106 ACCOUNTS, ETC., OF THE BRITISH MUSEUM. 



The botanical part, with an additional note by Mr. 

 \\'oodward, was reprinted as — 



"■ The dates of Publication of Lamarck's ' Encyclopedie 

 Methodique ' (Botany)." (Journ. Bot., 1906, pp. 318-20.) 



[Dates of Publication of the] " Atlas der Diatomaceen- 

 Kunde. Herausgegeben von A. Schmidt." (Journ. Bot., 

 1906, pp. 384-86.) 



The number of visits paid to the Library during the year 

 by students and others (irrespective of the Staff) was 1,357. 



Index Museum and Morphological Collections. 



During the past year a series of Crabs has been put on 

 exhibition in th.e Entrance Hall, showing the extent to which 

 the external appearance, particularly that of the secondary 

 sexual organs, may become altered in consequence of the 

 Crab being attacked by the parasite Sacculina. The series 

 of specimens illustrating the general characters of Birds' 

 Eggs, the range in shape, colour, texture, and thickness of 

 shell, and number in the clutch, has been removed from the 

 wall-case in Bay 3 of the Hall to a more prominent and 

 better lit position on the sides of the arch of Bay 5. The 

 wall-case from which the series was removed has been fitted 

 with a new back, obliquely placed so as to receive as much 

 light as possible from the skylight of the Hall. In this case 

 is now displayed the specimens of Birds' wings and tails 

 which are too large to exhibit in the table-case. 



The series of Peas illustrating the Mendelian hypothesis 

 of heredity has been placed in one of the new obliquely set 

 cases in Bay 8, where it is brought more to the notice of the 

 public and is better lit than in the table-case of Bay 6, where 

 it was previously exhibited. 



During the summer, shortly after the eruption of Vesuvius, 

 there was placed temporarily in the Entrance Hall a series of 

 specimens of lava and scoriae thrown up by Vesuvius during 

 the last and during the previous eruption, and also photo- 

 graphs and charts showing the change in the form of the 

 volcano brought about by the eruption. 



Two models have been added to the Malaria Case in the 

 Hall — one of the proboscis of the Mosquito before piercing the 

 skin, and another of the proboscis in the act of piercing. 



Occupying a central position in the Hall — a position 

 previously taken by the Tsetse Case, which has now been put 

 in Bay 6 — is a table-case in which are shown three series of 

 Plaice illustrating the different sizes attained by the fish in 

 different parts of the North Sea and English Channel in the 

 same periods of time, the ages of the fish being determined 

 by the number of rings on the otoliths, a series of which is 

 also exhibited. Also a series of Pollack showing the rate of 



