HYPURGON SKEATI. 729 



On Hypurgon Skeati, a New Genus and Species 

 of Compound Ascidians.^ 



By 



I^oi'iia B. J. Sollas, B.Sc.L,oii<1., 



Batliiirst Stuflent of Newnliam Colleire. 



With Plates 34 and 35. 



Among the marine sponges from the Malay Peninsula 

 collected by Mr. R. Evans, of Oxford, at present Curator 

 of the Grovernment Museum in Greorgetown, Demerara, and 

 very kindly handed over to me by Dr. Harmer for description, 

 there were included two specimens of the new genus of 

 Synascida Didemnida, which I have endeavoured to describe 

 below. 



The locality nained on the collector's label in the case of 

 each of the two specimens is Pulau Bidang. 



The association of the Tunicate with a sponge was merely 

 fortuitous, and due solely to participation in the same surface 

 of support. 



The colony forms a thin sheet, little over 1 mm. in thick- 

 ness, adherent to the substratum. The colour in spirit is a 

 dirty yellowish brown. 



The appearance of the colony when examined by reflected 

 light under a low power of a binocular microscope is repre- 



1 1 take tlie Greek virovpyog^ and by lengtlieiiiiiEf the 6 get virovpyuv, 

 meaning a place where tilings arc made serviceable. 



