132 ACCOUNTS, ETC., OF THE BRITISH MUSEUM. 



Polyzoa. — The more noteworthy additions are — 



Six beautifully preserved specimens of fresh water Polyzoa, 

 with tentacles expanded ; presented by C. F. Rousselet, Esq. 



Fourteen types and co-types of Fresh-water Polyzoa 

 from Lake Tanganyika, collected by Dr. W. A. Cunnington '^ 

 presented by the Tanganyika Exploration Committee. 



Anthozoa. — Attention should be called to the collection of 

 thirty-eight specimens made and presented by Prof. Herdman, 

 F.R.S., in Ceylon and described by Prof. J. A. Thomson and 

 Dr. Henderson ; and to sixteen specimens of Goniopora described 

 in vol. iv. of the catalogue of Corals and presented by the 

 University Museum of Zoology, Cambridge. 



Hydrozoa. — A set of five bottles of Hydrozoa from Birkel el 

 Qurun, described by C. L. Boulenger ; presented by the Egyptian 

 Survey Department. This little collection includes the recently 

 described Fresh-water Medusa Moerisia lyonsi, C. L. Boulenger,. 

 and its Hydroid phase. 



Porifera. — Among the interesting and important additions 

 during the year may be mentioned the following : — 



A collection comprising two hundred and twenty-four pieces 

 of specimens (mostly types) received in exchange from the 

 Berlin Museum, and including "Valdivia" Hexactinellida, 

 described by Prof. F. E. Schulze, Sponges from the Red Sea,. 

 described by Keller, and Sponges from the Pacific and from the- 

 southern end of S. America and from Chile, described by 

 Dr. J. Thiele. 



A set of two hundred and thirty-one preparations of 

 Tetraxonid Sponges of the deep sea German Expeditions. 

 " Valdivia " and " Gazelle " ; purchased. 



A set of sixty-one preparations, mostly from type specimens, 

 of Pacific Geodidae ; purchased. 



A valuable set of twenty-four preparations of species and" 

 varieties of American Spongillidae ; presented by Dr. Edward 

 Potts.. 



VI. — Economic Zoology, 



As in former years, the work done in connection with this 

 section has had reference to Insects. The question of the 

 spread of disease by insect agency has brought to the Museum 

 numerous collections of biting insects from various parts of the 

 world. The specimens sent have been named for the donors 

 as far as was practicable, and the various questions asked 

 respecting them have been replied to. 



Besides these, numerous other insects which were injurious 

 or which caused annoyance have been sent to be named and 

 for advice as to preventive measures. 



