DEPARTMENT OF ZOOLOGY. 101 



Mr. G. K. Gude. lias continued his rearrangement of the 

 exhibited series of Helicidae. Work on the collections has been 

 greatly facilitated bj extra assistance, which has been partly 

 voluntary, given by Mr. J. E. le B. Tomlin and Lieut. -Col. A. J. 

 Peile. These gentlemen are responsible for the following work : 

 Systematic rearrangement and cataloguing of the Marginellidae 

 and Mactridae and of the Gwatkin collection of radulae, study 

 and determination of collections from Antigua, Bermuda, the 

 Mediterranean and other localities. 



The arrangement and preparation of the Blanford and 

 Godwin-Austen Collection of Oriental Land Mollusca have been 

 continued by Lieut. -Col. H. H. Godwin- Austen, F.R.S. 



General collections from Peru, Zanzibar, Florida, Syria, and 

 from a Neolithic shell-mound in Trinidad (W.I.) have been 

 determined and reported upon. 



A beginning has been made of a card-index of Mollusca, with 

 references to bionomic, distributional and other data. 



A card-index of all accessions has been started, and the simi- 

 lar index of microscopic preparations made in 1919 has been re- 

 arranged upon a new plan. 



In the Spirit Building the work of replenishing the jars and 

 bottles has been continued, and concurrently with this a generic 

 catalogue of spirit material is in course of preparation. 



Myriopoda and Arachnid a. 



A number of large drawings of Mites and Ticks injurious to 

 man and domestic animals have been mounted and are now 

 exhibited on thq wall in the Insect Gallery. 



Considerable progress has been made with a manuscript list 

 of the species of Myriopoda and Arachnida in the Collection. 



Crustacea and Pycnogontda. 

 Some accessions of more than usual interest have been dealt 

 with, notably a small collection comprising several new or little- 

 known species from the South Orkney Islands, All the spirit 

 preparations exhibited in the Gallery have been inspected and 

 a considerable number refilled or remounted. In the spirit 

 collection bottles urgently requiring refilling have been attended 

 to. The registration of the Norman collection, which has been 

 in progress since 1911, has at length been completed, a total 

 number of 53,611 specimens having been registered. A larger 

 number of specialists than usual have consulted the collections 

 during the year, and the Museum has profited by their deter- 

 mination of unnamed or wrongly-named specimens. 



ECHINODERMA. 



All accessions! have been registered and incorporated. 

 Fourteen specimens of Holothurians exhibited in the Star- 

 fish Gallery have been remounted. 



Worms. 



Accessions have been, as far as possible, determined and regis- 

 tered. Special attention has been given to the revision of certain 



