ON POLYZOA FROM the mergui archipelago. 



121 



On the Polyzoa and Hydroida of the Mergui Archipelago col- 

 lected for the Trustees of the Indian Museum, Calcutta, by 

 Dr. J. Anderson, F.R.S., Superintendent of the Museum. 

 By the Eev. Thomas Hincks, B.A., F.R.S. (Communicated 

 by Dr. John Anderson, F.R.S., F.L.S.) 



[Head 20th January, 1887.] 



(Plate XII.) 



Dr. Anderson has placed in my hands for examination the 

 Hydroida and Polyzoa which were obtained in the course of his 

 investigations in the Mergui Archipelago. I have already (Annals 

 and Mag. Nat. Hist, for May 1884) given some account of the 

 Polyzoa, and described and figured several new forms. A list of 

 these, with a diagnosis of each, is included in the present report. 



A small quantity of material has since been forwarded to me, 

 which has yielded one or two interesting species hitherto un- 

 described, and it also enables me to extend the range of some 

 well-known forms. Seven additional species have been noticed, 

 which, with the fourteen already recorded, make a total of 21 

 species of Polyzoa from the Burmese waters. 



Six species of Hydroida have been recognized, of which two 

 appear to be undescribed. 



The new material is insignificant in amount, aud its chief 

 interest centres in a fine mass of Nellia oculata. Busk (fortunately 

 preserved in spirit), which proves to be rich in minute forms 

 both of Polyzoa and Hydroida. The following is a list of all the 

 species observed which are not included in my former paper. 



Class POLYZOA. 



Suborder Cheilostomata. 



Family Cellariidje. 



Nellia, Busk. 

 Nellia oculata, Busk. 



A very large specimen of this species occurs, composed of 

 many clustering shoots, and attached to a seaweed by a dense 

 matted mass of delicate interlacing fibres. 



[Torres Strait ; Victoria ; Grulf of Florida ; coast of Arracan ; 

 Trincomalee ; off Bahia ; off Heard Island. 



Bath// metrical range. 10 to 550 fathoms *( 4 Challenger ' Report) .] 



LINN. JOURN. — ZOOLOGY, VOL. XXI, 11 



