pro- 

 tuberances. 



The height to maxi- 

 mum breadth is as 

 0-067 to 0-065, and 

 0-06 to 0-054. 



B. studeri, Whitelegge. 



Branching generally at 

 right angles. 



Colouris pale yellowish- 

 white. 



Coenenchyma thin. 



Polyps alternate, rarely 

 opposite or arranged 

 in rather loose ir- 

 regular spirals. 



Verrucse 0-8-1 mm. in 

 height. 



Crown and points ar- 

 rangement on the 

 anthocodiae ; each 

 point consists of three 

 spicules. 



Spicules on aboral sur- 

 face of tentacles 

 arranged " en chev- 

 ron ". 



Spicules : (1) Cortical 

 spicules longer than 

 broad, 0-04 x 0-035. 



(2) Deep=seated spi- 

 cules — broad star- 

 shaped warty. Dia- 

 meter, 0-05-0-2; 

 height, 0-03-0-1. 



(3) Collar spicules 

 curved sharp or blunt 

 spindles with few 

 distant spines, 0-35 x 

 0-03; 0-3x0-02. 



(4) Tentacle spicules 

 slightly spinose fre- 

 quently dentate at 

 apex, 0-15 x 0-03; 

 0-1 X 0-02. 



"Investigator " specimens. 



Branching first perpen- 

 dicularly then sub- 

 parallel to the stem. 



Colour creamy-white. 



Coenenchyma moder- 

 ately thick. 



Polyps alternate or 

 subopposite, some- 

 times in irregular 

 spirals. 



Veri-ucae 1 mm. in 

 height. 



Crown and points on 

 anthocodiae ; points 

 made up of three 

 spicules. 



On aboral surface of 

 tentacles spicules 

 arranged " en chev- 

 ron ". 



Spicules : Irregular 

 discs with central 

 boss, 0-12 X 0-18; 

 "Capstans," 0-07 x 

 0-07 ; " Stars," 0-05 

 X 0-05. 



Spindles, 0-17 x 0-034, 

 0-25 X 0-025. 



