PROM THE INDIAX AND PACIFIC OCEANS. 189 



those on the main branches sessile and single, those on the terminal twigs in 

 groups and generally on short stalks. Polyp spicules : crown with about 

 5 transverse rows ; points with 3-5 spicules arranged en chevron, larger 

 than those of the crown and with more pronounced warts ; tentacle spicules 

 comparatively large. 



Colour : Stem and branches deep red ; polyps bright orange. 



Hah. Admiralty Islands. 



Chironephthya retractjlis, n. sp. 



Colony consisting o£ one main erect branch and two short branches given 

 off at about 1"75 cm. from base. Polyps borne all round stem ; completely 

 retractile within calyx, which projects from stem and closes over the ]:)olyp 

 by all the spicules of the calyx converging in a point and not folding over as 

 in a Siplionogorgia. The polyps contract in the same way. Polyp spicules : 

 crown with about 5 transverse rows ; ]ioints with 4 spicules arranged 

 en chevron. 



Colour : Stem and branches cream^ with ci'inison-purplo polyps. 



Hab. Admiralty Islands. 



Genus Siphonogorgia. 



Siphonogorgia rotunda, n. sp. 



Stem and branches solid, smooth, rounded ; branching not very great. 

 Polyps borne all round stem, main and sub-branches ; lower part of stem 

 barren. Polyps nearly completely retractile, borne at right angles to stem 

 and branches. In the polyp there are about 5 spicules in each point directed 

 vertically upwards, below these about 8 spicules arranged en chevron, and 

 below these a crown of about 6 transverse rows. 



Colour : Stem and branches flesh-coloured ; polyps white. 



Hab. Bay of Bengal. 



Siphonogorgia pustulosa, Studer. 



Several branches of this species occur in the British Museum Collection. 



Hab. Admiralty Islands. 



Family Briareid^. 



G-enus Solenogaulon. 



SOLENOCAUI-ON TORTUOSUM, Gray. 



In the collection made by the Trustees of the Calcutta Museum this species 

 occurs in three varieties : — 



In variety A, the lateral branches are short and come off" in pairs on 



LINN. JOURN. — ZOOLOGY, VOL. XXX. 15 



