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V. A Supplementarif RepoH on the Crustaceans of the Group Myodocopa obtained 

 during the 'Challenger ' Expedition, with Notes on other new or imperfectly known 

 Species. By G. Stewardson Brady, M.B., LL.D., F.R.S. 



Received August 28, 1895, read December 3, 1895. 



[Plates XV.-XVII.] 



Since the publication of my Report on the Ostiacoda of the 'Challenger' 

 Expedition I have received from Dr. John Murray and Professor G. 0. Sars further 

 specimens which were met with during the examination of other groups of Crustacea. 

 All of them are pelagic species belonging to the group Myodocopa, and it is with 

 Dr. Murray's approval that I record them here. In addition to the specimens so 

 obtained, I am in possession of other undescribed or imperfectly known forms which 

 have come into my hands at various times and which are of sufficient interest to make 

 their further description desirable. Among these are some collected by my brother, 

 the late Dr. H. B. Brady, F.R.S., among the South Sea Islands, and which were 

 described by me a few years ago ^ in the ' Transactions ' of the Royal Society of 

 Edinburgh. At that time, however, I was unacquainted with the soft parts of many 

 of the species, and was able to describe the shells only. Some of these descriptions I 

 am now able to improve by the addition of anatomical details derived from the 

 examination of macerated specimens. 



OSTRACODA. 



Section MYODOCOPA. 



Family CYPRIDINID^. 



Genus Cyclasteropb, nov. gen. 



The shell is more nearly spherical than is usual in Asterope. Frontal tentacle stout, 



3-(or 2'?)jointed. The first joint of the mandibular foot has a falcate masticatory 



process as in Asterope, but much more elaborately spinous ; the second joint, instead of 



being produced backwards in an angular process, bears on its distal margin a large 



tongue-like appendage which extends as far as the extremity of the following joint. 



The last limb (vermiform foot) is very profusely armed with setae, many of the 



segments bearing two or three on each lateral margin. In other respects the anatomy 



is that of Asterope. 



' " On Ostracoda collected by H. B. Brady, Esq., LL.D., F.R.S., in the tjouth Sea Islands," Transactions of 

 the Royal Society of Edinburgh, vol. xsxv. part 11 (1888). 



VOL. XIV. — PART III. No. 7. — April, 1897. H 



