NO. 9 



MUSCULATURK OF THE KLUli CRAH COCHRAN 



47 



I/O. Muscnlns proinotor coxopoditis II pedis spur'ii (fig. 14 B). — 

 This heavy muscle arises on the anterior margin of the second ahdomi- 

 nal segment lying entirely beneath the first pleopod. It is inserted on 

 the inner proximal part of the coxopodite, which is erected by its 

 contraction. 



174 173 175 



Fig. 14. — The pleopods. 



A, the first pleopod of the male. 



166, musculus promoter coxopoditis I pedis spurii ; idy, musculus abductor 

 basipoditis I pedis spurii ; 168, musculus adductor basipoditis I pedis spurii ; 

 169, musculus abductor flagelli I pedis spurii. 



B, the second pleopod of the male. 



i/^o, musculus promotor coxopoditis II pedis spurii; lyi, musculus adductor 

 basipoditis II pedis spurii ; lyj, musculus abductor flagelli II pedis spurii. 



C, the first pleopod of the female. 



173, musculus promotor coxopoditis I pedis spurii ; 174, musculus abductor 

 coxopoditis I pedis spurii ; 175, musculus adductor coxopoditis I pedis spurii : 

 176, musculus reductor basipoditis I pedis spurii ; 177. musculus abductor 

 exopoditis I pedis spurii ; 178, musculus adductor exopoditis I pedis spurii. 



///. Musculus adductor basipoditis II pedis spurii (fig. 14 B.) — 

 Arising in numerous strands on the inner postaxial wall of the coxo- 

 podite, this muscle is attached to the inner proximal border of the 

 basipodite, which is brought toward the center by its contraction. No 

 abductor of the basipodite is present in this appendage, as the elas- 

 ticity of the membrane apparently gives the necessary opposition to 

 the adductor. 



