256 B. H. Buxton, 



labyrinth coils {CL), but in CL the nuclei are raised from the 

 base of the cells, and lie upon a striated border, the striation how- 

 ever being less conspicuous than is usual. A g-eneral view of this 

 specimen with the coxal glands and their relation to other parts of 

 the cephalothorax is shown in diagram C. 



As to the labyrinth, the description given of it applies to the 

 Galeodids, in which the coils and twists are few and the tubules 

 can be followed up without difficulty throughout their course, but 

 the Solpugids, althougii fundamentally the arrangement is tlie same 

 as in the Galeodids, have a much more complicated labyrinth, but 

 it will be sufficient to refer to the diagram D, which shows how 

 the labyrinth sac has developed a second extension posteriorly, 

 dragging with it the point of change to the striated tubule, so that 

 the change in this case is far removed from the main part of the 

 gland. The striated tubules also become so greatly coiled in the 

 Solpugids that it is impossible to follow them accurately throughout 

 their whole length (photo 43). 



There is much more coiling and twisting than is indicated in 

 the diagram of the Solpugids but that of the Galeodids shows 

 approximately all the coiling. In neither case however has any 

 attempt been made to show in the diagram D the pouching of the 

 labyrinth sac, a better idea of which can be obtained from the 

 photographs (37 and 37 a). 



The pouching of the labyi-inth sac is most conspicuous in Fara- 

 galeodes. In the Solpugids and Galeodes the pouches are fewer but 

 individually longer. 



The chitinous groove or sheath along which the stream from the 

 nozzle is directed towards the rostrum varies somewhat in appearance 

 in the diiferent genera. In Paragaleodes it is short and imperfect, but 

 in Solpuga much better developed, forming a long forwardly pro- 

 jecting sheath standing out from the coxa of the appendage (photos 

 40, 40 a). Finally in OiJwes (?) it is converted into a definite tubule 

 lined with epithelium which, starting from the nozzle, runs inwards 

 with a outlet just before reaching the rostrum (photo 39, LR and 

 diagram C). There is however a side outlet just beyond the nozzle, • 

 the object of which would appear to be to allow excretory products 

 to dribble out during a period of quiescence, and probably this side 

 outlet is closed and the fluid forcibly ejected through the tubule 

 beyond it for salivary purposes. 



The side outlet is present also in other genera and in the photo- 



