GENERAL SYSTEMATIC BACTERIOLOGY 131 



Comment. The Zoological Code not only recommends that specific 

 types for genera and subgenera should be designated, but requires that 

 the names of families and orders should be derived from the names of 

 the type genera and type families respectively. This rule would be of 

 assistance in botany and in bacteriology. 



Recommendation. XIX. To avoid publishing or mentioning in their publica- 

 tions unpublished names which they do not accept, especially if the person respon- 

 sible for these names have not formallj^ authorized their publication (see Rec. 

 XIV, e). 



Recommendation. XX. When publishing new names in works written in a 

 modern language (floras, catalogues, etc.) to publish simultaneously the Latin 

 diagnoses and in paleobotany the figures which will make the names valid from 

 the point of view of scientific nomenclature. 



In view of the particular difficulties indicated in the identification of fossil 

 plants, in addition to the Latin diagnosis, there should be included a detailed 

 description in French, German or Italian. 



When new groups of the lower Cryptogames especially the fungi or other micro- 

 scopic plants are described, the description should be accompanied with a figure or 

 figures of these plants with the microscopic details which will aid in their 

 identification. 



The description of a parasitic plant should always be followed by a designation 

 of the host, particularly in the parasitic fungi. The hosts should be designated 

 by their scientific Latin names and not by vernacular names in a modern language 

 for these frequently have more than one meaning. 



Recommendation. XXI. To give the etymology of new generic names and also 

 of specific names when the meaning of the latter is not obvious. 



XXII. To indicate precisely the date of publication of their works and that of 

 the placing on sale or the distribution of named and numbered plants when these 

 are accompanied by printed diagnoses. In the case of a work appearing in parts, 

 the last published sheet of a volume should indicate the precise dates at which 

 the different fascicles or parts of the volume were published, as well as the number 

 of pages in each. 



XXIII. When works are published in periodicals to require the editor to indi- 

 cate on the separate copies the date (year and month) of publication and also the 

 title of the periodical from which the work is extracted. 



XXIV. Separate copies should always bear the pagination of the periodical 

 of which they form a part, if desired they may also bear a separate pagination. 



Section 5. On the 'precision to he given to names by the citation of the 

 author who first published them 



Article 40. For the indication of the name or names of a group to be accurate 

 and complete, and in order that the date may be readily verified, it is necessary 

 to quote the author who first published the name or combination of names in 

 question. 



Examples: Simarubaceae Lindley, Simaruba Aublet, Simaruba laevis Grise- 

 bach, Simaruba amara Aublet var. opaca Engler. 



