DECAPODA 



369 



cp, h 4 



t.i.ad. \ 

 6 'Lo,ak 



Fig. 274. Mouth parts of the right-hand side of Carcinus maenas. From 

 Borradaile. i, Third maxilliped. 2, Second maxilliped. 3, First maxilliped. 

 4, Maxilla. 5, Maxillule. 6, Mandible, ac. " accesspry " muscles which curve 

 the surface of the scaphognathite during its scooping action; ap. apophysis; 

 art. articular process ; b. basipodite ; c. carpopodite ; cp. coxopodite ; cp.s. coxo- 

 poditic setae; d. dactylopodite ; e7t. endopodite; ep. epipodite; et.i, et.z, en- 

 dites; ex. exopodite;_^. flagellum;/?^. flange to which is hinged the epipodite; 

 h. hinge : the adjoining dotted lines show the position into which the epipodite 

 can be flexed by pressure against the base of the cheliped ; i. ischiopodite ; 

 i.l. inner lacinia (endite) ; 1.1,1.2, lobes (each bearing two endites) ; m. mero- 

 podite; o.l. outer lacinia (endite); p. propodite; pb. podobranch; pip. palp; 

 sc. scaphognathite; t.i.ad. tendon of inner adductor muscle ; t.o.ab. tendon 

 of outer abductor; t.o.ad. tendon of outer adductor. 



24 



