CHAPTER XV 



THE DECAPODA 



Order Decapoda, Latreille (1802] 

 Sub-Order 1. Natantia. 



Deji nitron. — Eucarida in which the caridoid facies may he 

 retained or may be greatly modified ; the exopodite of the maxilla 

 is very large (scaphognathite) ; the first three pairs of thoracic 

 limbs are specialised as nmxillipeds ; branchiae typically in several 

 series, attached to the coxopodites of the thoracic limbs (podo- 

 branchiae), to the articular membranes (arthrobranchiae), and to the 



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