THE FAMILY OF THE DESMACIDINAE. 403 



ac^ (ac. ac.) r=: acerate (= „spitz-spitz" — „umspitz.") 

 ac'f = fusiformi-acerate (= „Spindel.") 

 tr°. ac. = spinulated = pin-shaped (=: Steckuadel.") 

 tr°*. = biclavated cylindrical. 



tr. ac. sp. =: spined spiculum (^ „Knotennadel.") 

 /\ = tricurvate acerate = bow (==: „Bogen.") 

 Ol =z simple , reversed or contort bihamate , exter-and 

 interumbonate , abbreviated bihamate S-shaped 

 etc. It seems to me more practical to unite all 

 these, as they are only modifications of one type 

 {z= „Spangen" = sigmoid spicula"). 

 4^ = trenchant bihamate. 

 anc". 2 (anc^. 3) == bidentate (tridentate) equianchorate 



(=: „zwei, dreizahnige Doppelanker.") 

 rut^, = dentato-palmate equianchorate , palmated equi- 

 anchorate etc. (= „Doppelschaufel") ^). 

 rut. rut. = id. inequianchorate etc. (=: „Pantoflel.") 

 It is not here the place further to insist upon the prac- 

 tical advantages of this system of formulas ; but I intend 

 to do so soon , and to work it out more completety. 



We can now pass to the enumeration and description 

 of the species , which have at present been introduced into 

 literature , as far as I have been able to find. The spe- 

 cies , of Avhich there are specimens in the Leyden Museum 

 will be marked with *. The following list is but a pro- 

 visional one ; as soon as possible I hope to publish a more 

 extensive memoir on this subject, with the indispensable 

 illustrations of the new species. I must also refer to this 

 paper , which is yet in preparation , for further explanation 

 of the reasons which have led me to identify several species. 



1' Rntrnm trowel. 



JSotoJa Ivoiii (lie Lii-ydon Miifaeitm , "\^ol. H. 



