i<>r a short distance up the aboral surface. Higher up the spicules assume a position 

 parallel to the length of the tentacle. 



Tin 1 spieuh's are spindles, either straight or curved, with rough warty pro- 

 tuberances, and a very few quadriradiate forms. The following measurements 

 were taken of length and breadth in millimetres : 



Spindles, O'lxO-05 ; 0'25x0'05; 0'5x0'07; O'GxO'08; 0'65x0'05. 

 Quadriradiate forms, 0'14 from tip to tip one way. 



,, ,, 013 ,, ,, the other way. 



Locality : Station 222 ; 13* 27' N., 93* 14' 30" E. ; 405 fathoms. 



Sympodium pulchrum, u. sp. Plate VI. fig. 7. 



This species is represented by a large colony spreading over the surface of a 

 sponge skeleton. 



The stolon is thin and ribbon-like in parts, but it also spreads out into flat 

 expansions, with a stringy appearance on the surface. 



The polyps occur all over the surface, arising singly or in twos and threes in 

 close proximity at the ends of the branches of the sponge on which they spread. 



The calyces are usually marked by eight longitudinal ridges, which are more 

 distinct in the larger polyps. The spicules on the calyces are arranged with the 

 long axes parallel to the length of the calyx, and form a complete compact cover- 

 ing. The calyces vary in length from l"2-7 mm., and in basal diameter from 

 1-1-2-5 mm. 



The anthocodise are capable of complete retraction, and are all more or less 

 retracted, but several even in this condition measure slightly over 3 mm., thus 

 giving the larger polyps a total height of over a centimetre. The spicules, which 

 form a dense covering, are arranged distal ly in a transverse band, from which 

 points project at the bases of the tentacles. On the tentacles the spicules are at 

 first arranged en chevron, but soon run parallel to the long axis. The baud 

 continues up the aboral surface of the tentacle and gives off obliquely transverse 

 spicules to the sides. 



The spicules are spindles, straight or curved, with rough warty protuberances. 

 The following measurements were taken of length and breadth in millimetres : 



0-8 x 0-075 ; 0'5 x 0'04 ; 0'15 x 0'04. 



Locality : Station 284 ; 7' 55' N., 81" 47' E. ; 506 fathoms. 



