printed in two columns, which gives an important saving of space without a 

 loss of clearness. 



We have moreover changed the chapter „list of subjects with names of 

 investigators" by omitting the text of the subjects; thus reducing this chapter 

 to a list of indices only. This text has been printed in two columns. We hope 

 that this form will still fulfil all requirements of clearness and suitability. 



We have tried to classify the subjects in small units in order to simplify 

 the consultation of this rubric. The various co-workers belonging to a team 

 have been listed in alphabetical order. 



Your attention is again asked for the chapter ..short notes and references 

 to new technical methods", which we shall have to omit in future in case of 

 lack of sufficient interest (Cf. the introduction in the first issue). 



We wish to draw your attention to the opening of the new chapter, in 

 which recently appeared text-books will be reviewed 

 (cf. the text of chapter h). and to the new suggestion of giving an annual 

 survey of the embryological literature published in the 

 preceding year (cf. the text of chapter f). 



The number of subscriptions taken by institutes and individual workers 

 has markedly passed the minimum number necessary for a safe financial base. 

 We can therefore announce with great pleasure that we are able to reduce 

 the annual subscription to 22,75 florins (dutch currency) which at the present 

 moment corresponds to $ 6. — . 



We are trying to develop a system as simple as possible for the collecting 

 of the data for the G.E.I. S., which, on the one hand, will considerably ease 

 the collaborator's work, and, on the other, will restrict the administrative 

 work at the Hubrecht Laboratory to a great extent. Next year we will try 

 to complete the collecting of data in the period from April to 

 July, hence before the beginning of the vacations, so 

 that we can prepare the new edition directly after the summer holidays. As 

 we will in future use the same system of classification as developed in the 

 second issue, we shall send you only the text of the second edition and a 

 form for n e w subjects in order to reduce the number of forms and circulars. 

 We would like to emphasize the request to return proofs and forms a t 

 your earliest convenience, thus saving us a great deal of work 

 and time and sparing yourself the unpleasantness of being reminded again. 



P. D. NIEUWKOOP. 



