CORYSTES. 
CORYSTES. Latreilie, Leach, Lamarck. 
ALBUNEA. Fabdricii, Bosc. 
CANCER. Pennant, Herbst. 
Antenne extcriores corpore longiores, setacee, utrinque ciliate ; segmento tertio ex articulis 
eloneatis, cvlindricis efformato. 
rni caulis interni articulo secundo (primo longiore) augusto, apice angus- 
nm: “At aKED latere interno laté emarginato. 
a iticum majus equale, didactylum, digitis deflexis; maris corpore duplo 
RY eae ndricum, manu gradatim subcrassiore, subcompressd ; FEMINE corporis 
4 U Y . . . oe. . . . . 
_ 4 / ; iu compressa: paria reliqua tibiis tarsisque longitudine subaqualibus, 
3 tis, rectis, acutis, longitudinalitér sulcatis instructa. 
ey, Dei en eee es 
mes, / 5/626, 
| ey 
, culatum; articulo primo transverso-linéari ; secundo longiore utrinque 
nducto ; tertio wqualitér subquadrato; quarto precedente angustiore, 
’ quinto angustiore, subtriangulari apice rotundato : 
iculatum ; articulis sex primis transversis anticé arcuatis ; septimo trian- 
Je ¥ %~ ice’rotundato. 
anticé subrostrata, posticé truncata, marginata: orbita superneé fissura una. 
ivi haud crassiores. 
@ longer than the body, setaceous, ciliated on each side: the third segment 
e, cylindric joints. External double féetpalpes, with the second joint of the 
nger than the first), narrow, its point more slender and rounded ; its internal 
Legs ten: anterior pair largest, unequal, didactyle, with deflexed fingers ; 
he length of the body, subcylindric ; the hand gradually somewhat thicker, 
and subcompressed : of the rematy the length of the body; hand compressed: other legs with 
the tibia and tarsi of subequal length: claws clongate, straight, sharp, longitudinally sulcated. 
Abdomen of the mae five-jointed: first joint transverse-linear; second longer, produced on 
each side behind; third equally subquadrate; fourth narrower than the third, transverse ; fifth 
narrower, subtriangular; the apex rounded: of the FEMALE seven-jointed ; six first joints 
transverse anteriorly arcuated; seventh triangular, its apex rounded. Shell oblong-ovate, 
anteriorly subrostrated, behind truncate, margined: orbit above with one fissure. Eyes not 
thicker than their peduncles, which bend backward. 
One species only of this genus, has hitherto been noticed by naturalists, and of its economy 
and mode of life nothing is known. 
