334 
THE VOYAGE OF H.M.S. CHALLENGER. 
Challenger and of the Museum, as is also Cymopolia gracilis, Smith, it is therefore 
impossible for me to draw up a satisfactory description of the genus, the typical species 
of which are, however, sufficiently distinguished from Dorippe and Ethusa by their 
much more broadly tranverse carapace, with dentated (not spinose) front, and dentated 
antero-lateral margins, and by the nearly quadrate, not triangulate, buccal cavity, in 
which characters they more nearly resemble certain Catometopa than the Oxystomata. 
The afferent channel to the branchiae opens immediately at the bases of the chelipedes, 
and is not separated from them, as in the species of Dorippe. 
This genus is not very nearly allied either to Dorippe or Ethusa, and should not 
perhaps be referred to the same family, but it is retained in the vicinity of Ethusa by 
A. Milne Edwards and other authors, and here, accordingly, I retain it for the present. 
The following species have been described : — 
Cymopolia car onii, Eoux. Mediterranean; Cape Verde Islands. 
Cymopolia jukesii, White. North and North-East Australia; Sir C. Hardy 
Island ; Celebes Sea (to 1 0 fathoms). 
Cymopolia obesa, A. Milne Edwards. ' 
Cymopolia dilatata, A. Milne Edwards. 
Cymopolia dentata, A. Milne Edwards. 
Cymopolia cristatipes, A. Milne Edwards. Gulf of Mexico and Florida Straits 
Cymopolia cursor, A. Milne Edwards. f (to 298 fathoms). 
Cymopolia gracilipes, A. Milne Edwards. 
Cymopolia sica, A. Milne Edwards. 
Cymopolia acutifrons, A. Milne Edwards. 
Cymopolia gracilis, Smith. New England (to 142 fathoms). 
Cymopolia whitei, Miers. Seychelles (4 to 12 fathoms). 
Cymopolia caronii, Roux. 
Cymopolia caronii, Eoux, Crust, de la Mediterranee, pi. xxi. figs. 1-7. 
„ „ Milne Edwards, Hist. Nat. Crust, vol. ii. p. 159, 1837. 
„ „ Lucas, Animaux articules in Explor. Sci. de l’Algerie, Crust., p. 25, pi. 
iii. fig. 1, 1849. 
,, „ Heller, Crust, des siidlichen Europa, p. 140, pi. iv. fig. 8, 1863. 
St. Vincent, Cape Verde Islands, July 1873. An adult female, bearing ova. 
? . Lines. Millims. 
Length of carapace, . . . . . . . 44 9 '5 
Breadth of carapace, rather over . . . . . 5 11 
The specimen agrees closely with the figure of Roux, and with specimens referred to 
this species from the Canary Islands, in the collection of the Museum, but the merus- 
joints are perhaps slightly more dilated than is usual. 
