STALK-EYED CRUSTACEA 497 



The external maxillipedes have an external appendage. 

 The legs have external appendages ; first and second pair 

 compressed, slender, with long parallel fingers ; three 

 posterior pairs short. Abdomen has the fifth segment 

 more or less abruptly curved ; appendages two-branched ; 

 swimming organ well developed ; telson long, narrow, and 

 tapering. 



The gills are attached to the chest wall of the five last 

 segments, to the membrane between the body and the first 

 joint of all the legs except the last pair. The branchial 

 plates are only rudimentary, and on the first joint of the 

 two maxillipedes. 



Range. — West Indies, China Sea, Sea of Japan, Bass 

 Strait ; in moderately deep water. 



I. Leptochela serratorbita. 



Leptochela serratorbita . . . Spence Bate. 



Orbital margin fringed with a series of small teeth. 

 Dorsal surface of fifth and sixth segment of the abdomen 

 smooth. External maxillipede furnished with a large and 

 pointed tooth. 



Range. — St. Thomas. 



Order II. Stomapoda. 



Stoniapoda . . . Latreille, Miers, Dana. 



Stoviatopoda . . Brooks. 



Stomapodes . . . H. Milne Edwards. 



Anoniobranchiata . Dana. 



The gills (when present) are not covered by the 

 carapace, but are exposed, attached to the base of the 

 legs or to the abdominal appendages. The maxillipedes 

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