studios on niariiii' Oslracods 441 



Asterope teres, G. S. Brady and A. M. Nouman , 1896, p. 636, pi. L, figs. 7-10, pi. LII, figs. 20, 21. 



Type species: Asterope elliptica A. Philippi, cf. below. 



Divergences from tlie genus Asterope, G. W. MCller, 1912: 



The following species are included in this genus by this author, but are excluded by me: 



Cypridina Adamsi, W. Baird, 1847. 



Asterope Arthuri, T. Stebbing, 1900. 



Cydasterope fascigera, G. S. Brady, 1902 a. 

 ,, Hcndersoni, G. S. Brady, 1897. 



Asterope Hilgeiulor/i, G. W. MCller, 1890. 

 „ lichenoides, G. S. Brady, 1902 a. 



Species which, contrary to G. W. MtJLLEJi, I include in this genus: 



Cypris bimaculata, H. Nicolet, 1849. 



Cypridina nitidula, Fr. MCller, 1870. 



The two last-mentioned species are put by G. W. Mueler under the heading: ,,Cypri- 

 dinidurum genera dubia et species dubiae." In spite of the incompleteness of the original 

 description, there can scarcely be any doubt that Cypridina nitidula really belongs to Asterope 

 in the sense that this genus has been taken in the present work. (Tliis form is placed together 

 with the forms in this group by G. W. Mi'LLEl;, 1894.) But C. bimaculata is doubtful. 

 Everything indicates, however, that this sjaecies too belongs to this unit. 



Genus Cydasterope: — 



For description see beh)W. 



For reasons that are best seen in the historical resume given above pp. 438, 439 it seemed to 

 me necessary to give this genus quite another scope than G. W. MtiLLER had given it in 1912. 



Besides the species C. fascigera, re-described by me below, the following species are 

 probably to be included in this genus: 



Cydasterope Hendersoni, G. S. BRADY, 1897, p. 86, pi. XV, figs. 1—12. 



Asterope Hilgendorfi, G. W. MilLLER, 1890, p. 241, pi. XXV, fig. 1.5, pi. XXM, tigs. 8, 20, 



pi. XXVII, figs. 4—6, 17. 



Nor does it seem impossible to me that Asterope Arthuri, T. Stebbixg, 1!)oo, p. 66(J, 

 pi. LXXII, A should be included in this genus, but the position of this species is somewhat 

 uncertain. (It is described from a male larva.) 



Type species: Cydasterope Hendersoni, cf. p. 438 above. 



It was necessary to set up two new genera. These have been given the names Cydoleberis 

 and Asteropteron. 



Genus Cydoleberis:* — 



Diagnosis: — The shell, seen from the side, is rounded and has no decided 

 posterior corner and no decided sculpture. 



Second antenna: Kxopodite: The natatory bristles have a strong equipment 

 of spines; the basal spines are very powerful. Endopodite: This has rather numerous bristles 

 on the first joint. 



* From y.vy.A.o^ = cycle ami /.f^i/yf^ = shell. 

 Zoolog bidrriK, Uppsala. Siipp! -Bd I 5*"' 



