23 
was used by Brisson, 1760, for a genus of birds, accepted by 
many ornithologists. (Proc. Biol. Soc., Washington, Vol. XI., 
p. 160, 1897). For the well-known species Maza squinado 
(Herbst) I propose the generic name Mamata, and this slight 
alteration will naturally apply to all such higher divisions as 
have taken their designations from the genus under its earlier 
name. 
Gen. Micippa, Leach. 
1817. Micippa, Leach, Zoological Miscellany, Vol. III., p. 15- 
1825. Micippa, Desmarest, Consid. gén. Crust., p. 148. 
1829. Micippe, Latreille, Régne Animal, Vol. IV., p. 59. 
1834. Micippe, Milne-Edwards, Hist. Nat. Crust., Vol. I. 
Pp: 329. 
1839. Micippe, de Haan, Crust. Japonica, decas quarta, p. 85. 
1879. Micippa, Miers, Journ. Linn. Soc. London, Vol. XIV., 
p- 0OL 
1895. Micippa, Alcock, Journ. Asiat. Soc., Bengal, Vol. LXIV., 
Pt: 2; pps167,- 238-246. 
Numerous other references will be found in Alcock’s work 
either under the genus or its species. It may be mentioned 
tht Desmarest gives the name correctly as Micippa, though 
by appending a French form of it, Micippe, he probably helped 
to mislead several of his successors. Alcock places this genus 
in an alliance Periceroida, Miers and Miss Rathbun assign it 
to a sub-family Micippinae, to which the latter writer (Proc. 
Nat. Mus., Vol. XVI., p. 65, 1893) allots, besides Mzcippa, 
the four genera Criocarcinus, Picrocerus, Pseudomicippe, and 
Paramicippa, all of which are placed by Alcock in a separate 
alliance Stenocionopoida. 
The Periceroida are characterised as follows :—** Carapace 
usually broadened anteriorly by the outstanding orbits; the 
orbits are either nearly or quite complete above and below, 
being formed by a strongly-arched supra-ocular caae in close 
contact with an excavated post-ocular lobe, a process of the 
basal antennal joint filling in the floor below.” Mucippa is 
distinguished by having “ Carapace oblong ; rostrum broadly 
laminar, vertically or nearly vertically deflexed; orbits 
complete but shallow.”. (Alcock, loc. cit., p. 238). In the 
description of M. thalia, however, Alcock points out that in 
that species ‘ the floor of the orbit is incomplete.” 
