478 



SCIENCE 



[N. a. Vol. XXXIX. No. 1004 



Hermaphroditism in the Brook Lamprey: Peter 

 Okkelberg. (Introduced by E. W. Hegner.) 

 In a study of the reproductive organs of the 

 American brook lamprey, EntospJienus wilderi, it 

 was found that a juvenile hermaphroditic condi- 

 tion occurs normally and that there were three 

 kinds of individuals as regards sex, namely, true 

 females, true males and hermaphrodites. 



The sex glands of fifty larvae, ranging from 7J 

 cm. to 20 cm. were studied and it was found that 

 46 per cent, were true females, 10 per cent, were 

 true males and 44 per cent, hermaphrodites. In 

 the adult condition males and females occur in 

 practically equal numbers and the conclusion is 

 reached that all the hermaphrodites develop into 

 males. Out of 15 male specimens examined seven 

 were found which contained undeveloped ova, 

 — some a few and others a great number. These 

 ova were similar in structure and size to those 

 found in the larvse. 



The number of ova found in the mixed gland 

 varied greatly. Sometimes only a single ovum 

 was found and in other cases a large number of 

 ova were present. 



The hermaphroditic condition in the lamprey 

 seems to be similar to that found in several of 

 the other lower vertebrates such as Myxine, some 

 Teleosts, and in some Amphibians. 



exhibits 

 During the meetings the following exhibits were 

 made by members of the society in one of the 

 rooms of the Zoological Laboratory of the Uni- 

 versity of Pennsylvania. 



E. P. Phillips and George 8. Muth (Bureau of 

 Entomology) — Instruments (Thermo-electric Out- 

 fit) (Special Scale), used in work on Behavior of 

 the Honey Bee. 

 S. O. Mast (Johns Hopkins University) — Photo- 

 graphs and Autochromes showing changes in 

 color and pattern in flounders. 

 Eobert K. Nabouks (Kansas State Agricultural 

 College)^— Specimens and charts illustrating ' ' In- 

 heritance in Orthoptera. " 

 M. F. GUTEK (University of Wisconsin) — Demon- 

 stration of the X-element of Plymouth Eock 

 Fowls. 

 J. E. Ackeet (Kansas Agricultural College) — 

 Demonstration of the Innervation of the Integu- 

 ment of Chiroptera. 

 H. D. Eeed (Cornell University) — Model of the 

 Pectoral and Axillary Glands in Schilbeodes 

 gyrinus. Caswell Grave, 



Secretary 



THE ASSOCIATION OF AMERICAN 

 GEOGEAPHEES 



The tenth annual meeting of the Association of 

 American Geographers was held at Princeton, 

 .January 1 and 2, 1914. About thirty-five mem- 

 bers were present and the attendance of members 

 and non-members ranged from twenty-five to 

 .sixty. Thirty-six titles appeared on the final pro- 

 gram and twenty-eight papers were read. 



The officers for 1914 are as follows: 



President — ^Albert Perry Brigham. 



First Vice-president — Charles E. Dryer. 



Second Vice-president — 0. F. Marbut. 



Secretary — Isaiah Bowman. 



Treasurer — Francois E. Matthes. 



Councilors — Lawrence Martin, Eobert DeC. 

 Ward, Alfred H. Brooks. 



Editor — Eichard E. Dodge. 



The nominating committee for officers for 1915 

 consists of C. F. Marbut, chairman, E. H. WMt- 

 beck, H. H. Barrows. 



One of the most important features of the meet- 

 ing was the adoption by the Association of the plan 

 of cooperation proposed by the American Geo- 

 graphical Society. The plan provides for (1) a 

 joint research committee of the two organizations 

 to administer a joint research fund, (2) a joint 

 meeting in New York each spring, (3) the publi- 

 cation by the Association in collaboration with the 

 American Geographical Society of the Annals of 

 the Association, (4) an interchange of the publi- 

 cations of the two societies. 



The research committee of the Association con- 

 sists of: Alfred H. Brooks, chairman, Herbert E. 

 Gregory, Eobert DeC. Ward. 



An increasingly large proportion of the papers 

 read dealt with various phases of human geog- 

 raphy. The first meetings of the Association 

 (1904-1906) were naturally marked by a large 

 number of physiographic papers. Then came a 

 period (1907-1910) when physiography and authro- 

 pogeography were alternately ahead. In the last 

 three programs anthropogeography has led, owing 

 chiefly to the growing number of students devoted 

 to the life side of the science. Future programs 

 will probably show a still stronger tendency in 

 this direction, judging by the livelier discussions 

 evoked by the more strictly geographic papers. 



The joint meeting in New York will be held 

 April 3-4. The next annual meeting will be held 

 at some point west of Pittsburgh. 



Isaiah Bowman, 



Secretary 



