442 TA(;ii SKO(.isiiiai(; 



Mandible: The exopodite is relatively large. The endite uf the first protopodite 

 joint has Gompaxatively numerous and powerful ventral spines and bristles. The second proto- 

 podite joint and the second endopodite joint have a very abundant supply of bristles. 



Maxilla: There are a moderate number of bristles dorso-proximally on the basale; 

 the end joint lias rather numerous bristles. 



(Sixth 1 i m b: The anterior and posterior margins are concave, the anterior and the 

 posterior ventral corners, seen from the side, are pointed. 



)S e V e n t h limb: This has very abundant cleaning bristles; there are often, especially 

 distally, two or three of these on the same side of the same ring. There are only two end combs? 



F u r c a: This has three or four very powerful main claws, behind which follows a series 

 of (always rather numerous) bristle-like secondary claws. 



This genus comprises on the whole the same forms as G. W. MULLER, 1912 included in 

 the genus Cydastewpe. The following species are probably to be placed in it: 



Asterope americana, G. W. Muller, 1890, p. 24(). pi. XXA^ fig. 16, pi. XXVI, fig. 9, 



pi. XXVII, fig. 11. 

 brevis „ „ „ 1890, p. 239, pi. XXV, fig. lU, pi. XXVI, fig. 7, 



pi. XXVII, figs. 7—10, 15, 16. 



Cylindroleheris Lobiancoi, G. \V. MUller, 1894, p. 220, pi. IV, figs. 40, 42, pi. V, figs. 2, 



3, 26, 32, 34, 40. 



Cyclasterope orbicularis, G. S. Bi;auy, 1897, p. 87, pi. XV, figs. 13—19. 



ovulum, „ ,, ,, 1898, j). 432, pi. XLIII, figs. 24—30. 

 tenera, ,, ,, ,. 1898, p. 433, pL XLIV, figs. 27—29. 

 zealandica*, , 1898, p. 433, pi. XLIII, figs. 15—23. 



Type species: Cycloleberis Lobiancoi (G. W. Muller). 



divergences from the genus Cyclasterope, G. W. MC'LLKI;, 1912: 



Species included by this author in Cyclasterope, but not l)y me in the genus Cycloleberis: 



Ci/pridina Agassizi, Fr. Muller, 1870. 



Asterope fusca, G. W. MuLLEK, 1890. 



Species included by rtie in Cycloleberis l)ut not Ij\' G. W. Muller in Cyclasterope: 



('yclasterope tenera, G. S. Blb\DY, 1898. 



The last-mentioned species is placed by G. W. Muller, 1912, under the heading ,,Cypri- 

 dinidarum genera dubia et species dubiae". It is very incompletely described and the type 

 specimen was presumably far from being mature. In spite of this I think one may put it together 

 with the sj^ecies on which I have based this genus, without running too great a risk of being 

 mistaken. G. W. Muller in his work of 1906 b also places C. tenera together with these forms. 



Genus Asteropteron**: — 



Diagnosis: — The s hell varies somewhat in form. It is characterized by a very 

 decided sculpture, (always?) with strongly projecting, partly longitudinal, ridges. 



* I iniist li'uvc the qiii'slioii i|iiilc inidiH i(|c(| ;is In wliclliiT lliis lorm is synonymous willi Ci/iiruliiKi zcdlaiulica. 

 W. llAiiiii, 1850 1), p. 10:!, as ('.. S. IJhadv assuiiics. 

 ** Fitirn A-<tcro}ic and .'Ufoor - wint;'. 



