DEPARTMENT OF ZOOLOGY. 73 



4. A parasitic Mite (Chorioptes ovis) affecting the feet of 

 English Sheep. 



5. A Mite (^Tyroglyphus longior, var.) destroying stored corn in 

 Colombia. 



6. Tyroglyphid Mites damaging stored oats in Flanders ; 

 information given to the Military authorities. 



7. Several enquiries referring to the Furniture Mite (^Glycy- 

 phagus domesticus), infesting houses. 



VI. Crustacea. 



At the request of the London Chamber of Commence, an investi- 

 gation was made of certain brands of tinned " Lobster," and it was 

 demonstrated to the satisfaction of representatives of the firms 

 engaged in the trade that .the contents of the tins were the leg- 

 muscles of a Japanese crab, Paralitliodes camtschatica. 



Boring Crustacea (Limnoria and Chelura) have been determined 

 as causing damage to submarine telegraph-cables in the Mediter- 

 ranean, and measures have been suggested for preventing their 

 attacks. 



Young crabs (Ccdlinectes, sp.) found preying on mosquito larvae 

 in West Africa have been determined for the Imperial Bureau of 

 Entomology. 



Information has been given to the manufacturers of anti-fouling 

 composition regarding the fouling of ships by barnacles, and to 

 other visitors and correspondents with reference to damage done by 

 Woodlice. 



VII. Porifera. 



The question of the cultivation of commercial Sponges in the 

 West Indies has been reported on for the Colonial QjEfice. 



VIII. Miscellaneous Questions. 



Injuries to Submarine Telegraph cables due to various animals, 

 such as Fishes, Crustacea and Polychsete Worms, have been 

 examined and reported on. 



A series of specimens illustrating the " Biology of Waterworks " 

 has been assembled and will shortly be exhibited in the Central 

 Hall ; and an illustrated Guide to the series is in course of 

 preparation. 



VII. — Students and Visitors. 



The number of visits paid to the Zoological Department during 

 the year 1916 by students and other persons requiring assistance 

 or information amounted to 7,018. 



This number includes the visits paid by Students holding tickets 

 entitling them to do special work in the Exhibition Galleries. 



