HOMOLOGIES OF THE CRUSTACEAN LIMB. 409 
Fic. 35.—Maxillaof lobster, 
with its five lobes (1-5) cor- 
responding to the endites of 
the Phylopod thoracic limb. 
Fic. 34.—Section through the thorax of Apus: en, 1-6, 
the six endites; ex, exopodal or respiratory portion of 
the limb; c, carapace. 
r €7u . 
Fic. 36.—Partly diagrammatic sec- 
tion through the thorax of Nebalia: en, 
the axial-jointed endopodite; ez, exital 
portion or gill (above irregularly dot- 
ted) and flabellum below with rows of 
dots; ¢, carapace. 
¥Fia. 87.—Actnal section through the abdomen of 
Limulus: ¢, carapace; ht, heart; int. intestine; ng, 
ganglia (lett@ring being the same as in Tig. 86); en, 
axial, jointed endopodite; ez, exital or respiratory 
portion bearing the gill-lamelle; the outer division 
(ex) homologous with the exopodal portion of the 
Phyllopod and Phyllocaridan appendage. 
