HOMOLOGIES OF THE CRUSTACEAN LIMB. 



409 



Fig. 35.— Maxilla of lobster, 

 ■with it8 live lobes (1-5) cor- 

 responding to-the endites of 

 the Phyllopod thoracic limb. 



!FiG. 34.— Section through the thorax of Apus: en, 1-6, 

 the six endites ; ex, exopodal or respiratory portion of 

 the limb; c, carapace. 



!FlG. 36. — Partly diagrammatic sec- 

 tion through the thorax of Nebalia : en, 

 the axial-jointed endopodito; ex, exital 

 portion or gill (above iri-egularly dot- 

 ted) and flabellnm below with rows of 

 dots; c, carapace. 



IflG. 37.— Actual section through the abdomen of 

 Iiimulus: c, carapace; lit, heart; int. infe.stine; ng, 

 ganglia (lettering being the same as in Pig. 36) ; en, 

 axial, jointed endopodite; ex. exital or respiratory 

 portion bearing the gill-lamollffi; the outer division 

 (ex) homologous with the exopodal portion of the 

 Phyllopod and Phyllocaiidan appendage. 



