158 ACCOUNTS, ETC., OF THE BRITISH MUSEUM. 



POLYZOA. 



A number of specimens of Freshwater Polyzoa ( Plumatella, 

 Fredericella and Faludicella) of considerable economic 

 interest have been added to the collection, viz., from Water- 

 works at Torquay, Batley, near Market Drayton, and elsewhere 

 in this country, and from the Hamburg Waterworks. The 

 growth of the Polyzoa may seriously interfere with the 

 distribution of the water, and the Museum authorities have 

 been consulted as to the best remedies for curing and preventing 

 the mischief. 



Anthozoa. 

 The following deserve special notice : — 



A valuable -collection of 75 Alcyonaria collected by Prof. 

 J. Stanley Gardiner, F.R.S., in the Solomon Islands has been 

 presented by him, and 15 Alcyonarians from the Seychelles 

 have been obtained by exchange from the Cambridge University 

 Museum of Zoology. 



A fine specimen of Corallium secundum from the Sagami 

 Sea. 



An excellent example of Merulina ampliata ; 'presented by 

 Mrs. Rubin. 



Hydrozoa. 



Eight specimens of Limnocnida indica, Annandale, a 

 Medusa from fresh-water ponds in the Bomba}^ Presidency ; 

 received in exchange from the Indian Museum, Calcutta. 



PORIFERA. 



The more important additions were : — 



A complete set comprising 111 mounted microscopic pre- 

 parations made mostly from type-specimens of Sponges de- 

 scribed by Prof. G. C.J. Vosmaer in his Report on the Porifera 

 of the " Siboga " Expedition (Part II., The genus Spirastrella). 

 The donation was made by Prof. Vosmaer in acknowledgment 

 of the help given him by the staff of the Natural History 

 Museum during his stay in London. 



A collection of 97 specimens of Sponges, including many 

 types, from the Red Sea ; presented by the collector, Cyril 

 Crossland, Esq. 



A very fine specimen of Regadrella komeyamai Ijima, from 

 Sagami Bay, Japan. 



Protozoa. 



Five specimens of the Foraminifera Homotrema, Sporado- 

 trema and Polytrema, referred to in a memoir by the donor; 

 presented by Prof. S. J. Hickson, F.R.8. 



