Simpson — A Revision of the Gorgonellidae. 109 



of the furrows, larger and deeper than tlie others, correspond in position to 

 the two large main canals. 



The spicules consist essentially of double-clubs; but these may be 

 elongated and narrow, and with so short a constriction as to appear like 

 warty spindles. The warts are large and close-set. The spicules are either pale 

 yellow or colourless. In the coenenchyma there are only double-clubs, with 

 warty, hemispherical heads, and a short constriction. The following measure- 

 ments, in millimetres, are typical : — 



0-07 X 0-05 ; 0-07 X O-O-i."). 

 0-05 X 0-03 ; 0-04 x 002.5. 



The spicules of the polyps are, on the whole, longer and narrower than 

 those of the coenenchyma. They are 



(1) Double-clubs, witli warty, slightly elongated heads, and with a slmrt 



constriction : O'OO X 0-02; 008 X 0-02; 0-06 X 0-025. 



(2) Tiiicker double-clubs, more like those of tlie coenenchyma : 



0-08 X 0-035. 



(3) Warty spindles (occasionally a constriction is discernible) : 



0-07 X 0-02. 

 Lucality. — Andamans, 20 fms. 



Specific Bingnosis. 



Colony branched in one plane; most of the branches arise almost 

 perpendicularly, but soon turn upwards ; they are flattened in the plane of 

 ramification, vary very little in thickness throughout their entire lengtli, and 

 terminate bluntly. The polyps are distributed for the most pait on the 

 non-iiattened aspects of the branches, and stand perpendicularly ; the 

 verrucae, when retracted, have the form of low, truncated cones, and may 

 even appear almost level with the coenenchyma. The oral opening is closed 

 by the inturned tentacles, wliicli tluis form a pseudo-operculum. The 

 spicules consist essentially of [I) broad double-chibs, with a slmrt 

 constriction and almost hemispherical ends; (2) elongated, broad double- 

 clubs, with very ruuiuled ends, and witli the same character as tiie previous 

 type; and (3) longer and narrower doulde-clubs, which may appro.ximate 

 double-spindles, and eventually spindles. 



XXVllI. Scirpearia ceylonensis n. sp. Figs. 105-107. 

 Among tlie Alcyonaria collected by I'rofessor lierdman in Ceylon is a 

 beautiful i)ranched specimen which was not described in the general report. 

 It has been found necessary to establish anew species to include it. 



