278 B- H. BuxTON, 



In this species the sheath is converted into a definite tubule 

 which ruus a little further inwards than is shown in the photograph ; 

 the final outlet being approximately in the position indicated by 

 {FO in brackets) but the tubule does not project beyond the 

 appendage as in 40 and 40a. It can be readily seen that (LR) 

 is directed towards the opening of the rostrum. 



Plate 33. 



Fig. 40 and 40a. Solpuga flavescens. Sagittal. 250 : 1. 



In 40 the exit tubule and nozzle are seen below, and above is 

 a part of the sheath (LR). 40a is taken from the same specimen 

 two sectioDS further on. The position of the nozzle is indicated 

 by (NZ) in brackets, above which a longitudinal section of the 

 sheath can be seen, at first running along the appendage, and 

 theu projectiug beyond it from the point where the appendage 

 turns outwards, i. e. to the left in the photographs. The 

 approximate position of the final outlet is indicated by (FO) in 

 brackets, and that of the side outlet by (SO) in brackets. 



Plate 34. 



4 



« 



Fig. 41. Paragaleodes barharus. Frontal. 100 : 1. 



Main part of the coxal gland. Above (anteriorly) is the 

 saccule {S) with its central lumen (CSL) passing into the 

 collecting tubule (CT), surrounded by pouches of the labyrinth 

 sac (SL). Below can be seen the abrupt change from the 

 labyrinth sac to the excretory tubule (CL) with its striated 

 cells. The course of the collecting tubule can be followed through 

 several sections to its entrance into the labyrinth sac, shown in 

 photo 37a, taken from the same specimen. ^ 



Fig. 41a. Paragaleodes harbarus. Frontal. 250 : 1. " 



A part of the same field as 41, more highly magnified, to show 

 the collecting tubule and its surroundings more in detail. 



{B in brackets) corresponds to the bulge on the other side. 

 See photo 42 (B). 



Plate 35. I 



Fig. 42. Paragaleodes barbariis. Frontal. 100:1. 



Similar view to that of 41 taken from the other side of the 

 same specimen. The collecting tubule is closed by a bulge {B) 

 from the labyrinth sac, which protrudes also into the lumen of 

 the saccule. Just below the bulge is the change from the laby- 

 rinth sac to the excretory tubule of the labyrinth. By comparing 

 42 with 41 it can be seen how very closely the parts correspond 

 on either side. 



