AMPHIPODA. 



Terminology. 



(See PI. I) 1 . 



Divisions of Body: 



C Cephalon ) . 



\ Anterior Division. 

 Ms. Mesosome | 



Mts Metasome \ 



\ Posterior Division. 

 Us. Urosome | 



Appendages of Cephalon: 



a 1 . Superior antennae (peduncle, flagellum, secondary appendage). 



a*. Inferior antennae (basal joint (b), olfactory spine (ol), peduncle, ilagellum). 



L. Anterior lip (buccal plate, epistome). 



1. Posterior lip (lobes, lateral corners). 



M. Mandibles (body (b), masticatory part, cutting 



edge (c), molar expansion (in), palp (p)). 

 m 1 . First pair of maxilhe (basal part (b), basal 



lobe (I 1 ), masticatory lobe (I 2 ), palp (p)). 

 m 2 . Second pair of maxilla? (basal part, inner and 



outer lobes). 

 mp. Maxillipeds (basal part (b), baaal lobes (I 1 ), 



masticatory lobes (I 2 ), palp (p)). 



(Eyes. Rostrum, Lateral corners). 



Appendages of Mesosome : 



p 1 . First pair of legs, or anterior gnathopoda. 

 p 2 . Second pair of legs, or posterior gnathopoda. 

 p 3 p 7 . Third to seventh pairs of legs, or first to fifth pairs of pnvio|.oda. 



Joints in all the legs: 

 1. coxal, 2. basal, 3. ischial, 4. meral, o. carpal, propodal. 7. terminal, or dactyltis. 



Appendages to the legs: 

 br. branchial lamella, i. incubatory lamella. 



I1K18S. 



') The same lettering is used in all the jilatos to designate the corresponding part.-. 



