P E N M I D E A. 6 qq 



Family EUCOPIDiE. 



Genus EUCOPIA (Dana). 



Pedes quatuordecim (maxillipedibus 2dis Ztiisque pediformibus inclusis) 

 totispalpo natatorio maxima instructs, ramo parium trium anticorum 

 pediformimonodactylo et prehensili, parium quatuor reliquorum tenuiter 

 vergiformi. Carapax non rostratus. Antennae longce, primce flagellis 

 duobus confectce, et secundce lamind basalt. Lamina caudalis externa 

 prope apicem artkulata. Oculi breviter pedunculati. 



Feet fourteen in number, the second and third pairs of maxillipeds 

 being pediform, all furnished with a long natatory palpus; pediform 

 branch of anterior six monodactyl and prehensile; of the following 

 eight, vergifbrm. Carapax not rostrate. Antenna? long, first pair 

 with two flagella, second with a basal lamina. Outer caudal lamella 

 jointed near apex. Eyes on short peduncles. 



The species of this genus have the habit of a Schizopod. Yet, three 

 of the pairs of feet (corresponding normally to two pairs of maxillipeds 

 and one pair of feet) are subcheliform. They might be arranged with 

 the Anomobranchiata, were it not that they have the completeness of 

 structure of the true Macroura, and diifer only in the palpiform nata- 

 tory appendage of the thoracic legs. There are distinct branchise 

 under the carapax, and the outer caudal lamella is jointed, which cha- 

 racters are not found in the true Anomobranchiates. 



The other generic characters may be stated under the description of 

 the following species. 



EUCOPIA AUSTRALIS. 



Carapax fronte truncato-rotundatus, margine postico profunde excavatus. 

 Segrnentum abdominis penultimum ultimo longius, ultimum subulatum, 

 lamellis caudalibus vix longius. Antennm interna? externis paido 

 breviores, dimidii corporis longitudine, flagello uno brevi; externarum 

 squama basalis basi internarum multo longior. Maxillipedes 2di et 



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