Revision of the Nomenclature of the Brachyum. 157 



genus, making C. niger the type, and this meaning has clung to 

 it to the present day. In restoring Clorodiusto its original status, 

 it becomes a synonym of Atelecyclus Leach, 1814. Chlorodiella, 

 nov., is proposed for Chlorodius Milne Edwards. 



Stenocionops Leach, MS., while not adopted by Desmarest, 1823, 

 was said to include Mala tauriis Lamarck, 1818, which is synony 

 mous with Cancer cornudo Herbst, 1804, * and 0. farcatus Olivier, 

 1791. Later, in 1825, the generic name was transferred by La- 

 treille to the species cervicornis Herbst, 1803, which has ever since 

 been regarded as the type. In its rightful meaning, Stenocionops 

 takes the place of Pericera Latreille, Encyc. Meth., X, 699, 1825. 

 S. cervicornis may be known as Ophthalmias (nov.) cervicorms. 



Naxia, a manuscript name of Dr. Leach, was first defined and 

 published, but not adopted, by Latreille, Encyc. Meth., Entom., 

 X, 140, 1825, and one species assigned to it, Pisa aurita, nov. 

 Naxia of Milne Edwards, 1834, has a different definition and con 

 tains only the species serpulifera Guerin ; it should be consid 

 ered a synonym of Naxioides A. Milne Edwards, 1865. 



Ilalimus was very briefly described by Latreille in Cuvier's 

 Regne Animal, ed. 2, IV, 60, 1829. No type was specified, but 

 a single species, H. aries Latreille, is figured in Guerin's Icono- 

 graphie. As this was the only species previous to 1834, it must 



* Perhaps no single copy of Herbst's ' Naturgeschichte der Krabben und 

 Krebse' contains all the title pages of the different parts, and hence quo 

 tations from this work are full of inaccuracies. The following table gives 

 the date of issue, number of plates, signatures, and pages of each Heft : 



