ii6 



SMITHSONIAN MISCELLANEOUS COLLECTIONS 



-a Lm b 



-b 



VOL. 97 

 -Chi 



Fig. 49. — Embryonic and adult structures of Arachnida. 



A, embryo of Agelena labyrinthica (from Balfour, 1880). B, embryo of 

 PholchS opilionides Schranck with two lateral lobes (a, b) on acron (from 

 Pokrowsky, 1899). C, embryo of Trochosa singoriensis Laxm., with possible 

 antennal rudiments (from Jaworowski, 1891). D, longitudinal section through 

 anterior end of prosoma of a phalangid (Liobiiuiiiu) , showing anterior tergal 

 attachments of cheliceral muscles. E,, dorsal surface of phalangid (Liobunum) , 

 legs removed from coxopodites. F, epistomal lobe and labrum of a solpugid, 

 lateral view, showing movable appendage {Ant?) at side of epistoma. G, same, 

 longitudinal section, showing muscles of epistomal appendage. 



a, possible preantennal rudiment of embryo; Acr, acron (cephalic lobe of 

 embryo) ; Ant?, adoral (possibly antennal) appendage of adult solpugid; b, 

 possible antennal rudiment of embryo ; Ap, apodeme ; Chi, chelicera ; Chlmcls, 

 cheliceral muscles ; dO, dorsal ocellus ; E, lateral eye ; Epst, epistoma ; GC, 

 genital chamber; Gtr, gonotreme; IIBnd, IIIBnd, basendites of second and 

 third appendages; IXS, sternum of ninth somite; iL, first leg; Lm, labrum; 

 nicl. muscles; Mth, mouth; Pdp, pedipalp ; Stom, stomodaeum ; I-XV, postoral 

 somites. 



