260 A HISTOEY OF RECENT CEUSTACEA 



gaster ingens by Dr. Dolirn in 1870. This is the largest 

 species, the specimens measuring rather more than six 

 inches, while those of Gnathophausia gigas, v. AVilleuioes 

 Suhm, measure rather less than six inches. Vivid red 

 and magnificent carmine appear to be the prevalent 

 colouring in the genus. It is probable that the two 

 species mentioned, too-ether with two others, calcarata, 

 Sars, and gracilis, v. Willemoes Suhm, will be eventually- 

 retained in this genus to the exclusion of the other 

 species, which are destitute of the rudimentary exopod on 

 the first maxillipeds. 



Chalairispis alata is accepted by Sars from the drawings 

 and manuscript notes of v. Willemoes Suhm, but there 

 was no specimen in the Challenger collection by which to 

 control these records. 



Family 2. — Eucopiidce, 



The carapace is very large, membranous, with the 

 lateral margins produced over the base of the pleon. The 

 segments of the trunk are all well defined. The first 

 maxillipeds are nearly as in the Lophogastridas ; the three 

 following pairs of appendages are inclined towards the 

 parts of the mouth, and have a rather short and powerful 

 structure, while the next three pairs are exceedingly long 

 and slender, with nearly straight acute fingers, the remain- 

 ing pair being shorter and less slender, not at all prehen- 

 sile. The branchise, marsupium, and pleopods are nearly 

 as in the Lophogastrid^. The development is unknown. 



The family contains but one genus. 



JEucopia, Dana, 1852, has but a single species, Eucojna 

 australis, Dana. This has no rostrum ; the eyes are small, 

 the scale of the second antennae large, the mandibular 

 ' palp ' very slender, the first maxillae with no reflexed ap- 

 pendage, the second with a very large strongly fringed 

 exopod. The first maxillipeds have a rather small exopod, 

 but the epipod ' enormously developed, lanceolate in form, 

 and of a very soft and almost spongy structure.' The three 

 pairs of legs preceding the last, remarkably long and 



