( 192 ) 



The fenuii- is comparatively shorter thau in the other races, and much shorter 

 than in T. ephippium. The head is of an oval shajic, separated from the trochanters 

 by a fossa as broad as long, and not raised above the level of the larger trochanter ; 

 trochanters connected by a somewhat contracted bridge. The remainder of the 

 bones of the hind-limb do not show any noteworthy modification. The rudimentary 

 fifth digit is reduced to a small conical bone, attached to the outer tarsal of the 

 distal series. 



PL XVI. 

 PI. XVII. 



PI. XVIII 

 PL XIX. 



PI. XX, 



PI. XXI. 



EXPLANATION OF PLATES (Testiido galapagoetisis). 

 Upper and lower views of carapace of male (Boston Mus.), Jth natural 



size. 

 Fig. A. Side view of carapace of male, Jth natnral size. 

 Fig. i!. Lower view of carapace of female (Mus. Compar. Zoo!.), 



Ith natural size. 

 Lower view of skull of male, natural size. 

 Fig. A. Side view of skull of male. 

 Fig. 1!. Side view of skull nt/rmale. 

 Fig. c. Upper and side views of seventh cervical vertebra of male. 



All figures of natural size. 

 Fig. A. Side view of first. 

 Fig. js. Three views of third. 

 Fig. c. Three views of fourth cervical vertebra of male. 



All figures of natnral size. 

 Front and side views of jielvis of male, with tlie first and second 

 caudal vertebrae attached, fjrds natural size. 



