1902.] Annual Report. 33 



Journal, Part II. 



Althougli only two numbers of Part II of the Society's Journal 

 have appeared during the past year, and of these one belonged to the 

 year previous, yet several interesting papers have been published. 



Major L. Rogers, I.M.S., contributes a most valuable account of the 

 relationship of the water-supply, water-logging, and distribution of 

 Anopheles mosquitoes, respectively, to the prevalence of malaria north of 

 Calcutta. He concludes that a good water-supply is an important pro- 

 phylactic measure in the lessening of the prevalence of malaria, and that 

 the question whether the Anopheles mosquitoes play a part by taking the 

 malarial parasites back to the tanks from their human hosts or not must 

 be left to be determined by future experiments. 



Dr. P. 0. Roy has a paper dealing with two points in Chemistry, en- 

 titled, respectively. Further Researches on Mercurous Nitrite and its Deri- 

 vatives, and On Mercurous Iodide and a new Method of its Prepara.tion. 



There are three botanical papers : A description of a new Hima- 

 layan genus of Orohanchacese, by Mr. J. S. Gamble and Major Prain, 

 I.M.S., the eighteenth instalment of the latter gentleman's Novicise 

 Indicse, dealing with the Asiatic species of Balbergia ; and the twelfth 

 of Sir Greorge King's Materials for a Flora of the Malayan Peninsula. 

 For the purpose of studying the Asiatic Dalhergias Major Prain has 

 consulted specimens from no less than fifteen herbaria, besides that of 

 Calcutta, in the hope of publishing a monograph of the genus ; but this 

 proving impracticable under present circumstances, the seventy-four 

 known Asiatic species have been enrolled in a hand-list with bibliography 

 and record of distribution. In the case of the less familiar species the field 

 numbers of the specimens are quoted in order that the list may be of use 

 to workers in herbaria which Major Prain has been unable to visit, 

 should these coutain duplicates bearing these numbers. 



In Sir George King's paper will be found descriptions of all the 

 species of the Myrtle order to be found in a truly indigenous condition 

 in the Malay Peninsula, Straits Settlements, and Andaman and Nicobar 

 Islands. Although this order of plants is best represented in South 

 America - and Australia, the above mentioned portion of the Oriental 

 region yields no less than a hundred and twenty-two species, belonging 

 to eleven genera. The common Myrtle is the only European form. 

 The most important genus here dealt with is Eugenia, of which no less 

 than ninety-six species are described, more than half of these being new 

 to science. New species of the genera Barringtonia, Tristania, Pseudo- 

 Bugenia, and Planchonia are also dealt with in this valuable contribution 

 to Oriental botany. 



