LITHODES. 
LITHODES. Latreille, Leach. 
MAJA. Bose. 
INACHUS. Fablricii. 
CANCER. Linné, Sc. 
Antenne externe corporis dimidii longitudine, setacee, sub oculos externé insert, spina ad 
basin exteriorem. 
Interne porrecte, elongate, setis duabus compressis, multiarticulatis instructe. 
Pedipalpi externi articulo secundo interné dilatato, denticulato. 
Pedes decem ; par anticum inequale, didactylum ; digitis interne excavatis : paria 2, 3, et 4, 
consimilia, ungue terminata ; par posticum minutum, spurium, adactylum. 
Testa triangularis, spinosissima, anticé rostro elongato, instructa. 
Oculi ad basin approximati, pedunculo haud crassiores. 
Abdomen (in utroque sexu?) membranaceum, squamis crustaceis ; articulis primo et ultimo 
crustaceis. ; 
a 
External antenne setaceous, half the length of the body, inserted under the eyes externally, 
with a spine at their exterior base ; internal antenne porrected, elongate, terminated by two 
compressed many-jointed sete. 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 Masz by Lamarck, is 
extremely doubtful. In the form of its pedipalpes and external antenne, and in the position of 
the eyes, it approaches the Macrourous Malacostraca. 
