Species of Micippa and Paramicippa. 3 



In the present revision of the genus Micippa six species 

 are regarded as well established, besides several marked 

 varieties, some of which may prove to be specifically distinct. 

 I follow Dr. Kossmann in restricting tire genus Paramicippa 

 to the single species P. tuberculosa, with which I am able to 

 identify the species described by myself as Micippa parviros- 

 tris by the aid of drawings of Milne-Edwards's type speci- 

 men, very kindly sent to me by Prof. A. Milne- Edwards, 

 which are here published with his permission. 



Micippa. 



Micippa, Leach, Zoological Miscellany, iii. p. lo (1817); Milne-Ed- 

 wards, Hist. Nat. Crust, i. p. 329 (1834); Kossmann, Malacoatraca 

 in Zoolog. Ergebnisse einer Reise in die Kiistengeb. des Rothen 

 Meeres, p. 4 (1877) ; Miers, Journ. Linn. Soc, Zool. xiv. p. G61 (1879J. 



Carapace nearly oblong, depressed, rounded behind, with 

 the dorsal surface spinose, granulated or tuberculated, some- 

 times with a lateral series of marginal spines or spinules. 

 Interorbital space broad, the orbits deep, with one or two 

 fissures in the superior margin and usually in the inferior 

 margins, which are sometimes very incomplete. Praeocular 

 spine present or absent. Rostrum broad, lamellate, and 

 vertically or nearly vertically deflexed, more or less distinctly 

 bilobated, and sometimes armed with lateral marginal spines. 

 Eyes (in the species I have examined) moderately elongated, 

 and capable of being retracted within the orbital cavity. 

 Antenna? with the basal joint usually very much enlarged 

 and sometimes armed with one or two small distal spines or 

 tubercles ; it occupies the space between the base of the ros- 

 trum and the orbit and generally constitutes a part of the 

 inferior wall of the orbit; the following joint is sometimes 

 slightly dilated and is not concealed by the rostrum. The 

 merus of the exterior maxillipedes is distally truncated, with 

 the antero-external angle more or less rounded and theantero- 

 internal angle emarginate. The chelipedes (in the male) are 

 moderately developed or short ; palm somewhat dilated and 

 compressed or subcylindrical ; fingers meeting along the inner 

 margins when closed, or with a large intermarginal hiatus. 

 Ambulatory legs moderately elongated, with the joints sub- 

 cylindrical, sometimes granulated, but without spines or 

 tubercles, the dactyli nearly straight, little shorter than the 

 penultimate joints. 



distinctive characters employed by R. Neumann in bis memoir entitled 

 ' Systematische Uebersicht der Gattimgen der Oxyrhynchen ' (Leipsic, 

 1878), never having seen a copy of this work. 



1* 



