336 THE AMEBIC AN NATURALIST [VOL.XLII 



begun some years ago, upon the hybridization of fishes 

 belonging to widely separated genera and families. Such 

 cross-fertilized eggs did not commonly hatch, or even 

 develop far, but an interesting range of abnormalities was 

 produced. A few experiments in cross-fertilizing cer- 

 tain invertebrates were likewise undertaken. 



Raymond C. Osburn, Ph.D., instructor in zoology, 

 Barnard College, Columbia University, was occupied 

 chiefly in the preparation of a report upon the local 

 marine bryozoa, basing this work for the most part upon 

 collections made in the course of the biological survey 

 during the past five summers. On account of the great 

 abundance and almost universal distribution of many of 

 these animals locally, the need of such a monograph has 

 been much felt. Dr. Osburn has already found a con- 

 siderable number of species which are new to the region, 

 as well as discovering errors in the previous identifica- 

 tion of certain common local forms. 



Jacob Reighard, Ph.D., professor of zoology, Univer- 

 sity of Michigan, experimented upon certain features of 

 the behavior of Fund id us heten>clitus; likewise compiled 

 results obtained earlier in the summer at the Carnegie 

 station at Tortugas, where experiments had been per- 

 formed with the object of testing the alleged warning 

 coloration of various brilliantly tinted tropical fishes. 



Russell Richardson, graduate student in the University 

 of Pennsylvania (now assistant in the department of com- 

 parative physiology, Harvard University).— Response of 

 Limidus Muscle to the Electric Current. The two large 

 lateral tail muscles were generally used. Both constant 

 and interrupted (induced) currents were employed; and 

 the stimulus was applied either by wires or by non- 

 polarizable electrodes. Endeavor was made to find out 

 whether there was more than one form of curve to be 

 derived from induced shocks, as had been found by some 



