I. CRUSTACEA: DECAPODA 



381 



cases of symbiosis (p. 158) Eiipagurus* Clibanarius* Allied is Birgtis, palm 

 crab of the islands of the Indian Ocean; its respiratory organs referred to on 

 p. 378. Sub Order II. BRACHYURA. Body depressed; abdomen rudi- 



sr 



FIG. 403. FIG. 404. 



FlG. 403. Phyllosoma larva (Mysis-stage) of Pali minis (after Gerslacker). 

 A, abdomen; C, head; T, thorax; a and /, exopodites and endopodites of thoracic 

 feet. 



FIG. 404. Megalops larva of Portunus (from Lang, after Claus). 2, anterrw; IV- 

 VIII, thoracic appendages; a 2 - 6 , abdominal somites (a 6 is the seventh). 



FIG. 405. Pandulus montagui* 



FIG. 406. Eiipagurus bcmhtirilus, hermit 

 crab (from Emerton). 



mentary and folded in a groove under the cephalothorax; antenna? short; never 

 more than one pair of feet chelate; ventral nerve cord concentrated ((\^. 402). 

 Some inconspicuous groups like the PORCELLANID.E, the HIPPID.E, and the 



