CHAPTEK XV 



THE DECAPODA 



Order Decapoda, Latreille (1802). 

 Sub-Order 1. Natantia. 



Tribe 1. PEN ABIDE A. 

 2. CARIDEA. 

 3. STENOPIDEA. 



Sub-Order 2. Reptantia. 

 Section 1. PALINURA. 

 Tribe 1. ERYONIDEA. 



2. SCYLLARIDEA. 



Section 2. ASTACURA. 



Tribe NEPHROPSIDEA. 

 Section 3. ANOMURA. 



Tribe 1. GALATHEIDEA. 

 2. THALASSINIDEA. 

 3. PAGURIDEA. 

 4. HIPPIDEA. 



Section 4. BRACHYURA. 

 Tribe 1. DROMIACEA. 

 Sub-Tribe 1. DROMIIDEA. 

 2. HOMOLIDEA. 



Tribe 2. OXYSTOMATA. 

 3. BRACHYGNATHA. 

 Sub-Tribe 1. BRACHYRHYNCHA. 



2. OXYRHYNCHA. 



Definition. Eucarida in which the caridoid facies may be 

 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 maxillipeds ; branchiae typically in several 

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

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



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