362 NATURAL SCIENCE. December. 



sanction has been given upon definite conditions to which we must 

 direct the attention of those desiring a speciahst's assistance. Every 

 specimen sent to a speciaHst must be labelled with definite locality and 

 horizon. The sender must give satisfactory assurance that he desires 

 the information for purposes of publication, and not merely for the 

 sake of having his collection named. Full acknowledgment of the 

 assistance rendered by the specialist must be published. The 

 specialist reserves the right of himself publishing, in any way that 

 seems to him best, any new species or other points of biological 

 interest afforded by the material submitted to him. It is also impor- 

 tant to notice that many of these specialists are connected with public 

 institutions or have their time otherwise largely occupied ; in some 

 cases they will justly demand to receive some further benefit, as by 

 the presentation of selected specimens to their institution. In no case 

 can Natural Science be responsible for the sending of collections, for 

 the determination of specimens, or for the publication of results ; but 

 the sender and the specialist between them must make their own 

 arrangements and their own bargain. 



We may also point out that this list does not profess to be a 

 complete list of British palaeontologists. Some we may have over- 

 looked and omitted to ask ; some whom we have asked have not yet 

 replied ; others have refused their assistance ; while others, though 

 they profess a readiness to help all bond fide workers (which is more 

 than we asked them to do), are not so ready to inform the workers of 

 their good intentions. However, we hope at no distant date to publish 

 a supplement to this list, and we hope also that our list will be copied, 

 with or without additions, by any of our contemporaries that share our 

 desire of helping scientific workers. 



