LITHODES. 
LITHODES. Latreille , Leach. 
MAJA. Bose. 
INACHUS. Fabricii. 
CANCER. LinnS, $c. 
Antenna externa corporis dimidii longitudine, setacese, sub oculos externe insert*, spina ad 
ba^it exteriorem. 
Interna porrcctm, elongatse, setis duabus com press is, multiarticulatis instruct*. 
Pedipalpi externi articulo secundo interne dilatato, denticulato. 
Pedes decern ; par anticum inagquale, didactylum ; digitis interne excavatis : paria 2, 3, et 4, 
consimilia, ungue terminata ; par posticum minutum, spurium, adactylum. 
Testa triangularis, spinosissima, antice rostro elongato, instructa. 
Oculi ad basin approximate, pedunculo haud crassiores. 
Abdomen { in utroque sexu?) membranaceum, squamis crustaceis ; articulis primo et ultimo 
crustaceis. 
External antennae setaceous, half the length of the body, inserted under the eyes externally, 
with a spine at their exterior base ; internal antennae porrected, elongate, terminated by two 
compressed many-jointed setae. External pedipalpes with the second joint internally dilated and 
denticulated. Legs ten: anterior pair unequal, didactyle ; the fingers internally excavated; 
second, third, and fourth pairs alike, and terminated by a claw ; hinder pair very small, 
spurious, and simple. Shell triangular, very spiny, anteriorly terminated by an elongate 
rostrum. Eyes not thicker than their peduncles, their bases approximating. Abdomen (in both 
sexes?) membranaceous, with crustaceous scales; the first and last joints entirely crustaceous. 
The situation of this anomalous genus, which was classed with the Maj.e by Lamarck, is 
extremely doubtful. In the form of its pedipalpes and external antenna-, and in the position of 
the eyes, it approaches the Macrourous Malacostraca. 
