132 



chevron," the innernaost being generally very small. On the aboral surface of 

 the tentacles there is a dense double row of spicules ; these are arranged trans- 

 versely, but slightly " en chevron ". 



The colour is orange-yellow to Itrown ; the polyps are distinctly of the 

 latter tint. 



Locality : Gaspar Strait, E. Coast of Sumatra. 



Previously recorded from Funafuti, Whitelegge. 



Siphonogorgia rotunda, Harrison. 



A portion of what has evidently been a large colony, in the Wood-Mason 

 collection, approaches the description given by Miss Harrison in her preliminary 

 note ("Jour. Linn. Soc," vol. xxx., 1908), and as it differs from others already 

 described we rank it under the above species for the present and wait for her 

 fuller description. It is pinkish-brown in colour and is 80 mm. in height and 

 30 nnn. in breadth. The verructe are very indistinct and the anthocodiai are 

 white. The architecture of the latter agrees with Miss Harrison's description. 



Siphonogorgia media, n. sp. Plate III., fig. 12 a, b and c ; Plate IX., 



figs. 7a, 7 b. 



A single specimen, 5 cm. in height and 7 cm. in diameter at the base, taper- 

 ing gradually to -5 cm., represents this species. At LO cm. from the disc of 

 attachment a branch arises perpendicularly from the main stem and measures 

 lo cm. in length and '5 cm. in diameter, tapering to 4 cm. The whole colony is 

 stiff' and rigid and is supported by a dense felt-work of very large interlocking 

 spicules. The colour is a creamy-white but slightly pinkish near the base. 



Polyps occur over the whole stem and branch, but with no definite arrange- 

 ment. They are separated by distances of about 4 mm. except at the tips where 

 they are much closer. The polyps are large, measuring 2 mm. in length and 

 1"75 mm. in diameter, i.e., when they are exserted but with the tentacles in- 

 folded. They are retractile within fairly prominent calyces, formed by a definite 

 arrangement of large longitudinally disposed spicules. 



On the anthocodia* the " crown and points " arrangement of spicules is very 

 marked being visible even to the naked eye, the points projecting well l)eyond 

 the infolded tentacles. The "point " consists of two very definite club-shaped 

 spicules touching almost throughout their entire length and having a curved 

 spindle as a base to the triangle. Within the triangle the small space contains 

 a single spicule. The crown is composed of about twelve rows of curved 

 spindles which interlock and diminish in size as they pass down the neck. 



The spicules of the general coenenchyma are opaque, white, variously 

 twisted, very large spindles covered with multi-tuberculated warts. They have 

 the following measurements in millimetres : 475 x 055 ; 4 x 0"5. 



