388 
Dr. Leach’s Arrangement of the Crustacea, tf c. 
** Pedes coxis,femorihns, tibiis tarsisqueformd speciali hand distinctis. 
Ordo IV. M O N O M E R O S O M A T A. 
Corpus e segmento unico efFormatum. Os soepius rostriforme, in 
nonnulHs maxillis aut mandibulis instructum. Pedes octo aut 
sex. 
Subclassis II. N O T O S T O M A T A. 
Os dorsale ad dorsum affixum. {Pedes sex.) 
Subclassis I. C E P II A L 0 S T 0 M A T A. 
Ordo I. PoDOSOMATA. 
Obs. Fcemin® organa ovigera palpiformia, elongata, articulata, 
ad rostri basin prope inserta. Pedes coxis triarticulatis ; femo- 
ribus 1-articulatis ; tibiis biarticulatis ; tarsis biarticulatis, tin- 
gtiibus instructis. 
Fain. I. Pycnogonides. 
Mandihula nullcE. 
Gen. 1 . Pycnogonum auctorum. 
Pedes subrobusti. Coxce articulis subeequalibus ; tihice articulo 
primo longiore ; tarsi articulo primo minimo ; ungues simplices, 
validi, acuti. 
Organa ovigera 10-articulata, articulo ultimo acutissimo, 
unguiformi, ad rostri basin segmento corporis antico annexa. 
Spec. 1. Pycnogonum Balanarum, auctorum. 
Habitat in oceano Europaeo, et ad littora sub lapidibus. 
Gen. 2. Phoxichilus, Lair. 
Nymphon, Fabr.f 
Pycnogonum, 0th. Fabr. 
PhalaNGIUm, Montagu. 
Pedes 
