Sttiilios on marine Oslracods 430 



den Dornen trennen, folgon." — In other words G. W. MULLER uses Brady's name Cydasterope 

 for the first of the three natural groups into which he had divided the genus Asterope in his work 

 of 1894. In addition to these three species which were referred to this group in 1894 this author 

 makes the genus Cydasterope include four more species, Cydasterope nrhicukiris, G. S. BRAin', 

 1897, C. ovulum and tenera, G. S. Brady, 1898 and Cypridina zealandica, \V. Baird, 1850 b. 

 On the other hand Cydasterope Hendersoni, the species given by G. S. Brady as the type-species, 

 is not included in this genus. This species is synonymized with Asterope HUgendorfi, 

 G. W. MOLLER, 1890 and is included, like Cydasterope fascigera, G. S. Brady, 1902 a, in the 

 genus Asterope, ,,sie passen zu dieser Gattung (Cydasterope) weder nach der Schalenform, noch 

 nach dem Bau der Furca". According to G. W. MiJLLER's view, the genus Asterope includes, 

 besides the two last-mentioned species, almost all the remaining species in this group. This 

 genus was characterized by the fact that the furca is armed with at least five almost similar, 

 slender claws, the distance between which is relatively small, ,,Zwischenraum kleiner als die 

 Dornen an der Basis breit". This author then points out that with a classification of this sort 

 there is no room for Asterope fusca, G. W. IVK'LLER, 1890. He writes, p. 33: „Keinen Platz 

 wiirde bei dieser Trennung finden Cylindroleberis fusca. In der Differenzirung der Furcaldornen 

 wiirde sie sich Cydasterope, im Bau der Dornen Cylindroleberis s. str. anschlieBen. Nach dem 

 Bau der Schale nimmt sie unzweifelhaft eine ganz gesonderte Stellung in ch-r Unterfamilie der 

 Cylindroleherinae ein; bei einer Revision derselben miiBte fiir diese Art eine besondere Gattung 

 aufgestelit werden." 



G. W. Mi'LLEli takes practically exactly the same view in arranging these forms in 

 ,,D as T i e r r e i c h", 1912; the only exception is that Cydasterope tenera is transferred to 

 the heading ,,Cypridinidarum genera dubia et species dubiae". Asterope fusca is referred to the 

 genus Cydasterope. 



G. O. Sars, 1869, p. 359 is the first to show that the genus Asterope is verv decidedly T'"' position «/ ihr 

 different from other C y p r i d i n i d s and that a higher svstematic unit ought to be formed ' f '■"'"'•'' 



_ '- o .. o ,„ relation In ihf 



from this genus, but this author does not set up any such unit. — We find a similar statement oth.T i\>ii,ri<iii,iii.<. 



in G. S. Brady, 1871, p. 292, but this author does not establish a systematic unit of this sort 



cither. C. Ci.AUS writes in 1876, p. 94, note 1: „Ich wiirde die hervorgehobenen, namentlich 



auf die Mandibeln, die beiden Maxillenpaare und den Besitz von Kiemen beziiglichen Eigen- 



thiimlichkeiten fiir vollkomnien ausreichend erachten, um Asterope den Cypridina ahnlichen 



Gattungen gegeniiber als Familio der A s t e r o p i d e n zu sondern. Jene Gattungen. 



Cypridina, Monopia. Philomedes, Bradycinetus stehen einander viel niiher und wiirden als 



C y p r i d i n i d e n vereinigt werden konnen." — C. Cl.AUS is accordingly to be regarded as 



the author of this systematic unit. G. S. Brady and A. .M. NoR.MAX say, however, that thev 



are its authors, 1896, p. 628. — G. W. Ml'LLER, 1906 b and 1912, gives the As t crop ids 



as a sub-family; this author divides, as we know, the sub-order Myodocopa directlv into 



families: Cypridinidae, Halocypridae and Polycopidae. 



The dii'isiiin nj lliia 



Remarks: — The svstematic division of this group carried out bv previous autht)rs, even "'^""'' '""," "' '"^"^ 

 that wliich is given by G. \V. MCllei; in ..Das Tierreiclr*. 1912, must be considered rather lo wr ii,i.<nii.<inri,tn/. 



