1132 



London, and are entitled to claim, in return, such British or Foreign 

 species as the Society's store of duplicates may afford. A preference in 

 the supply of their desiderata is given to those contributors who most 

 exactly conform to the subjoined Regulations. 



" The Annual Subscription entitles any member to claim fifty spe- 

 cies, without the obligation of contributing specimens to the store ; 

 priority still being given to the claims of actual contributors iu select- 

 ing desiderata. 



" Desiderata of Members. — These can be applied for by prefixing 

 short horizontal marks ( — ) to the names of the desiderated species or 

 varieties in a copy of the ' London Catalogue of British Plants,' pub- 

 lished for this purpose by the Society. If a manuscript list be sent 

 instead, it must correspond exactly with the printed Catalogue, latest 

 edition, in the names and prefixed numbers or letters, and also in 

 their order of sequence. 



" Desiderata of the Society. — Lists of desiderata will be sent to the 

 contributing members annually. To prevent the accumulation of use- 

 less specimens, and to avoid the needless destruction of rare plants, 

 contributors are requested to send only the species asked for by the 

 Society. An exception to this rule may properly be made in the case 

 of newly discovered species not yet entered in the Catalogue, or of any 

 remarkable varieties not included therein. 



" Time of sending Parcels. — This is optional with the contributor; 

 a return parcel being made up as soon as practicable after the receipt 

 of one from him. But the best return can be made for parcels 

 received near the end of the year; andjt is also most convenient to 

 the Society that parcels should arrive in December ;— least conve- 

 nient, between December and April. 



" Number of Specimens. — In a parcel of British plants, it is gene- 

 rally more convenient to the Society that there should be only few 

 species (say, one to ten species) and many duplicates (say, ten to a 

 hundred specimens, according to rarity), of each species. 



" Character of Specimens. — The specimens should be such as to 

 show clearly the distinctive characters of the species, and be other- 

 wise as perfect examples of it as possible. Small plants should be 

 sent entire, roots included. Long plants should be bent or folded 

 before drying. No fragments ought to be sent, unless those of trees or 

 other large and branching plants which cannot be folded within suit- 

 able dimensions if entire. Unsuitable specimens are destroyed, and 

 unprofitably waste the time of the distributors in separating and 

 removing them. 



