February 12, 1904.] 



SCIENCE. 



251 



but very few speeimeus were fouud, and 

 none at all of unusual interest. Experi- 

 ments were carried on in order to find un- 

 der what artificial conditions it was pos- 

 sible to rear larvas of various medusEe, and 

 to keep the adults in good state for obser- 

 vation. Observations were also made upon 

 the degeneration of tentacles in Gonionema. 



Amos A¥. Peters, Ph.D., instructor in 

 physiology,. University of Illinois : ' Studies 

 on the Phosphorescence of Ctenophores. ' 

 Efforts were directed toward the following 

 ends : ( 1 ) To follow the phenomenon back 

 through the ontogeny of the animal; (2) 

 to the detennination of the influence of 

 light upon the deposition of eggs; (3) to 

 the relations between phosphorescence and 

 various stimuli. 



W. 0. Richtman, expert in pharma- 

 cognosy, U. S. Department of Agriculture : 

 Assisted Dr. True in his experiments upon 

 artificial sea waters. 



Gr. F. Ruediger, M.D., Memorial Insti- 

 tute for Infectious Diseases, Chicago (Rush 

 Medical College) : 'Bactericidal Properties 

 of Sera of Marine Animals.' The object 

 of this work was to find a normal blood 

 sex'um, in cold-blooded animals, which 

 would be destructive to streptococci. Sera 

 from butter-fish, dog-fish, conger-eel, 

 flounder, mackerel, dusky shark, sand- 

 shark, scup, squeteag'ue, butterfly-ray, 

 sting-ray, common skate, squid, lobster, 

 spider-crab, king-crab, • Snapping-turtle, 

 painted turtle and spotted turtle were 

 used. Streptococci were found to grow 

 well in all of these sera, excepting those 

 of the painted turtle and spotted turtle. 

 These two sera seemed to kill off large 

 numbers of organisms from some cultures 

 of streptococci, other cultures, however, 

 not being affected. Heating the serum 

 destroyed its bactericidal properties. An 

 attempt was also made to immunize dog- 



fish, but lack of time prevented conclusive 

 results. 



Geo. G. Scott, "m.A., tutor in the CoUege 

 of the City of New York ; assistant in charge 

 of supply-room, at the laboratory : ' Studies 

 of the Gregarines.' Numbers of inverte- 

 brates were examined for gregarines. 

 None were found in the blue-crab, lady- 

 crab, spider-crab, king-crab, squid nor 

 Fhascolosoma. In the lobster, specimens 

 of the gregarine, Porospora gigantea were 

 found, almost every lobster having cysts 

 of this parasite in the folds of the rectum. 

 Gregarines were also found in Cirratulus, 

 Nereis and Clymenella. In Cynthia, the 

 movements of a gregarine were observed 

 carefully and camera di'awings were ob- 

 tained, representing the changes of shape. 

 Several specimens of Amphitrite showed 

 pathological enlargements beneath the 

 ectoderm of the body wall. These are as 

 yet undetermined. 



John A. Shott, A.M., professor of biology 

 and physics, Westminster College : ' Photo- 

 taxis in Copepoda' (in cooperation with 

 Dr. Parker). The problem was to deter- 

 mine the reactions of the copepods in a 

 graded field of light when they were started 

 toward the source of light. The work was 

 done during the last two weeks of July, at 

 which time the copepods were difficult to 

 obtain, so that the results were not con- 

 clusive. 



Grant Smith, graduate student, Harvard 

 University : Assisted Dr. True in experi- 

 ments upon artificial sea water, also carried 

 on experiments upon phototactic responses 

 of star-fish. 



Francis Bertody Sumner, Ph.D., in- 

 structor in zoology, College of the City of 

 New York; director of laboratory: (1) 

 'Card Catalogue of Local Fauna and 

 Flora,' commenced, vyith cooperation of 

 Mr. R. C. Osburn (see above) ; (2) 'Dredg- 



