182 CRUSTACEA. 



884, 5, Ivi; Inachus cornutus, Fab. It is very common on the coast 

 of France and in the Mediterranean, where it is called Araignee de 

 mer. It is one of the largest of the European Crustacea, and the 

 Maia of the ancient Greeks, figured on some of their coins. They 

 attributed great wisdom to it, and considered it as sensible to the 

 charms of music. 



MiciPPE, Leach. 



The first joint of the lateral antennae curved, dilated at its supe- 

 rior extremity into a transverse and oblique blade, closing the ocular 

 fossae ; the ensuing joint inserted under its superior margin. The 

 shell, viewed from above, appears widely truncated before; its an- 

 terior extremity is inclined, and terminates in a sort of clypeus or 

 dentated rostrum *. The 



SrKNocioNOPb', Leach, 



Is distinguished from all other subgenera of this tribe by long and 

 slender ocular pedicles Avhich protrude from their fossulyef 



There the under surface of the feet presents neither ranges of den- 

 tations nor claviform cilia. Those of the first pairs, at least, are one 

 half longer than the shell, and frequently much longer. The body 

 is usually more abbreviated than in the preceding subgenera, being 

 either nearly globular, or formed like a shortened egg. 



A species of this tribe, — Maia rehtja. Coll. du Jard. du Roi, 

 whose shell is Avoolly and forms a truncated ovoid, or is obtuse 

 anteriorly ; whose strongly curved elongated ocular pedicles are 

 received into fossulrc situated under the lateral margin uf the 

 shell ; whose carpus is elongated as in Maia ; — presents another 

 character which exclusively distinguishes it, viz. the length of 

 the feet seems to augment progressively from the second pair on- 

 wards, or at least to differ but little. It is the type of the genus 



Camposcia, Leach. 



In the others, as usual, the length of the feet progressively di- 

 minishes from the second pair to the last. 



In some of them, the ocular pedicles, although much shorter than 

 in the Stenocionops, are always salient, and the third joint of the 

 pedicle of their lateral antenna^ is as long, or even larger, than the 

 preceding one, the antennpe themselves terminating in a long seta- 

 ceous stem. The approach the Micipijes ; such is the 



Halimus, Latr.l 



In those which constitute the two following sub-genera, the ocular 



* Cancer cristatus, L. ; Rumph., Mus., VIII, i, the male. — Cancer phylira, 

 Herbst. Iviii, 4 ; Desiftar. Consider., XX, 2. 



f Cancer cen-iconiis, Herbst., Iviii, 2, from the Isle of France. M. Desmarest 

 •was mist.iken in citing, as the type, Consid. Gen. sur les Crust., p. 153, the 

 Maia faurus, Lamarck. 



X Two species, one of which arpears to be allied to the Cancer superciliosus, 

 L. ; Herbst, XIV, 89. 



