CRUSTACEA. 673 
Dorippe Dauv., FABR. Shell depressed, anteriorly narrower, 
truncated. Second and third pairs of feet very long, with last 
joint long, subulate; fourth and fifth pairs dorsal, short, subcheli- 
form. ‘Tail inflected downwards. 
Sp. Dorippe lanata Bosco, Cancer lanatus L., DEsMAR. Crust. Pl. 17, fig. 2 ; 
from the Mediterranean. 
B. Feet all in the same horizontal plane inserted at the inferior 
surface of sternum. ‘Tail always inflected downwards. 
+ Area of mouth (space bounded by the third pair of maxilli- 
form feet) triangular, anteriorly narrower, often produced almost as 
far as the anterior margin of shell. Third pair of maxilliform feet 
slender or narrowed anteriorly, triangular. 
Family XXX. Oxystomata Epw. (in part). 
Corystes Latr. External antenne setaceous, ciliated, very long. 
Shell oblong, oval. First pair of feet cheliform, the rest with last 
joint subulate, acute, elongate. 
Sp. Corystes dentatus, Albunea dentata Fasr., DEsMAR. Crust. Pl. 3, fig. 2, 
Beit Brit. Crust. p. 129, buries under the sand, sending out the antennz 
alone above it; the males have shears of twice the length of the body. This 
species is found on the English and French coasts. 
Atelecyclus LEACH. 
Add genus Thia LEACH and some others, on which see MILNE EDwarDs 
Hist. nat. des Crust. U1. pp. 141—I51. 
Leucosia Fasr., LATR. External antenne very small, internal 
concealed in little pits. Eyes minute. Shell solid, mostly rotundato- 
ovate. Branchial cavity closed below, no fissure at the bases of 
maxilliform feet. Tail with four or three segments. 
Several sub-genera proposed by Leacu: /phis, Nursia, Persephona, 
Ixa, Philyra, Ebalia, Myra, Ilia. Add Oreophorus Rurpp. 
Note.—Here also Bellia Epw., a new genus, seems to be referrible. See 
Ann. des Sc. nat., 3ieme Série, Tom. 1x. 1848, Zoolog. p. 192. 
Sp. Leucosia craniolaris FaBr., DESMAR. Crust. Pl. 27, fig. 2. 
Hepatus LATR. 
Matuta Fasr. Antenne short, external minute. Two anterior 
feet short, with chela concave internally, crested above; remaining 
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