ZOOLOGY — CRAMPTON, DUERDEN, HOWARD. 245 



With the emergence of the pupae now on hand during the earl}^ summer 

 of 1907 the acquisition of statistics in connection with the present research 

 will be regarded as concluded. Ten thousand and more pedigreed individuals 

 produced since 1903 will afford ample material for the statistical treatment 

 of the problems of variation, selection, correlation, and inheritance. The 

 data will gain an additional value because of the opportunit}^ for comparison 

 with figures obtained during the years 1899-1903, relating to many thousands 

 of ' ' wild ' ' individuals. 



Daerden, James E», Rhodes University College, Grahamstown, So. Africa. 

 Grant No. 288. ContiiniatioJi of investigaiio7is oji the morphology a?id 

 development of recent ajid fossil corals and physiology of the Zoantharia. 

 (For previous reports see Year Book No. 2, p. xli ; Year Book No. 3, 

 p. 137, and Year Book No. 4, p. 277.) $75o. 



Abstract of Report. — (a) Morphology and development of recent corals. — 

 Work has been continued upon the Pacific corals collected in the Hawaiian 

 Islands during 1904, and the seventh of the series of papers dealing with the 

 morphology of the Madreporia has been published. The contribution " In- 

 trapolypal tentacles ' ' describes a peculiar modification undergone by certain 

 of the tentacles in species of Pocillopora. Studies on variation by statistical 

 methods have been continued and are yielding results of much interest. 



{b) Fossil corals. — During the year an attempt has been made elsewhere 

 to controvert the hexamerism of the Rugose corals, a condition claimed by 

 the author as a result of previous investigations. From further studies upon 

 fossil specimens it has been possible to demonstrate a primary hexameral 

 condition for several additional species of Rugose corals, so that no doubt 

 can now be entertained as to the correctness of the original conclusions. 

 Two papers, containing further evidence upon the subject of the primary 

 septa of fossil corals, are now in press. 



(f) Physiology of the Zoantharia. — A paper, ' ' The role of mucus in corals, ' ' 

 has been published and contains an account of the important part which 

 mucus plays in the feeding of living polyps. Another contribution, "On 

 the habits and reactions of crabs bearing Actinians in their claws," has also 

 been published and discusses the various relationships involved in this pecu- 

 liar form of commensalism. 



Howard, L. Ot U. S. Department of Agriculture, Washington, D. C. Grant 

 No. 250. Preparatio)i of an elaborate monog7-a,ph on American mosquitoes. 

 (For previous reports see Year Book No. 2, p. xlii ; Year Book No. 3, 

 p. 138, and Year Book No. 5, p. 279.) $3,000. 



Abstract of Report. — Dr. Dyar has made some collections in southern Cali- 

 fornia, and has done some breeding in that part of the country, and addi- 

 tional material has been coming in from Trinidad, British West Indies, and 

 from Florida. Additional observations have been made by volunteer assist- 



