694 



THETIS SCIENTIFIC RESULTS. 



Sp. A. 



Sp. B. 



Sp. C 



19 



.. 18 



. 14 



10 



.. 9-5 .. 



. 8-5 



9 



.. 8-5 .. 



. 55 



5-5 . 



.. 5 



. 4-5 



1-4 . 



.. 1-2 .. 



. M 



1-5 . 



.. 0-8 . 



. 0-9 



3 



.. 25 .. 



. 2 



11 . 



.. 0-9 . 



. 08 



35 



.. 27 



. 26 



s is dark brown, 



with 



oeides. The siphonozooid-plate forms on the ventral border of 

 the pinnule a cushion that extends on to the keel. Pinnules 

 provided with one strong supporting row of needle-like spicules 

 on the ventral border only, otherwise without strong rays of 

 spicules. Autozooid zone abutting on the ventral spicule row, 

 supported by numerous small needles, and having several rows of 

 antozooids on each side." 



This diagnosis was founded on a single specimen of small 

 dimensions. Our three specimens agree with it in all essentials, 

 but are very much larger. 



The following table gives their dimensions in centimetres : — 



ijength of entire colony 



,, rachis 



,, stalk 



Breadth of rachis 



,, stalk 



,, keel in the middle 



Length of pinnules on ventral side... 

 Maximum breadth of pinnules 

 Number of pinnules on each side ... 



The colour of all three specimens is 

 purplish tinge on the keel and pinnules. 



Previously recorded from the Gulf of Siam. 



Genus SARCOPHYLLUM, Kolliker. 



SARCOPHYLLUM AUSTRALE, Kolliker. 



(Plate Ixxxii.) 



Sarcophyllum aush-ale, Kolliker, Anatom. Systemat. Beschreib. 

 Alcyonarien, 1 Abth. Die Fennatuliden, 1872, p. 116, 

 figs. 66, 67, 



Stations 28, 31, 32, 54. 



A number of specimens agree in the main with Kblliker's 

 account of Sarcophyllum australe. At the intersections of the 

 pinnules there are, on the ventral side, prominent transverse 

 cushions bearing minute siphonozooids. The spicules in the 

 interior of the lower part of the stem are relatively enormous, 

 white 8-shaped forms and a few discs, at once visible to the naked 

 eye. With regard to the other characters, we found some varia- 

 tion in the different specimens, variations that may well be 

 dependent on the age and vigour of the colony. For instance, in 

 the larger specimens there are numerous rows of autozooids on 

 the pinnules, in accordance with KoUiker's account, but a smah 

 and obviously young specimen has on most pinnules only one row 



