DESCRIPTION OF PLATE B. 

 Fig. 4:.Sclerosoma quadridentatum Cuv. ; 4a, profile of cephalothorax 



and eye-eminence ; 46, genital plate. 



5. Sclerosoma Romanum L. Koch ; 5a, profile of cephalothorax 

 and eye-eminence ; 56, genital plate ; 5c, profile of spine in 

 front of caput, in another example. 



6. Leiobunum rotundum Latr., adult male; 6a, adult female 

 without legs, enlarged ; 66, profile of cephalothorax and eye- 

 eminence ; 6c, eye-eminence from in front ; 6d, genital plate. 



7. Leiobunum Blackwallii Meade, adult male ; 7, adult female 

 without legs; 76, eye-eminence from in front; 7c, genital 

 plate. 



S.Phalangium opilio Linn, adult male ; 8a, adult female without 

 legs or palpi; 86, profile of cephalothorax (male) and eye- 

 eminence ; 8c, ditto of female ; Sd, 8e, 8/, Sg, one of the falces 

 of each of four individuals (males) to shew different develop- 

 ments of the horn on the second joint ; 86, outline of front of 

 caput to shew the two characteristic denticulee; 8/, genital 

 plate (male) ; 8&, eye-eminence of female from above. 



9. Phalangium parietinum Degeer, adult male ; 9a, adult female 

 without legs or palpi, more enlarged ; 96, profile of caput and 

 eye-eminence (male) ; 9c, one of falces of male ; 9d, eye-eminence 

 (female) from above ; 9e, genital plate (female). 



