hearing on the orujin of Insects. 



153 



eight anterior ventral appendages;" but the precise position 

 on tlie legs which these appendages occupy appears never 

 to have been indicated ; they are articulated to the upper 



Fio". 2. 



^f\ 



Fig. 2. (A) Metathoracic leg of 3Iachilis maritima; (B) leg of Scolo- 

 2>endrella sp. ; (C) fifth thoracic appendage (XI) of Pencils 

 Dobsoni; a, exopodite; b, endopodite; ejj, epipodite; 1, 2, 3, 4, 5, 

 the five joints of the ambulatoiy branch of the limb, which in 

 (A) and (C) is here considered to be an endopodite, but in (B) 

 an exopodite. 



and outer edge of the legs at a point Avhcre a distinct 

 angulatc suture indicates that the coxa is composed of 



