DEPARTMENT OF ZOOLOGY. 127 



Antarctic Crab, Lithodes antarcticus, presented by Mr. G. M. 

 Hall, and a set of the larval stages of the Common Lobster, 

 completing the exhibited series of its life-history. The number 

 of acquisitions being considerably less than in 1909, it was 

 possible to find space for them in the Crustacea Room by putting 

 up a second temporary cupboard, without greatly disturbing the 

 order of the collection. During the year a considerable part of 

 the dry collection has been re-pinned and the specimens cleaned 

 and repaired. 



Lt.-Col. A. Alcock, F.R.S., has been good enough to revise the 

 collection of Indian River-crabs, and the specimens have been 

 re-labelled and arranged according to his determinations. 



The working out of the collection of Cumacea belonging to 

 the Copenhagen Museum has been completed, and the collection 

 returned after selection of a very valuable series of duplicates, 

 chiefly co-types of new species. 



A Guide which refers partly to the Crustacea and 

 Pycnogonida is noticed under the preceding heading. 



ECHINODERMA.* 



Opportunity has been taken from time to time to re-spirit 

 parts of the collection. 



Most of the specimens obtained during the year have been 

 determined. 



The exhibited specimens of Beches-de-Mer have been 

 completely re-arranged and fresh descriptive labels have been 

 prepared. 



The dried study collection of Echinoderms is being entirely 

 re-arranged, and it is hoped that space sufficient for ten years' 

 additions will be obtained by this means. 



Worms. 



Dr. J. H. Ashworth has continued his preparation of the 

 Catalogue of Arenicolidse. 



The exhibited series of Gephyrea have had their names 

 brought up to date ; and a MS. Catalogue of the described 

 species and of the specimens in the collection has been prepared. 



A fine Nemertean worm {Linens corrugatus) has been 

 mounted and exhibited. 



The systematic re-arrangement of the collection of micro- 

 scopic slides has made some progress. 



* The Assistant in charge of this and other groups has the responsibility 

 of editing the " Discoveiy " Reports. Of this series, Yol. Y. appeared 

 during the year ; while Yol. YI., which is expected to complete the 

 publication, is in preparation, 



