ZOOLOGY — CRAMPTON, GUDGER, MARK. 24I 



Crampton, H. E., Columbia University and American Museum of Natural 

 History, New York, N. Y. Grant No. 563. Study of variation, muta- 

 tion, heredity, and geographical distribution of Polynesian species of 

 Partida. (For previous reports see Year Books Nos. 6, 7, and 8.) $2,500 



During eight months of 1909 a fourth journey was made to the South 

 Pacific Islands in order to complete a survey of certain important regions of 

 several of the Society Islands and to confirm certain observations of previous 

 years. The field-work in this group has been entirely completed and the 

 final laboratory investigations are rapidly reaching conclusion. On the way 

 to New Zealand four islands of the Cook group were visited, and although 

 this group contains few Partida, some interesting material was obtained for 

 comparison with the species of the Society and other islands. Later, by way 

 of the Tonga Islands, Samoa was visited and a final complete exploration of 

 Tutuila was made. A survey of Upolu and Savii was made impossible by 

 the adverse meteorological and other conditions, but certain valuable collec- 

 tions were made. At the Hawaiian Islands field-studies were prosecuted in 

 order to observe the biological conditions under which the Achatinellidae 

 exists. In addition a study was made of the important collections of Partida 

 made by Garrett, which are deposited in the Bishop Museum at Honolulu. 



During the past summer the important collections of Partulse in the Mu- 

 seums of Europe have been studied for the purpose of verifying the identi- 

 fications of conchologists, and also for the study of type-specimens of signifi- 

 cant species. 



^ Gudger, E. W., North Carolina State Normal and Industrial College, 

 Greensboro, North Carolina. Grant No. 529. Investigation of the 

 breeding-habits and life-history of the gaff-topsail catfish. (For pre- 

 vious report see Year Book No. 7.) $300 



Work under this grant has been continued, but final results have not been 

 reached. 



V Mark, E. L., Harvard University, Cambridge, Massachusetts. 



Grant No. 564. Study of the maturation and early stages in the develop- 

 ment of the ova of mice and rats. (For previous reports see Year Books 

 Nos. 5-8.) $100 



Grant No. 4Q2 (made jointly with W. E. Castle). Continuation of experi- 

 mental studies in heredity. (For previous reports see Year Books Nos. 

 3-8, inclusive.) $500 



Grant No. §64. — The paper by Dr. J. A. Long and Professor Mark on 

 "The maturation of the egg of the mouse" is now in press. An abstract of 

 that part of the results relating to the chromosomes was presented at the 

 Eighth International Zoological Congress (which met at Graz, Austria, in 

 August) under the title "Die Reifung des Eies der Maus." 



16 — YB 



