studies on marine Oslracods 443 



S. econd antenna: Kxopodite: The natatory bristles have no spines and there 

 are no basal spines. Endopodite: The two proximal joints in the female have no bristles. 



Mandible: The endite of the first protopodite joint has a moderate number of 

 comparatively weakly developed ventral spines and bristles. The second protopodite joint 

 and the second endopodite joint have a moderate number of bristles. 



Maxilla: This has few or no bristles dorso-proximally on the basale. 



Sixth limb: Seen from the side, this appendage has both an anterior and a posterior 

 pointed corner. 



Seventh limb: This has a moderate number of cleaning bristles, in most cases 

 only one on the same side of the same ring. 



The furca has three long, curved, rather slender main claws, behind whicli there 

 are a number (always rather few?) of considerably shorter and weaker secondary cliws. 



This genus includes two of the species placed by G. W. MCLLEH, 1912, in the genus 

 Cyclasterope, viz. : 



Cypridina Agassizi, Fr. Mt'LLEH, 1870, p. 255, pi. VIIT, fig. 26, pi. IX. 



Asterope fusca, G. W. Mf'LLEU, 1890, p. 242, pi. XXV, figs. 11—13. pi. XXVII. figs. 19 to 



22, 25. 



It is possible that Cyclasterope Ligiiriae, L. Granata, 1915. p. 30, fig. 5 is also to be 

 included in this genus; the position of this form is, however, very uncertain on account of the 

 deficiency of the description. 



Type species: Asteroptcron fuscum (G. W. MClleh). 



A number of other species are described, of which it may certainly be said that thev ■s>ciV.s- incenae 

 belong to this family, but whose position, apart from this, is unknown on account of the incom- 

 pleteness of the descriptions. Among these there are: 



Cypridina Adamsi, \V. B.MHl), 1847, p. 22, jjl. ^TI. This species is included, as is seen 

 above, in the genus Asterope by G. W. MCller, 1912; it does not seem to me impossible that it 

 belongs to the genus Cyc/asierojoe. G. W.MOeler writes: ,,Vielleicht identisch m\t A. HilgendorfiV 



Asterope lichenoides, G. S. Bradv, 1902 a, p. 180, pi. XXIII, figs. 22—24. This species 

 was also included in the genus Asterope by G. W. MCller. I have myself had an opportunity 

 of investigating the type-specimen of this species.* Unfortunately there was only the shell 

 of this specimen and the distal part of one cleaning limb, which I discovered inside the shell. These 

 organs were not sufficient to enable me to classify the species with complete certainty. I can 

 however say that it does not belong to the genus Asterope in the sense in which this genus is 

 taken in the present work. It will presumably be necessary to set up a new genus for it. The 

 shell, which it is, as a matter of fact, absolutely necessary to describe again, indicated a close 

 relationship to Cyclasterope; the cleaning liinl) was of about the same tvpe as that of Cyclnleberi.s. 



Besides these two species two forms placed by G. \V. MOLLER under the heading ..C\-pri- 

 dinidarum genera dubia et species dubiae" also come into this cjitegory. These are: 



Cyclasterope similis, G. S. Brady, 1902 a. p. 183, pi. XXIII, figs. 25—29. 



Asterope squamiger, T. Scott, 1894, p. 140, pi. XIV, figs. 56, 57, pi. XV, figs. 14. 22. 23, 2(). 



* In Uiu Zoological Musfinn .il Copinliau'iii. 



^edis. 



