PLATE XXV. 



Class THACH.'E AT A continued. 



ARACHNIDA. 

 THE SCORPION (Scorpio). 



JIG. 1. VENTRAL VIEW, x 1 



c. chelicerse: p., p. pedipalpi: /.M. 4 walking legs (These six pairs of 

 appendages belong to the segments of the cephalo-thorax) : 

 g. genital operculum covering the genital opening, on the first 

 segment of the prse abdomen : p. pectine, on the second 

 segment of the prae-abdomen : s. 2 -s. 4 stigmata on the fourth to 

 the sixth segments of the prse- abdomen (The stigmata on the 

 third segment are concealed by the pectines) : p. 7 seventh 

 segment of the pros-abdomen: p.a.^-p.a. 1 the six segments 

 of the post-abdomen : sp. poison spine. 



FIG. 2. DORSAL VIEW, x 1. 



c. chelicene : c. t. cephalo-thoracic shield; a. 1 -a. 7 segments of the 

 prse-abdomen. 



FIG. 3. LARGE CLAW, x 1. 



FIG. 4. PECTINE DETACHED, x 2. 



FIG. 5. HEAD REGION : DORSAL ASPECT, x 1. 



c. chelicerae : c. t. cephalo-thoracic shield : in. e. marginal eyes : 

 e. eyes on the middle of the shield. 



FIG. 6. LUNG SACS : VIEW FROM BEHIND, x 1. 



p. s -p. 6 third to sixth segments of the prse-abdomen with the lung 

 sacs : p. 7 seventh segment of the prse-abdomen. 



FIG. 7. LUNG SAC ENLARGED, x 6. 



s. stigma : I. lamellae composing the lung-book. 



