LEUCONID A:—NANNASTACID.E 305 
Fudorella, Norman, 1867, is a name substituted for 
the preoccupied Hudora, Spence Bate, 1856. It 
has an oval orifice between the antero-lateral lobes 
of the carapace, the pseudo-rostral projection 
wanting, and the first antenne geniculate between 
the last two joints. It contains eight species, 
among which KHudorella emarginata (Kroyer) and 
Eudorella truncatula (Spence Bate) are British. 
Ludorellopsis, Sars, 1882, has the body short and stout, 
the median lobe of the carapace not excavate, and 
the first antennz geniculate between the first two 
joints. It contains two species, Hudorellopsis de- 
formis (Kroyer) and Hudorellopsis integra, S. I. 
Smith. 
Family 4.—Nannastacide. 
There may be either one eye or two eyes. The first 
antennze are alike in both sexes, the flagella very unequal, 
the smaller one- or two-jointed. The flagellum of the second 
antennee in the male has rather long slender joints. 
The mandibles have few spines on the anterior branch. 
The epipod of the first maxillipeds has the branchial sacs 
in the female very slightly developed. The third maxil- 
lipeds have the terminal part irregularly flexuous. The 
first two pairs of perzeopods in the female and the first 
four in the male have well-developed swimming-branches. 
The last three pairs of perzeopods are very slender and 
end in a curved finger. The pleopods are wanting in 
both sexes. The inner branch of the uropods is one- 
jointed. The telson is wanting. 
Sars calls this family the Cumellide, but Spence 
Bate’s name Nannastacide has clear priority. It contains 
three or four genera. 
Nannastadcus, Spence Bate, 1865, means ‘a dwarf lob- 
ster.’ It has two distinct compound eyes. The carapace 
is broad in front or with elongate pseudo-rostrum. The 
British species, Nannastacus unguiculatus, Spence Bate, and 
Nannastacus Suhmiu, Sars, from the Philippines, have the 
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