THE DECAPODA 



267 



from the second and third segments of the limb. Coutiere, how- 

 ever, states that in some primitive Caridea the double proximal 



FIG. 157. 



Mouth-parts of Pandalus borealis (Caridea). (After Sars.) A. mandible ; B, maxillula ; C, 

 maxilla ; D, first maxilliped ; E, second maxilliped. e, proximal endite of maxilla (accord- 

 ing to Boas, the small distal lobe alone represents the endite and the large proximal lope does 

 not represent the proximal division of the endite in other Decapoda) ; en, endopodite ; ep, 

 epipodite ; ex, exopodite ; i, incisor process ; m, molar process of mandible ; mb, mastigobranchia ; 

 p, palp ; pb, podobranchia ; sc, scaphognathite of maxilla ; *, lobe on exopodite of first maxilliped 

 characteristic of Caridea, 



B 



Fio. 158. 



A, maxillula of Peiuieu* camnote ; 1-4, palp of four segments ; ex, exite connected with 

 proximal endite. B, first maxilliped of same ; 1-5, endopodite of five segments ; ep, epipodite ; 

 ex, exopodite. (After Boas.) 



endite can be seen to belong to the first segment, and that the 

 other two lobes are independent of each other, belonging respectively 



